Native Grass Gazette: A Heinous Invader

Rosinweed (Silphium integrifolium) blooms protruding through sericea lespedeza invasion.

Producing one to three million seeds per acre and remaining viable for what is thought to be up to 20 years in the soil, the seed rain alone creates an ever-abundant seed bank. Once established, plants will reduce or eliminate competing vegetation through shading, competition for water and nutrients and allelopathy. Introduced in 1896 at the North Carolina Agricultural Experiment Station to be tested as an agricultural crop, sericea lespedeza (Lespedeza cuneata) also known as Chinese lespedeza or Chinese bushclover, made its first recorded entry into the United States. In 1924, the US Department of Agriculture, using seed from Japan, planted it at the Arlington Experiment Farm in Virginia. Sericea lespedeza was commonly used for ground cover in mine reclamations and road construction particularly due to its adaptability to poor soil conditions. In the 1940’s USDA and many state agencies promoted sericea for forage, hay and wildlife food and cover. Reported in 2005, by C.A. Duncan, et al, Invasive plants of range and wildlands and their environmental, economic, and societal impacts, the estimated coverage of sericea lespedeza was 8.6 million acres in 2003. The authors also reported from a study site in Kansas that between the years 1989 – 2003, sericea had increased at a rate of 24% annually. I do not contend that the rate of increase is 24% annually range-wide, but it does demonstrate that sericea lespedeza has the capacity to overwhelm natural systems rapidly. Sericea is best adapted to areas of 30 inches of rainfall or greater and is tolerant of minimum temperatures down to -15 F. Figure 1 shows the approximate area of adaptation, though it is known to exist outside of the area indicated, however in limited distribution.

If you don’t have sericea your best strategy is to be diligent about scouting and treat it as soon as you see it. You can’t do much about the natural source of spread by animals, but be mindful of the human sources of spread. Cars, trucks, farm equipment all can capture seeds in the nooks and crannies then fall out to infest unoccupied areas. Mowing and haying equipment are particularly susceptible, miles and miles of highway rights of way have been contaminated by mowing after seed set. Thoroughly clean any equipment that has been in sericea infested fields. Pay attention to hay being hauled in, when buying, insist that it be sericea free. Don’t buy cattle from sericea infested pastures or farms. Seeds can be entangled in their coats and also pass through their systems to be deposited with manure.

When buying forage or habitat seed, relying on the seed tag analysis may not be enough. Depending upon what state you are in, sericea lespedeza may or may not be listed. It is a state noxious weed in Kansas and Colorado so it is required by law to be listed. Other states, under the “Weed Seed” section of the tag, may list it while in other states it may just be part of the percentage of unknown “Weed Seed” and unlisted. Also check the “Other Crop Seed” section of the tag as some seed companies commercially sell it. It is best to specifically ask if the seed vendor guarantees it to be free of sericea lespedeza seed. I would avoid buying native grass or other seed from any vendor who sells sericea lespedeza seed for fear of cross contamination.

If you have sericea lespedeza, controlling it is a challenge and a never-ending task. Even if you can eliminate established plants and seedlings, one study deduced that spring germinating seed may only represent 1% of the total soil-stored seeds. Based on that estimation, once you have it, you can plan on having it essentially forever.

Grazing, mowing, burning, hand weeding and herbicide provide varying degrees of control, better called suppression. In most instances an integrated approach will yield the best results.

Grazing – For the most part, livestock do not graze sericea due to its high tannin content, or it is among the least preferred so last to be grazed. The regrowth of sericea following a burn is palatable and grazed but quickly grows beyond palatability, likewise early emerging plants are grazed too, however if residual stems from the previous year persist, cattle are less likely to graze it. Some exceptions are in high stock density grazing systems, when cattle are forced to graze it – and may be a good strategy for management. Most studies report that sericea does not increase under grazing. Also, note that goats and sheep seem to do fine with sericea.

Mowing – Mowing during bloom does nothing to weaken the plant but it does prohibit it from going to seed, for the most part. Often, mowed plants will re-bloom and attempt to produce seed. If you have a late frost, they may produce viable seed. Mowing when carbohydrate reserves are low can help reduce vigor and annual mowing can reduce the stand, assuming you are also mowing during bloom to prevent seed-set. Lowest carbohydrate reserves are typically early-summer, after green up in spring. Continued mowing during the summer will continue to stress the plants and reduce their vigor.

Burning – Timing of prescribed fire has varying impacts on sericea lespedeza and can increase plant density and vigor. Spring burning stimulates sericea, which if done by itself is not a good strategy. Burning helps scarify seeds and stimulate germination, however if done in conjunction with other methods such as herbicide, grazing or mowing, can be effective. Burned plants are more palatable and burning removes residual stems which inhibit grazing. Because burning stimulates a flush of new seedlings, herbicide treatments following can help reduce the seed bank pressure while also eliminating established plants. The same principles for mowing following burning apply as listed above. Recent research conducted in the Great Plains have shown a reduction in sericea lespedeza with repeated annual growing season burns conducted when sericea is in peak bloom. It should be noted that successive burns may not be possible with heavy infestations of sericea due to lack of ground level fuel to carry the fire.

