Plant Cover Crops

Learning about the benefits of planting cover crops.

Prevented planting

Fall Cover Crop Management

While in southern Minnesota in early September 2013 I was asked when a farmer should plow his cover crop field this fall because he needs the fields to be “black” this winter in preparation for next spring.  I shuddered.  There I was in a beautiful field of cover crops that are jump-starting some biology on a “biologically dead” field and the farmer wants to kill his biology driving mechanism.  UG!  The main reason he wanted to till the field was to have warmer soils in the spring where he had black soil.  I shared that our research sowed much different results.  His thought process sound right but has proven to be a myth, not a fact.

A beautiful stand of Oats, Berseem Clover, and Pasja Hybrid Brassica on prevent plant acres in SO. MN
A beautiful stand of Oats, Berseem Clover, and Pasja Hybrid Brassica on prevent plant acres in SO. MN

I told the farmer to leave the cover crops in all winter and use conservation tillage next spring.  (He’s not a no-tiller.)  We dug some shallow root pits for a field day and we found many problems that I believe can be somewhat rectified if the cover crops are left in all winter.

We found many soil health problems in this prevent plant field

  • Severe compaction– many areas had compaction starting at 2-3″ deep.  Part of that was from spring tillage of wet soils…but the compaction was about 8″ thick as the soil was coming up in blocks the size of cinder blocks!
  • Lack of soil biology – I know this because we found a significant amount of corn fodder 2 foot deep that was not even breaking down.  It would have been buried with the deep ripper 18 months ago.  I could not believe my eyes!
  • Lack of aeration in the soil – the soil was literally rock hard.  We did find a few earthworm channels but it was so dry that worms were small and deep.
  • Low organic matter – I’m not sure how low it was but there was very little soil structure.  I talked with a regional NRCS employee and the local SWCD specialist and both men lamented that many of the soils in that region were “about as bad as this one”.
We found corn fodder two feet deep that had not yet decompose after over 18 months.
We found corn fodder two feet deep that had not yet decompose after over 18 months.

I need to be fair.  The farmer currently renting this field has only farmed it a few years and he is making major strides to improve this farm.  But he has lots to accomplish before he has a healthy field.  Having cover crops are a great first step and he knows it.

Other solutions (instead of cover crops) being proposed to fix the “tight” soils (“unhealthy” soils) in the region

  • Tile – LOTS and LOTS of tile has been installed in prevent plant acres this year.  Farmers know they need aeration and percolation in their “tight” soils.  The regional specialist from NRCS lamented that many farmers don’t believe that cover crops are a solution to make their soils better long term.  Tile is not bad; but tile and cover crops are a much better solution.
  • Deep ripping – this will get air into the soil and break up compaction, but will it build soil health?  No, it will not  (note the corn fodder found 2 foot deep in a root pit).  Let cover crops naturally deep rip the soil.
  • Tillage- and lots of it – many fields in the area had been tilled (disked, field cultivated, etc…) four times already to control weeds…Unfortunately it also reduces organic matter and soil structure and soil health.

So what should happen with the cover crops heading into winter?

  • Leave the cover crop growing into the winter – This will give the best opportunity to help with aeration and percolation.  This also helps build soil structure and reduce compaction.  (See deep ripping, and tiling above…just let the cover crops do this naturally!)
  • Sarah Carlson from Practical Farmers of Iowa recently wrote an article about this topic and you can find it here Prevent Plant, Cover Crops, Now What 2013.
  • Let the cover crops keep putting down deep roots – we found roots of crimson clover, radishes, cereal rye, annual ryegrass, oats, and Pasja all around 24″ deep.  Let them keep growing deeper to open up the soil to get air and moisture deeply into the soil profile.
This 5 week old PileDriver Radish shows the compaction zone starts at around 2-3" seep. Roots on this radish went over 24" deep despite very dry conditions.
This 5 week old PileDriver Radish shows the compaction zone starts at around 2-3″ seep. Roots on this radish went over 24″ deep despite very dry conditions.
This field had very poor soil structure. The regional NRCS specialist told me that many fields in the area had similar issues
This field had very poor soil structure. The regional NRCS specialist told me that many fields in the area had similar issues

Cover Crop Field Day Set in Blooming Prairie, MN

PileDriver at Hagan Farms 2 33 days
This Radish was planted in late July 2013 and after 33 days has tremendous growth. This mix included oats and crimson clover and radishes.

