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Ontario Cover Crop Recipe – Wheat Going to Corn: Underseed Red Clover

Midwest Cover Crops Council (MCCC-127)

University of Guelph (SAG-FS-21-001)

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This publication is intended to provide a starting point for farmers who are new to growing cover crops. With experience, farmers may fine-tune the use of cover crops for their systems.

Introduction

The following recipe provides an introductory approach to underseeding a red clover cover crop into winter wheat prior to corn. Adding red clover to a wheat-corn-soybean rotation can improve corn and soybean yields, promote better soil, and provide a nitrogen credit, depending on growth and tillage. With good management, these potential benefits make a red clover cover crop worth investing in.

Planning and Preparation
  • Planning—Start small with one field. Prioritize cover crop management based on your goals. Avoid fields with a history of poor drainage, water ponding, or fertility issues.
  • Wheat variety and planting—No modifications to wheat variety and planting are required for the successful adoption of a red clover cover crop.
  • Winter wheat herbicides—Bromoxynil or MCPA are registered for wheat underseeded with red clover but with specific precautions to avoid injury. See Table 7-3, Herbicide Treatment Rates for Cereals, in Guide to Weed Control: Field Crops (see Resources).
  • Tillage or no-tillage—Red clover establishment may be more challenging in no-till systems. In fields with high residue, light tillage prior to wheat planting may improve seed-soil contact and establishment of red clover.
  • Fertility or liming—No changes are needed if applying P, K, lime, or manure in the fall before wheat planting.
  • Seed purchase—Seed prices can vary depending on the time of year; therefore, it is best to order seeds early. Red clover seed is readily available across Ontario. (See Cover Crop Seed Suppliers in Resources.)
  • Variety selection—Ontario growers can choose between double-cut or single-cut varieties, or a mix of both. Single-cut types tend to have less top growth than double-cut types. In thin wheat stands, choose single-cut; otherwise the height of double-cut may pose an issue when combining. Single-cut varieties are slightly more drought tolerant and may be favored in strip-till or no-till systems.
Late-Winter Work
  • Planting method and timing—Red clover can be broadcast into winter wheat just before green-up while the ground is still frozen and fields are fit to drive on. The freeze-thaw action will work the seeds into the ground. (See Underseeding Red Clover into Winter Wheat in Resources.)
  • Seeding rate for red clover—Broadcast red clover at a rate of 7–9 lbs/acre. For more information, see Agronomy Guide for Field Crops (in Resources).
Summer Work
  • Scouting—Look for red clover plants to have about 5 leaves during late May before the dry summer period.
  • Wheat harvest—Harvest wheat at the normal time. The red clover will continue growing until terminated.
Figure 1. After wheat harvest, clover stands that appear thin in spots, such as the one pictured, can still be very successful. Mowing can help suppress weeds while the clover becomes more established. (OMAFRA)
Post-Wheat Harvest Work
  • Evaluating a clover stand—The goal is a uniform stand of at least 3 to 4 plants per square foot. Clover stands may seem to disappear under hot and dry conditions immediately before wheat harvest but will often recover within one to two weeks.
  • Filling in patches—If red clover stands are inconsistent (Figure 1), red clover or crimson clover can either be drilled or broadcast into gaps. Alternatively, forage pea, an oat-pea mix or an oat-radish mix (see After Wheat, Going to Corn or Soybean in Resources) can be planted to suppress weeds.
  • Mowing—Scout and clip or mow the field before common ragweed or other weeds go to seed (Figure 1).
  • Termination—Significant root mass accumulates in the month of October, so it is best to delay termination as late as possible. There are two main methods:
    • Herbicide—Terminate red clover in the fall when it is actively growing and herbicides are most effective. Spring termination is less successful. (See page 5 of the Guide to Weed Control: Field Crops.)
    • Tillage—Red clover can be terminated using a moldboard plow in the fall or spring. Some growers do not plow and will follow up their herbicide termination with some tillage, but disc ripping will not effectively terminate red clover on its own.
Spring Work
  • Fertilizer—The nitrogen application rate to corn can be reduced by 73 lbs/acre for plowed clover and by 60 lbs/acre in a no-till system. (See page 24 of the Agronomy Guide for Field Crops.)
  • Corn planting—Check planting depth and seed furrow closure shortly after beginning to plant into the cover crop residue as usually some adjustments are needed.
  • Scouting—After corn planting, scout for crop emergence and population. Slug damage may occur if the clover was not tilled. Additionally, scout for red clover escapes and weeds since cover crop residue can often delay the emergence of annual weeds, which may delay the application of any post-emergence herbicides.
Resources