Hand weeding – Hand weeding is only effective for new seedlings. Established plants have a significant tap root and are next to impossible to pull out of the ground. Hand weeding would only apply to very minimal plant infestations on a very small scale due to the labor intensity.

Herbicide – Herbicide as a stand-alone practice is probably the most efficient but it has its drawbacks. Herbicides that are specific to sericea lespedeza do not exist. The common and less expensive broadleaf herbicides, (2,4-D, dicamba, picloram) are not effective. Glyphosate can be used but is not recommended because it is non-selective. Triclopyr, metsulfuron and triclopyr plus fluroxypyr are the most effective and cost efficient, but still expect chemical cost to be between the upper teens to low twenties per acre. All three have slightly different specifics about their use in relation to their rate and timing of application. In many cases broadcast applications are not desirable due to the presence of other favorable forbs and off-target damage, while spot applications are more targeted they can also result in off-target damage and are more time consuming. Broadcast applications are best suited for heavy infestations or in stands without forbs. Spot application works well for scattered plants or where other sensitive, desirable plants occur such as remnant prairie or in pollinator plantings.

An integrated approach to sericea suppression provides the best results. Combining burning with grazing, mowing or herbicides significantly reduces the population. In organic systems, burning with grazing and/or mowing can provide acceptable results.

The “take home” points:

  • If you don’t have sericea lespedeza do everything you can to keep from getting it.
    • If it shows up, get on it immediately, don’t wait for it to get to a threshold level before implementing management.
  • Once you have sericea lespedeza, you are always going to have it.
  • Be diligent in your sericea management strategy, don’t skip a year. You may be able to lessen effort in certain years based on plant population but don’t skip a year.
  • Use an integrated approach for best results.

Get mad, no, get angry at sericea lespedeza and attack it with a vengeance and don’t let up. It certainly isn’t going to let up on its invasion. Heinous invader.

Native Grass Gazette: “That One Thing”

Preface

I had the joy and privilege of filming and producing the Firing Up Your Beef Production video. Aside from being an avid hobby photographer, which is one reason why this project was so enjoyable, I met some of the most genuine, sincere and interesting people. During the interviews, it was obvious each and every one, in their own unique way, had a passion for what they were doing and the land they were on. This has been a rewarding project.

 

If you were a ranch owner and cattleman in the Great Plains and there was one thing you could do to halt and/or reverse woody encroachment, increase your carrying capacity, increase water availability, increase animal performance, increase forage quality and quantity, reduce parasites, improve grazing distribution, improve range health and protect against wildfire, would you do that one thing?

According to the ranchers and researchers interviewed in the recently released NBCI video, Fire Up Your Beef Production – A Ranchers’ Perspective of Prescribed Burning for Range Management, that is precisely what prescribed burning does.

Ranchers who are using prescribed fire on their ranches to improve their beef production shared their experiences for the filming of Fire Up Your Beef Production. It became apparent after the second interview there was a common theme developing … all the ranchers, in their own way, were saying the same things about woody encroachment control, water availability, carrying capacity, forage quality and quantity, range health and other topics. It was a script that was writing itself.

The focus of the video is on the ranchers but researchers were included to throw a little science in for those who want to hear that aspect, though in the real world most folks find those ranchers who are practicing what they preach to be very credible and, in the end, this video is targeted to ranchers.

The ranchers are the stars of the video. After all, when you get quotes like…

 “…springs started to flow again.”

“The thing with prescribed burning and grazing management is we’ve been able to run more cattle through the ranch which increases the bottom line significantly.”

“Range condition has definitely improved, (we have) a lot more tall grass than we used to and just all around better plant health.”

…then how can you go wrong? Ranchers are telling their own stories of how they use prescribed burning on their own ranches to improve their operation. These testimonials are sure to resonate with other ranchers who view this video.

The National Bobwhite Technical Committee’s Grassland and Grazing Lands Subcommittee charge in developing this video was to target it to ranchers, knowing if prescribed burning is implemented along with grazing management, bobwhites and other grassland wildlife will benefit. Wildlife enthusiasts are likely to ask why there isn’t more about bobwhites or wildlife in the video. Again, wildlife managers and bobwhite enthusiasts are not the target audience for this video, though there is plenty a wildlife manager could learn from hearing these landowners tell their experiences. Keep in mind, ranchers trying to make a living are the target audience.

Moving outside of our traditional NBCI promotion circles, cattlemen’s associations, grazing lands coalitions, associations of Soil and Water Conservation Districts, prescribed burn associations and several other groups received the news release announcing the video, and, of course, our traditional network of contacts. The video, in both long and short versions, is available for viewing at https://www.youtube.com/user/BringBackBobwhites/videos. Entities interested in obtaining copies for group screenings may contact Alyssa Merka at amerka@utk.edu for copies on DVDs or flash drives.

This project wouldn’t have happened without the cooperation of the ranchers, but there were many other people involved in the background who coordinated site visits for filming, set up the interviews, provided drone footage, answer the call for “b-roll,” reviewed our effort and provided quotes for our news release, and on and on. I am going to attempt to list everyone who had a hand in this project in one way or another. I apologize in advance for any omissions.