Cover Crops will be the main topic of discussion on September 4, 2013 at a cover crop field day and meeting in Blooming Prairie, MN. I have the privilege of speaking at this event as we look at cover crops on prevented plant acres.  We will also look at what cover crops work best in the upper Midwest.  We will be on Brad Hagan’s family farm and possibly look at Dale Ramsey’s farm too.  Please note that we will be looking in root pits (where the action really is)!

I received this note from Legacy Seeds representative Andrew Heath about the field day/meeting:

“We  plan on structuring the event much like an open house with designated times where you will be able to address the crowd. We will start the event at 10 am and have you speak from 11 to 11:45 and again at 1 to 1:45. There will also be transportation to the cover crop plot and some of the field that you, TJ, Brad and I visited earlier with root pits dug. This will happen from 12 to 1 and 2 to 3.”

I have seen the plots and have added photos here on this post to entice you to come if you are in the region.

As a side note, Hagan farms will be no-tilling corn into these fields in 2014.  We’ll follow-up on these fields next spring and see how these fields compare to others that did not have a cover on them.

This prevent plant field had plenty of nitrogen from manure to capture. Hagan farms used a hybrid brassica and spring barley to secure the nitrogen and Berseem clover to produce more N and provide better soil health.
This prevent plant field had plenty of nitrogen from manure to capture. Hagan farms used a hybrid brassica and spring barley to secure the nitrogen and Berseem clover to produce more N and provide better soil health.

Cover Crops to the Rescue!

A Huge Problem

Brad, TJ, and Andrew inspecting on of Brads many cover crop fields that were planted in July 2013.on prevented planting acres.
Brad, TJ, and Andrew inspecting one of Brads many cover crop fields that were planted in July 2013 on prevented planting acres.

Recently I was in Minnesota with Brad Hagen, T.J. Kartes, and Andrew Heath looking at Brad’s 1,000+ acres or cover crops.  Brad had not intended on planting any of theses acres to cover crops in July, 2013…his intentions were to plant them in August or early September.  But spring 2013 rains and floods kept Brad from planting corn or soybeans on most of his 1,700 acres near Ellendale, MN (about an hour SW of Rochester, MN ).  Brad attended a cover crop meeting TJ set up for me to speak at on behalf of Legacy Seeds last March and as I spoke I could see Brad’s mind working.  When the spring rains came so did phone calls from Brad to TJ and from TJ to Andrew or me (or both)…”what can I do to build soil during this disaster?” was the theme of the weekly (if not daily) phone conversations.

You can seemingly look for miles without seeing a cash crop planted in some areas of SE Minnesota
You can seemingly look for miles without seeing a cash crop planted in some areas of SE Minnesota

Cover Crops to the Rescue!

Brad’s goals are to build soil and to scavenge nitrogen from his hog operation and build nitrogen with legumes.  Realizing that we would plant in early-mid July and not in mid-late August we all understood that we did not want to have to mow to remove seed heads if at all possible – so we left Radishes out of the mix.  We also realized that we wanted to use a “summer” clover, so we used Berseem Clover for it’s excellent growth and N producing ability.  We chose Oats as the grass in most fields and then we added a twist, Pasja or Vivant Hybrid Brassica.  I have worked with Pasja for over 10 years and rarely ever saw it produce a seed head in the summer or fall.  While Pasja (nor Vivant) have a big tuber like a Radish they do have the ability to scavenge a tremendous amount of nitrogen and earthworms dwell around their roots.

Brad Hagen looking at his Pasja Hybrid Brassica and Berseem clover. These are brand new species to Brad.
Brad Hagen looking at his Pasja Hybrid Brassica and Berseem clover. These are brand new species to Brad.  This field was planted 10 days before the photo was taken.