Cover Crop Selector Tool — available from Midwest Cover Crops Council

Guide to Weed Control: Field Crops (OMAFRA publication 75A)

Underseeding Red Clover into Winter Wheat (Field Crop News, OMAFRA)

Agronomy Guide for Field Crops (OMAFRA publication 811)

After Wheat, Going to Corn or Soybean: Use an Oat-Radish Mix (Ontario Cover Crop Recipe Series, MCCC-128/SAG-FS-21-002)—available from Midwest Cover Crops Council, Cover Crop Recipes

Fall Control of a Red Clover Cover Crop (Field Crop News, OMAFRA)

Authors

Jordan Grigg, Cameron Ogilvie, and Laura Van Eerd, University of Guelph; Anne Verhallen, OMAFRA (Note: This publication was adapted with consent from MCCC under a joint project to produce customized introductory guidance about cover crops for all member states/provinces.)

Reviewers and Contributors

Joanna Follings, OMAFRA; David Hooker, University of Guelph; Tatianna Lozier, Upper Thames River Conservation Authority; Anne Vanasse, Université Laval; Marty Vermey, Grain Farmers of Ontario

The Midwest Cover Crops Council (www.https://www.midwestcovercrops.org) aims to facilitate widespread adoption of cover crops throughout the U.S. Midwest and Ontario by providing educational/outreach resources and programs, conducting new research, and communicating about cover crops to the public.
Funding for this project was provided by McKnight Foundation.

July 2021

The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual’s income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA’s TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. ©2021 by MCCC. All rights reserved.

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Minnesota-Wisconsin Cover Crop Recipe – Post Canning Crops: Use Oats with Radish

Midwest Cover Crops Council (MCCC-126)

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This publication is intended to provide a starting point for farmers who are new to growing cover crops. With experience, farmers may fine-tune the use of cover crops for their systems.

Introduction

A canning or processing crop such as green bean, sweet corn, or pea is harvested early or by midsummer and offers an excellent window to get adequate cover crop growth before any following crop. Cover crops following canning crops will protect soil from erosion and improve soil structure after heavy harvesting equipment is used to take off the canning crop. Some canning crops leave significant residual nitrogen (N) in the soil that is vulnerable to leaching, and a cover crop can retain that soil N for future crops. Since growers follow canning crops with any number of different rotations, a fast-growing species such as oats mixed with a light seeding of radish is a safe choice as both will winter-kill. With this combination, no spring termination is needed, and there is little chance of tying up N for the following year.