The state quail coordinators in Texas, Oklahoma, Kansas and Nebraska… Robert Perez, Derek Wiley, Jeff Prendergast and Jeff Lusk, respectively.

All of the ranchers: Linda Evans, Jerry Hunter, Cody Sander, Ted Alexander, Brian Alexander, Tom Carr and Greg Hurlbut.

Crew of many others: Alex Lyon, Kansas Department of Wildlife, Parks and Tourism (KDWPT); Allen Wilson and Reading Benefit Fire District, KS; Ken Brunson, The Nature Conservancy-Kansas; Barth Crouch, Kansas Grazing Lands Coalition; Craig Woods; Oklahoma State University (OSU); Russel Stevens, Noble Research Institute; Blayr Gourley, OSU; Chris Schenck, Texas Parks and Wildlife Department (TPWD) ; Kyle Banowsky, TPWD; Carol Baldwin, Great Plains Fire Science Exchange, Kansas State University (KSU); Aleksey Sheshukov, KSU; Tom Gross, KSU; Dan Donnert, KSU; Eva Horne, KSU; John Weir, OSU; David Engle, OSU; Brian Teeter, Pheasants Forever/Quail Forever; Alva Gregory, Oklahoma Department of Wildlife Conservation; Mike Remund, Nebraska Game & Parks Commission; Chuck Stanley, Natural Resources Conservation Service; Troy Smith, KDWPT; Society for Range Management; NBCI staff.

I hope I got everybody. Thank you!

The Native Grass Gazette: Ready, Set, BURN!!!

Prescribed burning in grasslands during the growing season as a management practice has been quietly taking place for a number of years, primarily by out-of-the-box thinking land managers. It is only recently that researchers have been looking at the practice and others are beginning to take notice. I suppose you could say it is in the early adoption phase.

Many are skeptical that a burn can be conducted during the growing season. After all, how can something that green burn? What about fuel moisture and the humidity? Typically, those are higher than what we normally conduct burns under. Then there are others concerned about the loss or damage to flora or fauna, and while those concerns are warranted, if the burn is planned and implemented properly, those impacts are minimal.

Growing season burns often create a burn mosaic, leaving valuable habitat for insects and pollinators as well as creating additional edge. (Jef Hodges)

 

First, as long as there is residual dead material from previous years’ growth, lush, green native grasses will burn during the growing season. Surprisingly well, in fact. The key is enough residual old growth to be fuel for the fire. Without that, it won’t burn – except under extreme circumstances under which you shouldn’t be conducting a prescribed burn anyway. Second, fuel moisture is much higher in the new green growth but fuel moisture in the dead residual material is much lower, though not as dry as during the dormant season; humidity varies greatly from west to east and relative to rainfall zones but is usually higher than during the dormant season as well. These two factors combined actually make growing season burning safer and less work than dormant season burns because the fire is less volatile, much slower moving and easier to extinguish.

Finally, to address the potential loss or damage to flora and fauna, burn only a portion of the total area within the field or planning unit. While burning during the growing season will damage some plants and animals, if areas are left unburned, they will serve as refuges, thus not eliminating entire populations of susceptible species and providing sources to repopulate the burned area.

I will provide a personal example of how growing season burning can create biodiversity. I don’t recall exactly when, but somewhere around 2000 I decided to try a growing season burn on an old big bluestem seed production field that was no longer productive. I conducted the burn in late July. The first thing I noted was the regrowth the bluestem put on after the burn. Within just a few days, bluestem shoots were emerging from the ground and by the time of our first frost plants were 12 – 18 inches tall.

From the bobwhite management perspective, this is an ideal height for nesting cover the next spring and the residual leaves can provide nest building material. The following summer I saw a number of different forbs begin to show up, ones which I’d never noted before. The balance of grasses to forbs was shifting. After several years of growing season burns the area is now a mixture of grass and forbs with about a 50:50 ratio of the two.

Recent research supports my unscientific observations. Researchers are finding nearly two times the plant biodiversity in growing season burned plots compared to unburned and even traditional spring burned. They are also finding more insect abundance.

This is the same field used to show the mosaic burn pattern of a growing season burn but this photo was taken the spring following the August burn. Note the mixture of grasses and forbs. The flowering plants are foxglove beardtongue. (Jef Hodges)

June is a good time to start planning your growing season burns, in preparation for late July or August. If planning to burn CRP as a mid-contract management practice be sure to check with your state about the primary nesting season dates and be sure to burn outside of those. If not burning CRP, burning can be conducted anytime, just be sure to leave unburned areas as refuges.

NOTE: there is always concern about destroying or disrupting bobwhite or other grassland bird nests with growing season burns. Weigh the risks against the benefits when deciding when to burn, keeping current habitat condition in context. If the grasses are thick and rank with lots of accumulated litter, odds are against quail nests or broods being present, whereas newly burned areas will provide ideal nesting in the future.

You should also prepare your fire guards. If mowing, mow them regularly to keep them functional. Fire guards mowed a few days before the burn don’t function very well; duff from the mower is likely to carry fire. Bare dirt fire guards left idle can grow up in annual plants, providing brood cover and high energy food sources later in the season.