In some later July (and soon to be mid-August) planted fields we chose to use Spring Barley and Crimson Clover along with PileDriver Radishes and Appin Turnips.  TJ and Brad requested this mix so we’d get later fall growth, deeper penetration through compacted soils (Radish vs. Pasja/Vivant) and excellent N production from the Crimson clover.  Spring Barley was available and many folks in Kentucky have told me that barley makes the soil “sweet” (whatever that means).  From experience I know that soil after Barley is quite mellow.

Early August Report

From what I saw on August 1 I was very impressed!  As other folks in the region were planting straight Oats or possibly a few were adding Radishes very few other folks seemed to totally share Brad’s goals.  Brad told me that he is doing these cover crops because he wants to build his soil and because he wants his 7 year old son to have better soil to farm when he grows up and farms his place like Brad does with his father.  I’ll have more photos in a month or so.  I believe Andrew, Brad and TJ will plan a field day for September.  It’s beautiful country near the Hagen farm…it probably will be worth the drive in September to meet Brad and his family.  They’re pretty special folks…

Take a look at my You Tube channel “covercropdave” to watch an interview I have with Brad and TJ.

This beautiful stand of cover crops was planted July 2, 2013 at Brad's dad's place not far from the hog barns. If you sniff this photo real hard you can smell the hogs!
This beautiful stand of cover crops was planted July 2, 2013 at Brad’s dad’s place not far from the hog barns. If you sniff this photo real hard you can smell the hogs!

 

 

 

Prevented Planting Seeding Options

I recorded this video a few weeks ago for the seed company I work for. After receiving numerous calls and e-mails asking for help on what to plant, I decided to put this presentation together.  Many of the options I mentioned as being viable to plant in mid-June can still be planted in July.

Please check with your seed supplier for availability of the different species.  Until new crop is harvested there are several species that are in short supply.

Prevented Planting Seeding Options video.

It may take a few minutes to download the video.

 

 

Cover Crops and Prevented Plant Information Guidance

In late June I was on a farm in west central Wisconsin with two farmers that had over 3,000 of their nearly 6,000 acres that were too wet to plant in 2013.  This is an example of what I have seen and heard and read on personal farm calls, numerous phone calls, and multiple e-mails that farmers have asked for advice on “what to do.”

On my way home from that on-farm visit I called Ryan Stockwell from the National Wildlife Federation. NWF has been a great friend to agriculture and cover cropping.  I wanted to see what Ryan was hearing about potential changes in RMA Crop Insurance rulings for the upper Midwest – so farmers might be able to harvest their cover crops (or alternative forages) from their prevented planting acres before November 1, 2013.  What I heard from Ryan was not good news for the livestock producer that is desperately short of feed because of the drought of 2012 and severe alfalfa winterkill during the winter of 2012-13.

As I lamented to Ryan how I thought that there should be some “flexibility” in the crop insurance regulations, it hit me that farmers could possibly make more money harvesting forages and NOT taking their crop insurance payment.  That is when we got Sarah Carlson (Practical Farmers of Iowa) and Tom Kaspar  (USDA-ARS National Laboratory for Agriculture and the Environment in Ames, Iowa) involved.

If you are considering what to do with prevented planting acres and you need forage, or you are considering whether to put a cover crop on your prevented planting acres, then this article is for you.  Please read Cover crops and prevented plant information guidance.

My marking numbers on a notebook I began while driving down I-90/94 tuned into a full fledged article that was well beyond my expectations. Thanks to Ryan, Sarah, and Tom for making this a scientific article that more than solidified my idea and well exceeded my abilities.  You guys are the best!

 

Cover Crops and Prevented Planting Guidelines

There are thousands upon Thousands of acres - mainly in the upper Midwest not planted in early June 2013.
There are thousands upon thousands of acres – mainly in the upper Midwest still not planted in early June 2013.

Over the past few weeks I have heard from countless farmers in Wisconsin, Minnesota, Illinois, Missouri, Michigan, and Iowa that are considering taking prevented planting on all or parts of their farms. Growers Edge just published an excellent piece Prevented Planting Guidelines. 