Planning and Preparation
  • Planning—Educate yourself. Go to field days, learn from farmers who are currently planting cover crops, read about cover crops, check out cover crop research results from local universities, and work with your local Natural Resources Conservation Service (NRCS) and Soil and Water Conservation District (SWCD). Identify your goals in planting a cover crop as these will drive many decisions. Start small, and choose a field that has low weed pressure to create the best conditions for success. Consult with your crop insurance representative to ensure planned practices will not affect your insurance coverage.
  • Canning crop management—Follow best management practices regarding fertility and weed management, and make sure to notify the canning company that you’re planning on a cover crop after a canning crop harvest.
  • Residual herbicides—Commonly used herbicides can negatively impact cover crop establishment, so check the history of herbicide application for your field. Oats can tolerate many preemergence and postemergence herbicides. However, if the oats/radish biomass is to be grazed or used for feed or forage, you must follow the rotational crop restrictions listed on the label of any applied herbicides. Rotational restrictions should be checked for herbicides used in the current and previous cropping season if the cover crop is to be grazed or used for feed or forage. (See Using Herbicides and Cover Crops in Corn and Soybean in Resources.)
  • Seed purchase—Order cover crop seed early from a reputable source. If you grow your own, get it tested for germination, purity, and weed seed. Named varieties can produce more growth and have more predictable development, but they are usually more expensive than VNS (variety not stated) seed. Use good quality seed that has been cleaned and tested for germination and weed seed contamination. Utilize local sources of seed as much as possible to help prevent the introduction of invasive noxious weeds such as Palmer amaranth.
  • Fertility or manure—Fall fertilizer incorporation could damage the cover crop and destroy any structure gained, so plan to apply any needed fertility after the cover crop has winter-killed. If manure will be applied in the fall, use low-disturbance injectors to minimize damage to the cover crop.
Summer/Fall Field Work
  • Timing of cover crop planting—After canning crop harvest, some light tillage may be necessary to create a seedbed for the cover crop. Using a leveling tool such as a vertical tillage bar with an air seeder on top allows for tilling and seeding the cover crop at the same time. Try to time seeding when rain is in the forecast, or if you use irrigation, you can water in the seed for reliable establishment.
  • Planting method—Drill the seed to a depth of 0.75 inch, or broadcast the seed with a shallow incorporation to less than 1 inch to allow for good seed-to-soil contact and enhanced establishment.
  • Seeding rate—For oats, a minimum seeding rate of 21 lbs./acre of pure live seed (PLS) is suggested when seed is drilled or incorporated. The seeding rate should be increased to a minimum of 45 lbs./acre of PLS if broadcast. For radish, the rate is 1.2 lbs./acre if drilled or incorporated, and 1.7 lbs./acre if broadcast. These rates are based on a mixture of 70% oats–30% radish. If another ratio is desired, rates should be adjusted using the Minnesota Cover Crop Design Tool (see Resources).
  • Tillage—No fall tillage is needed. The oat/radish residue will freeze, then decompose over the winter, and a cash crop such as field corn or soybeans can be no-tilled into the residue if you wish. While full-width tillage may be used in the spring, this will reduce soil structural improvements the cover crop provided over the winter.
  • Future considerations—An oat/radish mixture is promoted here as the entry-level cover crop mixture post-canning crop. In future years, you may consider grasses that survive the winter (e.g., winter rye or triticale) for spring erosion control or legumes (e.g., crimson clover, which winter-kills, or red clover, which survives the winter) to supply N to the next cash crop. However, both of these options will have separate considerations and management recommendations. Use the Cover Crop Selector Tool (see Resources), or visit with local representatives of NRCS or Extension for more specific information on seeding other species.
Figures 1 and 2: An oat-radish mixture planted Aug. 25 in Dakota County, MN, pictured on Sept. 24 (top) and on Oct. 14 (bottom). (Ashley Gallagher, Dakota SWCD)
Spring Work
  • Scouting—In the spring, scout the remaining cover crop residue, and note whether any oat seed that remained dormant over the winter begins to sprout in the spring. Any grass-target herbicide should take care of these escapes.
  • Cash crop planting—Most modern row planters are fully capable of planting corn or soybeans into residue from a dead oat/radish cover crop. Row cleaner attachments may be beneficial. Check planting depth and seed furrow closure shortly after beginning to plant in case any planter adjustments are needed, such as increasing down pressure to move through increased residue.
  • Scouting after planting—After planting, scout for emergence and population as well any insect, disease, or weed pressure.
Resources

University of Minnesota Extension Cover Crop website

Cover Crop Selector Tool —available from Midwest Cover Crops Council

Minnesota NRCS Resources, including Minnesota Cover Crop Design Tool

USDA-NRCS Cover Crop Termination Guidelines

Using Herbicides and Cover Crops in Corn and Soybean (University of Minnesota Extension)

Authors

Anna Cates, University of Minnesota Extension; Ashley Gallagher, Dakota Soil and Water Conservation District (Minnesota); Steve Lawler, Mower Soil and Water Conservation District (Minnesota); and Matt Ruark, University of Wisconsin–Madison Division of Extension

Reviewers and Contributors

Carl Rosen, University of Minnesota; Ken Schroeder and Dan Smith, University of Wisconsin–Madison Division of Extension; and Carissa Spencer, Minnesota NRCS

The Midwest Cover Crops Council (www.https://www.midwestcovercrops.org) aims to facilitate widespread adoption of cover crops throughout the Midwest by providing educational/outreach resources and programs, conducting new research, and communicating about cover crops to the public.
Funding for this project was provided by McKnight Foundation.