Other considerations about growing season burns:

  • Growing season burns are easy to control and take minimal effort for those involved, however, it is important to recognize that heat can be an issue and everyone involved needs to stay hydrated and aware of their physical wellbeing.
  • Growing season burns spread out the workload and allow for more burn days in a year instead of trying to pack all your burns into a 6 to 8 week spring burn season, thus increasing capacity.
  • Growing season burns are very, very smoky. Smoke management is extremely important.
  • Growing season burns are slow. Allow 2 to 4 times as much time to complete burns as with similar sized dormant season burns.
  • Growing season burns when timed just before seed set can suppress sericea lespedeza and limit its spread.
  • Growing season burns provide good woody plant control.
  • Growing season burns provide spikes in forage crude protein just as burning does with spring burned native pastures.

There are many benefits to growing season burns, but also a number of precautions. Consider each on their own merit, weigh your objectives and begin planning your growing season burn.

Growing season fires are very smoky, so smoke management is extremely important. (Jef Hodges)

 

Native Grass Gazette: A Culture of Prescribed Fire (and a Safety Note)

It’s been a while since I’ve posted to the blog. Part of the reason for that is one of the topics I am covering in this post. I apologize for being so long between posts.

Make Safety a Priority

Lucky to be alive after being hit by a falling tree. Imagine what my head would look like if I had not been wearing the helmet.

This is off topic for a grassland blog … but not entirely. However, I think it is an important message to share. When I was working as a conservation contractor, felling trees, for one reason or another, was part of that work. As a result, I established a policy related to using chainsaws. There were three simple rules: 1) always wear saw chaps; 2) if felling trees, always wear a helmet; and 3) if felling trees over 8” dbh, always have another person present.

Earlier this year I was taking out some frustration on some trees (that’s how grassland people release frustration, that or burn something) when a 20” dbh tree I was felling started to lean one direction then took an unexpected change in direction, falling back towards me. I ran, but was unable to get out of the way before it came down on top of my head. I suffered a severe concussion along with some nerve and muscular injury to my neck and back. Had it not been for rule #2 and #3, rules I still follow though not doing contracting work any longer, it is likely I would not be writing this blog.

The message I want to share: always wear your safety gear. If you don’t have it, buy it. It’s a cheap investment. In this case, the quick action of the person that was with me and a $75 helmet, I’m convinced, saved my life.

 

A Culture of Prescribed Fire

Ranchers in the Flint Hills and other areas of Kansas are well equipped for conducting prescribed burns. Many coordinate with neighbors to facilitate burning. In some areas, Prescribed Burn Associations or rural fire departments conduct or assist with burns.

One of the projects I’ve been working on is a video on prescribed fire for cattle production in rangeland. Recently I was in Kansas shooting video, upon completing shooting for the day I headed from Kingman, KS to Medicine Lodge. At one point during the drive I could see no less than a dozen smoke plumes rising into the sky. In any other part of the county there would be general alarm at such a site, but in some parts of Kansas during the spring it’s part of everyday life, the people are accustomed to it. Though seeing a dozen smoke plumes was significant enough, it wasn’t nearly as significant as where it was. Last year, the Anderson Creek wildfire, which gained the dubious distinction of being the largest wildfire in Kansas history (312,427 acres) occurred just south and west of the town of Medicine Lodge in Barber County, KS (and other counties). This year, just 30 miles west of the area impacted by the Anderson Creek wildfire, the Starbuck wildfire in Clark and surrounding counties eclipsed the previous year’s record fire consuming 502,000 acres. You would think that following two consecutive years of record breaking wildfires, ranchers and citizens would be leery of fire, but not so. The locals have learned, many passed down through generations, that fire is good for rangeland; in that part of the country ranching is the primary industry and the economy is based on the productivity of the rangeland.

I certainly don’t mean to minimize the effect of wildfires on the ranchers and homeowners who were directly affected. Losing their homes, cattle and miles upon miles of fence will certainly have its financial and emotional impact, my thoughts and prayers go out to them, as well as my respect and admiration of what they are enduring.  But if there is any silver lining in the tragedy at all, it is the fact that the rangeland will be more productive, which will translate to better cattle performance and hopefully better returns at the sale barn.

Scene from the Starbuck wildfire which burned March 6th and 7th in Clark County, KS. Rangeland wildfires fanned by high winds and low humidities are non-discriminatory, consuming everything in their path across large landscapes.

Post fire green-up in the Starbuck wildfire. As devastating as the loss of infrastructure is, the silver lining is rangeland thrives following fire. Depending upon timing, green-up can be as quick as 3-5 days. Trees, consuming up to 30 gallons per day of valuable water, killed by the fire no longer compete with grasses.

Driving back to Missouri through Kansas took me through the southern Flint Hills. Arguably, the Flint Hills are the longest, most continuously burned landscape in the US and world. Indigenous people burned this landscape to facilitate bison hunting and that legacy has continued ever since as free roaming bison herds transitioned to domestic cattle production. Burning the Flint Hills is an annual ritual and part of the culture. If you live in or around the Flint Hills, you expect a good portion of them to burn each year. In some cases, too much burns; to the detriment of wildlife through the destruction of cover over a wide range, sometimes thousands of acres in one block. But given the choice of burning or not, in this landscape, burning is better.