Also see my articles on Prevented Planting Row Crop Acres – Which Cover Crops Can Help? and Summer Annual Grasses for Cover Crops for Prevented Planting Acres that may also be helpful.

Prevented Planting Row Crop Acres – Which Cover Crops Can Help?

The following was originally posted on May 27, 2011 when the Eastern Corn Belt was suffering with severe flooding and wet conditions.  In 2013 the Upper Midwest – especially Iowa, Minnesota, and Wisconsin – is flooded and wet.  Many farmers are considering taking the crop insurance for prevented planting.  Even if it would stop raining – which does not appear will happen anytime soon – many farmers will not be in their fields for two weeks.  While locations are different, the recommendations below still apply.  Please keep the farmers in the Upper Midwest in your prayers; they need it!

For other options that might include growing cover crops for forages click here.

More rain tonight on already flooded fields create a tough situation for many Midwestern farmers.
More rain tonight on already flooded fields create a tough situation for many Midwestern farmers.

In 2010 there were wet spots in fields that were never planted,  so some ingenious farmers planted cover crops in those spots after they dried out.  Now in 2011 there are several entire fields that may not be planted to cash crops at all.  I have heard from two friends in Ohio that are working on plans to help northwest Ohio farmers know what to use on their prevented acres.

Maybe this is not an issue where you live.  I hope you never have to face a spring like this year in the Eastern Corn Belt, where many producers in Ohio, Indiana, Illinois, and Michigan are struggling to get their crops in the ground.  The forecast is for many more days of rain to finish out the month of May.

For wet spots in fields there are many good options like these cover crop radishes that were planted later in the season in a field of sweet corn.

For prevented planting the cover crops may not be harvested until after November 1st.

So what are the options for planting cover crops in the prevented planted fields?  Below I will list the options with a few of their benefits and also some disadvantages.

Oats

Advantages

  1. Provides erosion control
  2. Scavenges nitrogen
  3. Grows a deep and fibrous root mass
  4. Promotes mycorrhiza growth
  5. Quick to establish
  6. Relatively inexpensive
  7. Can be broadcast and lightly tilled in
  8. Can be added to other cover crops to add additional value
  9. Can spray with broadleaf herbicides if necessary to control weeds

Disadvantages

  1. While they provide cover and decent root growth they do not provide additional nitrogen to the soil (at the most it would be very minimal)
  2. Best to use seed oats vs. bin run oats for optimum value
  3. If planting wheat after oats there may be some “grass after grass” issues (I’m not confident this will be a problem and would welcome comments)

 

Field Peas or Austrian Winter Peas

Austrian Winter Peas and cover crop radishes were planted into prevented planting acres in Michigan in 2010. These peas were producing nitrogen for the 2011 crop while fields that were sprayed or tilled for weed control had no such benefit.

Advantages

  1. Can provide 60-120 # nitrogen/acre (excellent if following with wheat in the fall)
  2. Can be broadcast and lightly tilled in (1″ or deeper)
  3. Can be added to other cover crops to add additional value (add to oats)
  4. Can spray with broadleaf herbicides if necessary to control weeds

Disadvantages

  1. Slower to establish than oats
  2. More costly than straight oats
  3. Seed MUST be inoculated at the time of planting

 

Crimson Clover

Advantages

  1. Can produce up to 150# N/acre within 100 days (great option if following with fall planted wheat or Winter Barley)
  2. Fairly quick to establish
  3. Relatively inexpensive
  4. Can be broadcast and lightly tilled in (1/4-1/2 inch deep)
  5. Can be added to other cover crops to add additional value (add oats at 1 bu/acre)
  6. Can spray with broadleaf herbicides if necessary to control weeds (This article is for seed production in the northwestern part of the USA)

Disadvantages

  1. More costly than straight oats
  2. Slower to establish than straight oats
  3. Seed MUST be inoculated (it may be purchased pre-inoculated)

 

Cowpea

Advantages

  1. Can produce 60-150# nitrogen/acre
  2. Can be broadcast and lightly tilled in (1″ or deeper)
  3. Can be added to other cover crops to add additional value (add to oats)
  4. Can spray with broadleaf herbicides if necessary to control weeds

Disadvantages

  1. Cost and availability of seed
  2. Slower to establish than oats
  3. Seed MUST be inoculated

Other crops to consider: Berseem Clover, Fava Beans, and others.