March 2021

The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual’s income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA’s TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. ©2021 by MCCC. All rights reserved.

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Ontario Cover Crop Recipe – Post Corn Silage, Going to Soybean: Introduce a Fall Rye Cover Crop

Midwest Cover Crops Council (MCCC-125)

University of Guelph (SAG-FS-20-001)

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This publication is intended to provide a starting point for farmers who are new to growing cover crops. With experience, farmers may fine-tune the use of cover crops for their systems.

Introduction

The following recipe provides an introductory approach to integrating a cover crop after corn silage harvest and before planting soybean as the next crop.

Planning and Preparation
  • Planning—Read about cover crops. Go to field days. Start small. Be timely. Prioritize management based on purpose and objectives.
  • Residual corn herbicides—Read the product label to identify any recropping restrictions for planting fall rye (Secale cereale L.) after silage corn harvest. Rye should not be grazed or harvested for forage unless product labels explicitly permit the use of an underseeded, treated crop as feed or the recropping restrictions are followed. (See Table 4-4, Herbicide Crop Rotation and Soil pH Restrictions—Field Crops, in Publication 75A, Guide to Weed Control: Field Crops in Resources.)
  • Seed purchase—Order rye seed early, usually by early summer. Use good quality seed from a reputable seed dealer. Bin-run seed doesn’t have guaranteed germination and may come with unwanted weed seeds. Consider doing a germination test before planting and adjust seeding rates accordingly.

Fall Work

  • Fall manure—It generally works best to plant cover crops following manure application via injection or surface application and incorporation. Nevertheless, so long as soil conditions are fit, manure can be applied by dragline or tanker once rye has passed the 2-3 leaf stage. This is not likely to damage the rye since the growing point remains below the ground in the fall.
  • Tillage or no-tillage—Generally, it is easier to integrate cover crops into no-tillage or strip-tillage systems. If tillage is necessary to incorporate manure or smooth the seedbed after corn silage harvest, it should take place prior to rye seeding.
  • Timing of planting—Plant rye as soon as possible after silage corn harvest and at least two weeks before the average hard frost date (-2°C). If planting later than mid-October, double the seeding rate.
  • Seeding rate—Seed at a rate of 40–90 lbs/acre (assuming a germination rate of 85% or greater). Seeding rates should be increased by 50% if broadcasting and incorporating or be doubled if just broadcasting. If the rye will be grazed or harvested as a silage crop in the spring, use a rate of 100–170 lbs/acre.
  • Planting method—Drill to a depth of 1–1.5 inches or broadcast with shallow incorporation to less than 1.5 inches. Aerial or other broadcast seeding is an option for earlier establishment into standing corn with some risk of poor or inconsistent establishment. Overly wet or dry conditions after aerial seeding or presence of slugs will limit success.
  • Other fall operations—Use a current soil test (no older than four years) to determine lime or nutrient requirements for next year’s crop. If needed, thoroughly incorporate before seeding the rye cover crop.
Rye on May 2, 2019, drilled the previous fall after corn silage at the Elora Crops Research Station (Jake Munroe)
Rye on May 2, 2019, drilled the previous fall after corn silage at the Elora Crops Research Station (Jake Munroe)
Spring Work
  • Termination timing—Terminate the rye in the spring when plants are 6 to 12 inches tall and actively growing or about two weeks before planting soybeans—whichever comes first. In a wet or windy spring, be ready to take advantage of any break in the weather and/or use low axle weight sprayers.
  • Termination herbicide—Rye can be terminated with glyphosate after the rye begins growing in the spring (see Publication 75A, Guide to Weed Control: Field Crops in Resources). Effectiveness and speed of termination improves if rye is rapidly growing and air temperatures are warmer (>15°C). Larger rye, rye past the boot stage, or rye sprayed during cooler weather can be more difficult to kill, may require higher glyphosate rates, and will die more slowly.
  • Option to harvest rye as a silage crop—Some growers may be interested in harvesting rye as an additional silage crop. Make sure all herbicide restrictions are followed. Also, this will typically delay the planting date for the next crop, but any fall-applied nutrients can be counted toward the rye crop in nutrient management planning. (See Resources for additional information on rye forage management.) Be sure to control rye regrowth.
  • Soybean planting—Almost all modern planters and drills, with some modifications, are capable of planting soybean into a rye cover crop. Check that soybean seed is planted into moisture and the slot is closed shortly after beginning to plant; usually some adjustments are needed.
  • Scouting—After planting, scout for soybean emergence, stand establishment, and weed control. Rye residue can delay annual weed emergence, which may shift the timing of post-emergence herbicides.
Resources