 

A smoky haze fills the air across the Flint Hills of Kansas during the spring time. Look closely to see the wind farm, just less than 4 miles away from the vantage point of the picture.

 

Native Grass Gazette: NatiVeg – Helpful Tool or Curious Tchotchke?

I hate answers that begin with “it depends.” That usually means you are about to be inundated with tons of detailed, probably useless information which ultimately ends up with no clear answer to your question.

So, is NatiVeg a helpful tool or just a curious tchotchke? As much as it pains me to say this, it depends. How are you going to use it and what do you expect to get out of it?

First, for those not familiar, NatiVeg is a mobile website (https://www.quailcount.org/NatiVeg)  developed by NBCI to aid planners in selecting the correct native vegetation for their geographic location (limited to the 25 NBCI states) for their intended use. Released publically for comment on Nov. 16, 2016, NatiVeg can be used either as a desktop application or with a smartphone with GPS capability. An internet connection is required.

Many land planners dealing with working lands have limited knowledge of native vegetation, let alone its adaptability to a specific site or for specific purposes. NatiVeg was developed to provide planners with no or limited knowledge of native vegetation a tool for identifying native vegetation adapted to their selected location for their selected use. The target audience is persons providing technical assistance to landowners and/or landowners with the primary objective of incorporating native vegetation into their working lands.

NatiVeg uses Plant Hardiness Zones (PHZ) and Major Land Resource Areas (MLRA) as spatial components for search criteria of a database of Natural Resource Conservation Service Plant Material Center (NRCS-PMC) releases. NatiVeg returns a list of species known to be adapted to your selected geographic location. Herein lies the answer to the question of whether NatiVeg is helpful or a curious tchotchke.

Plant materials in the NRCS-PMC database have been through a process to document a variety of criteria, depending upon the intent of the release. In a majority of cases seed is commercially available or foundation seed is available for commercial increase, many of the releases have been planted in growing trials and their area of adaptation is documented, cultivars and selections have been made for desirable characteristics and there are some areas where local germplasm releases have been made with no selection criteria. (Both of those last two attributes are either good or bad depending upon your intended use and location) However, there are some limitations to the NRCS-PMC database; there are a limited number of releases (306 in the NBCI modified database) compared to a list of species that would have historically occurred for a location and there is skewed geographic distribution of native species releases, leaving limited choices for selected areas within the NBCI states.

MLRA’s are large geographic areas that are geographically associated land resource units based upon the dominant physical characteristics using physiology, geology, climate, water, soils, biological resources and land use, and they are thousands of acres in size. Obviously, there is variability within these areas, so though you may be in an MLRA where little bluestem is adapted, your specific location may be mesic or wet mesic and not suitable for little bluestem. For that reason, it is also important to consult the “Details” section of each species in NatiVeg to determine its appropriateness for the site. Information about collection location, comments or site adaptations can provide additional information to aid in decision making. If you still have questions or would like help there is a link to the state agency to help you find local assistance.

What about our non-target audience? Since the launch of NatiVeg I have received several comments from ecologists  wishing the application were more specific in relation to local ecosystems and vegetation communities. Fair comments, though those changes wouldn’t particularly serve our target audience any better. Remember a few lines above where I was listing the attributes of using the NRCS-PMC database; “There are some areas where local germplasm releases have been made with no selection criteria?” In some areas within the NBCI states there have been ecotype collections made and seed increases done. South Texas and Iowa/Missouri are two examples. Ecologists working in those regions will find plant materials suitable for restorations. Unfortunately, there is limited species availability and our database returns still don’t give a “big picture” list of species endemic to the location.

We are working on ideas to address this and determine if we even need to. It appears, based upon feedback, there is some need/desire for this type of product. At this point we don’t know if we will develop an entirely new product or work to expand NatiVeg, but we are examining options using NatureServe data or NRCS Ecological Site Description data. There may be others and we’ll examine all options.

Knowing some of the limitations of the database and spatial criteria, and understanding how to use additional resources to deal with those limitations, NatiVeg should be a helpful tool for our target audience … and in some instances our non-target audience. If you’re expecting a list of species endemic to your local ecosystem, then NatiVeg is probably a curious tchotchke.

To answer the question,” Is NatiVeg a helpful tool or curious tchotchke?”  It depends.

Images from the Grasslands

Hardwoods get all the attention this time of year for their fall color but ask me and I say the prairies are just as colorful.

Fall Color

Fall Color

 

The full moon on November 14th, which coincided with perigee, resulted in the closest supermoon since 1948 promised to provide some excellent opportunity for lunar photographs. I set up in a prairie planting in anticipation of the rare event, hoping to capture some once in a lifetime images. Unfortunately, clouds obscured much of the moon that evening in my location. What do you do when you are all set up with camera gear then can’t get the conditions you want? You take pictures anyway. Here are some of the shots I took.

bluestem-super-moon_reduced

Bluestem Super Moon

 

I used the moon to silhouette a senescing stem of big bluestem. After taking this shot I wondered how different it would look if the bluestem were illuminated.