For further information, please read this excellent article by Barry Fisher, NRCS Agronomist from Indiana, who wrote on this very topic in 2009.

Summer Annual Grasses for Cover Crops for Prevented Planting Acres

With an abundance of prevented planting acres in Wisconsin and Minnesota in 2013, there is a need for cover crops to help build soil during the soil’s “idle” time.  In this post I’ll mainly focus on summer annual grasses that work well in the Midwest.

These recommendations will focus on whether feed is needed or not.  These cannot be harvested until  November 1 if crop insurance is taken.

If producers do not take crop insurance then there are other options mentioned below that give greater forage quality and yield.  However, many of these products are in very short supply.  Please call your local seed supplier to check on availability.

Summer Annual Cover Crops Where No Feed is Needed

I would recommend a non-BMR Sorghum Sudangrass at 10-12#/acre.  These should retail at $1.10-1.15/#.  This choice is less expensive per acre than most summer annual options.  This product is in very, very short supply for 2013.

Other cover crop options include non-BMR Sudangrass, which should be planted at a minimum of 10-20#/acre and will retail for around $1.20/#. Choices here would include Piper and Monarch V, among others.  Both of these products are in very short supply for 2013.

I would also consider Hybrid Pearl Millet. Seeding rate will be 7-10#/acre.  Hybrid Pearl Millet is in exceptionally short supply for 2013.

Plant each of these options at ½ -1” deep.  Apply at least 25-30# of nitrogen per acre so there will be some plant health.  There is very low supply on all of these items.  Farmers should mow to alleviate seed production. Mow periodically and leave 6-8” tall residual so there will be continued regrowth.

Here is BMR Hybrid Sudangrass in Late July 2009 ready for 2nd cutting.  This was seeded at 37#/acre.

Summer Annual Cover Crops Where Feed is Needed

If the prevented planting acres will be used for forage production, consider the following (with crop insurance taken–harvested after Nov. 1):

Take the options above and increase the seeding rates as shown below:

  • non-BMR Sorghum-Sudangrass  –35-50#/acre
  • non-BMR Sudangrass  — 25-30#/acre
  • Hybrid Pearl Millet –12-15#/acre

 

If the prevented planting acres will be used for forage production, consider the following (no crop insurance taken – harvested throughout the summer):

Pro Max BMR Hybrid Sudangrass.
Sudangrass can get quite tall and yield well if managed properly.

Option #1 for livestock feed I’d recommend BMR Hybrid Sudangrass at 35#/acre.  BMR Sudangrass is superior to non-BMR Sudangrass for grazing, animal production, haymaking, ensiling, etc.  Plant 35-37#/acre. Retail cost is around $1.75-1.80/#.

This is truly a superior product for dairy, beef, and sheep operations.  It is grown on many dairy and beef farms across the Midwest, Upper Midwest, and Mid-Atlantic states.  These products are in exceptionally short supply in 2013.

Option #2 is BMR Sorghum X Sudangrass.  Many BMR Sorghum X Sudangrass varieties  yield well and are very high in quality.  It is much more palatable than non-BMR products.  IF it is for dairy, plant at 50#/acre. Retail cost is around $1.45-1.50/#.  Supply is exceptionally limited in 2013.

Summer Delight Teff Grass
Teff Grass can produce great summer forage.

Option #3 is Teffgrass.  Teffgrass needs to be planted into an alfalfa-like seedbed at 1/8-1/4” deep.  Seed it at 10-12#/acre. Retail cost is $3.00-$3.25/#.  Supply is fair to good.

Option # 4 is Hybrid Pearl Millet planted at a higher seeding rate.  For forage, plant at 12-15#/acre.  Hybrid Pearl Millet is in exceptionally short supply for 2013.