Cover Crop Selector Tool —available from Midwest Cover Crops Council

Publication 811, Agronomy Guide for Field Crops (OMAFRA)

Publication 75A, Guide to Weed Control: Field Crops (OMAFRA)

Cover Crops (OMAFRA web publication)

Double Cropping Fall Rye for Extra Forage (OMAFRA web publication)

Get a Jump on Early Spring Forage (OMAFRA web publication)

Authors

Cameron Ogilvie, University of Guelph; Jake Munroe, OMAFRA; Mike Cowbrough, OMAFRA; Christine O’Reilly, OMAFRA; Laura Van Eerd, University of Guelph; Anne Verhallen, OMAFRA

Reviewers and Contributors

Dale Cowan, AGRIS Co-operative Ltd.; David Hooker, University of Guelph; Peter Johnson, Real Agriculture; Darren Robinson, University of Guelph; Peter Sikkema, University of Guelph; and François Tardif, University of Guelph

The Midwest Cover Crops Council (www.https://www.midwestcovercrops.org) aims to facilitate widespread adoption of cover crops throughout the U.S. Midwest and Ontario by providing educational/outreach resources and programs, conducting new research, and communicating about cover crops to the public.
Funding for this project was provided by McKnight Foundation.

August 2020

The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual’s income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA’s TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. ©2020 by MCCC. All rights reserved.

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Michigan Cover Crop Recipe – Post Corn Silage, Going to Corn: Use Cereal Rye

Midwest Cover Crops Council (MCCC-123)

Michigan State University Extension (CC-06)

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This publication is intended to provide a starting point for farmers who are new to growing cover crops. With experience, farmers may fine-tune the use of cover crops for their systems.

Introduction

The following recipe provides an introductory approach to integrating a cover crop after corn silage harvest and planting corn for grain or silage as the next crop.