 

Illuminated bluestem supermoon

Illuminated bluestem supermoon

 

 

I can’t decide which one I like best. What do you think? After taking this shot I decided to experiment with a technique called light painting, where you use a light source to illuminate the foreground while the exposure is being made. You can come up with some interesting results using this technique.

light-painted-bluestem-super-moon_redcued

Light-painted bluestem

 

 

 

Not to be denied a lunar image, a couple of nights later, under clear skies, I got a shot of the waning gibbous moon. It’s not the supermoon, but it’s pretty good. I call it Perigee Minus 2.

 

Perigee minus 2

Perigee Minus 2

 

 

Don’t let the weather keep you out of the prairies. Get out there and enjoy their beauty, regardless of the conditions there is always something picture worthy.

Miscellany November ’16

save-the-date-poster_reducedThe Fire Summit 2016: Changing Fire Regimes, a regional conference on fire science in the Great Plains, is set for Dec. 7-9, 2016 at the Hilton Garden Inn Conference Center in Manhattan, Kansas.

Landowners, fire managers, firefighters, agency personnel or anyone with interest in prescribed fire are invited to attend. The history of prescribed fire, current status and future will all be topics of the conference. Discussions will include national policy, partnerships, prescribed burn associations, smoke management, wildlife, funding sources, burn planning and much more. A tour of the world renown Konza Prairie is being offered as a post-conference activity.

Registration and additional information can be found at: https://www.eventbrite.com/e/fire-summit-2016-changing-fire-regimes-tickets-27490002337

 

Northeast Oklahoma Trex – Monday, March 13, 2017, 8:00 AM – Friday March 17, 2017, 5 PM
Vinita, Oklahoma

TREX is a prescribed fire training exchange that brings together fire practitioners from diverse backgrounds to obtain hands-on fire experience, share knowledge and expertise, and better understand the art and science of fire management and ecology.

In the field, hands-on training in prescribed fire planning, preparation and implementation, along with classroom sessions on fire ecology and fire line communications, will combine to form a busy week for participants in this first TREX (training exchange) ever for Oklahoma. We will be burning on several sites in an oak-pine ecosystem in northeast Oklahoma.

This training is for all interested fire practitioners and no NWCG certification is necessary to participate. College students, private landowners, tribal members, and fire fighters who are interested in learning more about utilizing prescribed fire as a land management tool are all welcome.  Registration for this training is limited to 20 people.

To Register: https://www.eventbrite.com/e/northeast-oklahoma-trex-tickets-29086926781

 

Progressive Cattleman – an online publication from Progressive Publishing recently posted a two-part series, Straight Talk on Native Grass Forages – by Patrick Keyser of the Center for Native Grasslands Management.

In my opinion, this is one of the best, most comprehensive, straightforward presentations of the facts about native grass forages, as well as some practical information. It addresses many of the myths and long-held misconceptions about native grasses as forages and backs it up with research evidence, not hearsay. Well worth the read and worthwhile to save to have on hand for future reference or to provide a copy to anyone interested in the facts about native grass forage.

You can find Part 1 at: http://www.progressivecattle.com/topics/range-pasture/7439-straight-talk-on-native-grass-forages. Be sure to click on the link to Part 2 to get the full story.

 

The National Provisioner reports on a study from Mississippi State University about native grass grazing and beef quality. Bottom line, no difference in quality but research also found steaks from cattle fed a big bluestem, indiangrass and little bluestem mix were less susceptible to lipid oxidation and had lower total fat percentage compared to cattle fed bermudagrass. You can read the article here: http://www.provisioneronline.com/articles/103632-does-native-grass-grazing-affect-beef-quality  Related article: http://mafes.msstate.edu/discovers/article.asp?id=18

The Root of It All … Don’t Forget Natives’ Role in Soil Health

2015 was the International Year of Soils and the fervor over cover crops that resulted still continues today. It seems every time I turn around I’m seeing another notice about a workshop or webinar addressing cover crops and their benefits.

Though the line between fact and commercial claim is somewhat blurred, it is generally recognized that cover crops provide the advantages of reduced soil erosion, increased water infiltration and water holding capacity, increased soil organic matter, reduced compaction and nutrient recycling.

To a large part, owing to their multiple benefits, is their claimed deep rootedness. With many of the common cover crop species, their roots fall within 2 to 3 feet of the soil surface, with some

Relative Root Depths of Various Grasses

Relative Root Depths of Various Grasses

reporting rooting as deep as 5.5 feet. Impressive to the uninformed, but amusing to those familiar with the roots of native vegetation.

As early as 1919 research of the roots of native prairie plants was conducted, followed by a number of other research projects through the 1930’s. While there are a handful of prairie plants whose roots lay within the upper 2 feet of the soil, the vast majority of native grasses and forbs root to a depth of over 5 feet with many well beyond that, some to depths greater than 15 feet.

In healthy prairie, below ground biomass far exceeds above ground biomass by two times or more depending upon species. Studies on big bluestem and little bluestem reported 5.4 tons/acre and 4.4 tons/acre respectively of root material in the upper 12 inches of soil. Talk about erosion control … every one of those root fibers is like re-bar in concrete!