See some of these products in OSU trials at:

http://oardc.osu.edu/forage2008/table15.asp and http://oardc.osu.edu/forage2009/table11.asp

Profitability for BMR  Sorghum X Sudangrass and BMR Sudangrass products is generally higher than for non-BMR products.  For instance, data on BMR Sudangrass has shown a 20% increase in animal production and therefore is considerably more profitable than non-BMR Sudangrass.  In a year like this I’d guess that maximizing profit will be important!  Be sure to use 75#/N (actual) for these products at planting time. Follow with additional nitrogen after each harvest.


This photo is taken on the same day in the same test plot as the Pro-Max seen above. Pro-Max out-yielded the Nutri-Plus by 20% in this trial in Northern Indiana in 2009.

You can e-mail me at dave@plantcovercrops.com for additional recommendations, or for locations of dealers where these products are available, or for other questions.

Prevented planting and cover crops- Risk Management Agency rules

Here is a listing of links from USDA’s Risk Management Agency  that pertain to prevented planting.  I hope most of you folks never need these; but I know many of you might need them this year!  Thanks to Desiree King from RMA for passing these along (and for all of here help in this matter).

Many acres were never planted into row crops in many Eastern Corn Belt states in 2011. Planting a cover crop in these fields may prove very beneficial for the future of these farms.

Here is our Prevented Planting Fact Sheet which explains the options a producer has when they are prevented from planting (including the option to plant a cover crop): http://www.rma.usda.gov/pubs/rme/ppflood.pdf

Here are our 2011 Basic Provisions (see section 17 regarding prevented planting rules-specifically Section 17(f)(5)) which state that a cover crop may be planted on PP acreage within or prior to the late planting period, but a cover crop may not be hayed, grazed or otherwise harvested within or prior to the late planting period. http://www.rma.usda.gov/policies/2011/11-br.pdf

Finally, here is a link to our Prevented Planting Loss Adjustment Standards Handbook. Section 5 (c) has a section on cover crops and prevented planting, which explains that they may not be hayed or grazed until November 1st and may not be otherwise harvested at any time. http://www.rma.usda.gov/handbooks/25000/2011/11_25370.pdf

All of these documents are available on the RMA website (http://www.rma.usda.gov/)

Here are links that give options for what to plant for cover crops.  Summer annual grasses for cover crops for prevented planting acres and Prevented Planting Row Crop Acres – Which cover crops can help?

Update on RMA Cover Crop Decision

Hey Folks,

Here’s an  email I received yesterday from Eliav Biton, National Wildlife Federation, who has been working diligently on the topic of cover crops with the RMA. I wanted to get it out to you right away. We’re receiving many questions about cover crop options for prevented planting acres.

All,

I spoke by phone with RMA today in both Springfield and Illinois. Some highlights:

1. They chose 2 weeks on the basis of the NRCS practice standard recommendation. In some cases they saw recommendations for 3-4 weeks, so they feel they are being flexible

2. A crop planted into a still growing cover crop is ineligible for insurance, period.

3. Producers who have cover crops that have gone to head (only these producers!) MUST file a written agreement by JULY 15th, which is the final insurance date. If they do so after corn or beans have begun to grow, they may have to have a “crop inspection” from RMA.  Currently 5 written agreements have been signed, covering no more than 100 acres.

4. RMA claims to have produced materials on this topic and worked with NRCS to disseminate the above information.

5. Sen Brown of Ohio will be sending RMA a letter. I am working with them on this. Currently our “ask” is that farmers who use cover crops are simply not treated discriminated against compared to farmers who did not. I am very open to other policy level “asks.”

In response to Travis’ suggestion to add RMA to this list, I would instead propose that we maintain this list for informal discussion. I will be happy to draft a letter to RMA based on the comments expressed on the list, and share it along with or without your names attached.

Finally, Sen Brown’s office will recommend to RMA that they meet with cover crop experts to review these issues. I imagine people on this list may be interested. I am happy to coordinate such an event. Let me know about your interest in supporting such an event.

Eliav Bitan