All of those roots in the upper soil lead to increased water infiltration by increasing the macropore space (along with earth worms and other in-ground fauna), allowing the water a route to travel into and through the soil. Those roots and their ancillary structures also increase the micropore space which creates the water-holding capacity along with soil organic matter.

Over a three year period, depending upon the species and environmental factors, a very small percentage to as much as 100% of the root system dies and is regenerated. Using 50% just to provide an example and the examples of big bluestem and little bluestem above, 2.7 to 2.2 tons per acre of organic matter are added to the soil. It is a perpetual cycle that constantly replenishes itself.

The sources of compaction on native grasslands are entirely different than on cropland, thus the issue is different; however, when crop land is converted to native grass/forb mixtures, compaction issues are eliminated, or at least significantly mediated, through the deep rooting structure of the native plants.

A large part of the nutrient recycling provided by cover crops is due to nutrient uptake and subsequent release through decaying plant material. In a perennial plant such as native grasses or forbs this is much less significant, but the deep roots are able to tap into nutrients otherwise unavailable. This, in combination with associated mycorrhizal fungi, make native plants very efficient users of nutrients and moisture, thus their reduced or lack of need for supplemental nutrients and drought tolerance.

Following the International Year of Soils and all the attention given to cover crops, give some consideration to the value of the roots of native vegetation and their role in supporting soil health.

 

Native Grass Gazette: 2 Upcoming Meetings of Importance to the Grassland Community

July 17-20 the 24th North American Prairie Conference kicks off at Illinois State University in Normal, Illinois. Information about the conference can be found online at: http://nap2016.illinoisstate.edu/. This year’s theme is From Cemetery Prairies to National Tallgrass Prairies. The conference includes plenary and breakout sessions on Monday and Wednesday with a number of field trips to choose from on Tuesday.

The 10th Eastern Native Grass Symposium is in Evansville, Indiana August 29-31 at the Tropicana Hotel. Follow discussions and announcements about the symposium on the Eastern Native Grass Symposium Facebook page, along with an agenda. Conference registration and information is online via Eventbrite service. Hotel registration can be made by calling 800-544-0120 and using the group code: GEGGSYM. This block of rooms has been set aside for Monday – Tuesday on a first-come, first-served basis. The symposium rate is $89 per night and reservations need to be made by July 29.

Anyone interested in exhibiting or sponsoring the symposium should contact me at jhodge34@utk.edu.

Meetings like these provide an opportunity to meet and network with many other like-minded people, hear the latest news related to grasslands and help shape the direction of future grassland issues. Don’t miss an opportunity to be educated, make new friends and be involved in the process.

Keep the tall grasses growing and burn on!

Native Grass Gazette: Fescue Toxicosis and Native Grasses

Cattle gathering under shade is a telltale sign of fescue toxicosis

I believe most of you are at least somewhat familiar with fescue toxicosis. I was prompted to blog about it because of the time of year. Over the past several weeks, driving around during my daily activities, I noticed tall fescue seed heads emerging and cattle grouped under shade trees and in ponds — all three visual reminders about fescue toxicosis.

There are an estimated 35 million acres of tall fescue in the United States with as much as 85% of that infected with the endophyte fungus. An examination of fescue pastures sampled in Virginia in 2013 showed 95% were greater than 80% infected (incidence of the endophyte), with the lowest being 50% infected. Fescue toxicosis is estimated to cost US beef producers more than $2 billion annually in losses.

For those unfamiliar with fescue toxicosis or a brief refresher for others, cattle grazing endophyte infected tall fescue, compared to those not, exhibit reduced weight gain, reduced pregnancy rates, reduced milk production, lower weaning weight calves and reduced reproductive efficiency in bulls. Conditions that cause these symptoms are immunosuppression, vasoconstriction and poor thermoregulation.

The endophyte fungus is greater in the seed stalks and seed heads than in other plant parts so impacts on grazing animals are greater during this time of year; and this, combined with reduced forage quantity and quality during the late spring and summer months (remember the cool-season grass growth curve?) coalesces into poor animal performance during the summer. Recommended pasture management when seed heads emerge is mowing to remove their availability to grazing. However, in the same Virginia research mentioned above, alkaloid (alkaloids are the class of compounds produced by the endophyte fungus that causes fescue toxicosis.) concentrations were above the reactionary threshold level regardless of pasture growth stage or grazing management.

Figure 1: Alkaloid content by growth stage. Source: What we've learned about tall fescue management by Matt Booher for Progressive Forage Grower, published 1/29/16.

Figure 1: Alkaloid content by growth stage. Source: What we’ve learned about tall fescue management by Matt Booher for Progressive Forage Grower, published 1/29/16.

 

Therefore it did not matter when or how you grazed your endophyte infected tall fescue, it had the same impact on the animals. You can’t manage around it.

Experts do agree that you can dilute the intake of infected tall fescue by diversifying the planting … adding clover, orchardgrass, timothy or warm-season forages, but you don’t eliminate the effects of fescue toxicosis. Even then, you don’t address the slump in cool-season production during the summer months, with the exception of using warm-season forages.

The most effective way to eliminate fescue toxicity is to eliminate all toxic alkaloids from the animal’s diet and that is a practice many farmers and ranchers are undertaking today. Their option is to replace it with endophyte free, novel endophyte tall fescue or other forage that doesn’t carry the endophyte fungus. Endophyte free fescue doesn’t compete well with other plants nor does it persist under heavy grazing. As it turns out, the endophyte fungus provides a positive benefit to the plant. Novel endophyte tall fescue has beneficial endophyte fungus, just not one that creates the toxic alkaloids. However, if converting to novel endophyte tall fescue, all of the endophyte infected fescue MUST be eliminated before planting. Thus the recommended method for converting is to graze down the pasture, spray with herbicides, plant a cover crop, graze the cover crop, spray with herbicide and plant.

Guess what? This is the same method recommended for planting native warm-season grasses.

With all the steps being the same, it stands to reason the cost of establishment, for comparison’s sake, is the same except for seed, lime and fertilizer – because those will be different. I recently called a local seed supplier to get the price for novel endophyte tall fescue seed and their recommended seeding rate and a native grass seed supplier for the same information on big bluestem, indiangrass and switchgrass. The following table breaks down the variable costs. Note that it is difficult to make an exact comparison when talking about lime and fertilizer because those inputs are dependent upon the location and the soil test results. Most establishment guidelines recommend lime and fertilize per soil test recommendations, however native warm season grasses don’t need lime unless the site pH is less than 5 and only need P and K if they are measured in the low category. Nitrogen is seldom recommended for NWSG establishment, yet nearly always for CSG establishment. For the sake of this discussion let’s say that the pH is neutral and the P and K recommendations are the same.

Material

Recommended seeding rate

Unit cost

Cost range

N fertilizer

End-cost range

Estancia Tall Fescue

20 – 25 lbs./acre

$3.50 bulk pound

$70 – $87.50

$21.00*

$91 – $108.50

Big bluestem

8 – 10 lbs./acre

$8.00 PLS pound

$64 – $80

$0

$64 – $80

Indiangrass

8 – 10 lbs./acre

$14.50 PLS pound

$116 – $145

$0

$116 – $145

Switchgrass

4 – 8 lbs./acre

$10 PLS pound

$40 – $80

$0

$40 – $80

*50 units of N @ .42/unit. (Recommendation of U of K Extension publication; N cost based on call to local supplier.)

 

The Myths

Native grass is too expensive to establish.

The above table fully debunks the myth that native warm-season grasses are too expensive to establish. If you’ve made the decision to convert from endophyte infected tall fescue to novel endophyte, the cost argument is no longer valid.

I lose too much grazing time waiting on establishment.

When converting from endophyte infected to novel endophyte tall fescue there must be a “break-crop” planted in the interim and recommendations are to not graze seedling pasture the first winter; so you are losing grazing for one year. When planting native warm season grasses a “break-crop” is not necessary (though not discouraged either) and with proper planting methods and good weed control, it can be grazed a year later. Assuming the weather cooperates, under either scenario, there is no difference.

Native grasses require more management.

Really? Tall fescue experts recommend not overgrazing novel endophyte tall fescue, in fact you need to be more careful to avoid overgrazing; pastures should be rested and stubble heights should be no less than 4 inches. Native warm-season grass experts recommend not overgrazing native grasses, in fact you need to be more careful to avoid overgrazing; pastures should be rested and stubble heights should be no less than 8 to 12 inches, depending on geographic location. Hmm, sounds the same except for stubble heights.

The Advantages

During the summer months the advantage goes to native warm-season grasses. The summer months are their peak months of quality and productivity, whereas tall fescue, toxic or not, is at nearly its lowest point of quantity and quality. Average daily gains on NWSG during the summer are regularly at or above 2 lbs. per day, much better than tall fescue during this same time period, at 0.5 to 1 pound per day.

Care must be taken to not re-infect an infected fescue converted to novel endophyte tall fescue field. Cattle grazing infected fescue need to be “quarantined” for a day to avoid transferring seed in manure. Also infected hay cannot be fed in a novel endophyte pasture. Once a field is infected, it only gets worse because of the competitive nature of the endophyte infected plant. You have to ask, how easy will it be to find non-toxic hay and how much hassle is it to “quarantine” cattle for a day, knowing that unless it is in a field planted annually, will eventually be infected with the toxic endophyte? No need to worry in a NWSG pasture. If fescue invades, simply spray the field with a non-selective herbicide in the fall or spring while the native warm-season grasses are dormant and the cool-season fescue is actively growing.

We’ve already discussed the problems with animal performance related to fescue toxicosis so know that by removing them from the source of the problem, those performance issues are eliminated. That should be incentive enough but if you still aren’t convinced, the following probably won’t sway you either but it is important to know that NWSG’s improve soil health, water infiltration, nutrient filtration and carbon sequestration, above and beyond tall fescue, toxic or not. Oh and by the way, they are significantly more drought hardy; something producers wished they could have had in 2011 and 2012!

Seems logical if moving away from endophyte infected tall fescue that native warm season grasses should be part of that plan.