Planning and Preparation
  • Planning—Educate yourself. Start small. Be timely. Prioritize management based on your purpose and objectives. If you intend to use cereal rye as a forage in the spring, refer to Recommended Hay and Pasture Forages for Michigan for management recommendations. (See Resources.)
  • Soil testing—Get your soil tested at least once every three years, and follow recommendations.
  • Corn hybrid and planting—If possible, plant the preceding corn silage crop early and use an earlier hybrid within the adapted maturity range for your location.
  • Residual corn herbicides—Cereal rye can be planted in the fall and produce a successful stand following most spring-applied residual corn herbicides. If cereal rye is to be grazed or harvested for forage, there are some herbicide time-interval restrictions. (See Weed Control Guide for Field Crops in Resources.)
  • Seed purchase—Order cereal rye seed by early summer. Named rye varieties can produce substantially more growth and have predictable development, but they are usually more expensive than VNS (variety not stated) seed. Use good quality seed from a reputable seed dealer.
Fall Work
  • Corn silage harvest—Harvest fields where cereal rye is to be planted as early as possible.
  • Fall manure—It generally works best to plant cover crops following manure application via injection or surface application and incorporation. Manure can also be injected with a low-disturbance applicator after the rye cover crop is at least 4 inches tall. Other application methods into or onto established cereal rye may result in significant damage.
  • Field preparation—Cover crops can be integrated into all tillage systems. If tillage is necessary after corn silage harvest, it should take place prior to rye seeding.
  • Timing of planting—Plant cereal rye as soon as possible after corn harvest and at least two weeks before the average hard frost date (28°F). If planting later than mid-October, consider increasing the seeding rate.
  • Seeding rate—Seed at a rate of 40–60 lb./acre (assuming a germination rate of 85% or greater). Seeding rates should be increased by 10% if broadcasting with incorporation and by 20% if broadcasting only.
  • Planting method—Drill to a depth of 0.75–1.50 inches or broadcast with shallow incorporation to less than 1.50 inches. These two methods produce the most consistent stands. Aerial and other broadcast seeding are also options and can facilitate earlier establishment into standing corn with some risk. Overly wet or dry conditions after aerial/broadcast seeding may limit success. Harvest should be planned within two weeks of seeding.
  • Other fall operations—Surface applying potassium (K) or lime before the ground freezes will not harm cover crops under normal soil moisture conditions, although some damage may occur in the wheel tracks.
This cereal rye cover crop was planted after a corn silage harvest. (Kim Cassida)
This cereal rye cover crop was planted after a corn silage harvest. (Kim Cassida)
Spring Work
  • Termination timing—Terminate the cereal rye in the spring when plants are 6 to 12 inches tall and actively growing or at least 10 days before planting corn—whichever comes first. In a wet or windy spring, be ready to take advantage of any break in the weather and/or use low axle weight sprayers. Be familiar with the rules related to termination timing and crop insurance. (See NRCS Cover Crop Termination Guidelines in Resources.)
  • Termination methods—Cereal rye can easily be terminated with a full rate of glyphosate (1.13 lb. acid equivalent/acre) after the rye begins growing in the spring. Use best management practices for glyphosate to improve effectiveness. Effectiveness and rapidity of termination improves if rye is rapidly growing and air temperatures are consistently warmer (> 50°F). Cereal rye can also be terminated by tillage, although multiple passes may be necessary. Larger rye, rye past the boot stage, or rye sprayed during cooler weather can be more difficult to kill, may die more slowly, and will likely tie up available nitrogen (N), requiring higher rates of N for the following corn. (See Cover Crop Termination in Resources.)
  • High cereal rye biomass considerations—If cereal rye biomass exceeds one-half ton/acre (dry matter), apply N toward the higher side of the application guidelines and apply at or before planting. If manure was applied in the fall prior to cover crop planting, cereal rye biomass in excess of 1 ton/acre (dry matter) may reduce or eliminate the amount of N available for the next corn crop. (See Cover Crops, Manure, and Nitrogen Management in Resources.) In this case, consider harvesting the cereal rye for forage or switching from corn to soybean.
  • Option to harvest or graze cereal rye as a forage crop—Some growers may be interested in harvesting or grazing cereal rye as an additional forage crop. Growing cereal rye for forage requires a different management system. (See Recommended Hay and Pasture Forages for Michigan in Resources.) Make sure all herbicide rules are followed. Using cereal rye as a forage crop may delay the planting date for the next corn crop.
  • Corn planting—Proper planter adjustment and maintenance is critical to achieve success when planting into cover crop residue. When planting no-till, modern planter setups can handle planting into grass cover crop biomass. Row cleaner attachments can sometimes be beneficial to increase soil warming but may plug with cover crop residue if not set up properly. Check planting depth and seed furrow closure shortly after beginning to plant and adjust as needed.
  • Starter fertilizer—Consider equipping your corn planter with a 2×2 starter fertilizer applicator and aim for an N rate of 30–50 lb./acre.
  • Scouting after planting—Scout for corn emergence, population, and insect pests after planting. Additionally, scout for weeds because substantial rye residue may delay emergence of annual weeds, which may then delay the application of post-emergence herbicides. (See Weed Control Guide for Field Crops in Resources.)
Resources

Cover Crop Selector Tool —available from Midwest Cover Crops Council

Recommended Hay and Pasture Forages for Michigan (Michigan State University Extension publication E-3309)

Weed Control Guide for Field Crops (Michigan State University Extension publication E-0434)

NRCS Cover Crop Termination Guidelines—available from the USDA–National Resources Conservation Service

Cover Crop Termination (Michigan State University Extension website)

Cover Crops, Manure, and Nitrogen Management (University of Wisconsin–Madison Extension publication A4178)

Authors

Dean Baas, Kimberly Cassida, Christina Curell, Sarah Fronczak, Paul Gross, Monica Jean, Phil Kaatz, and Elizabeth H. Schultheis, Michigan State University (Note: This publication was adapted with consent from MCCC under a joint project to produce customized introductory guidance about cover crops for all member states/provinces.)

Reviewers and Contributors

Boyd Byelich, USDA–Natural Resources Conservation Service; Erin Hill, Michigan State University; Eileen J. Kladivko, Purdue University; Anna Morrow, Midwest Cover Crops Council; and Maninder Singh, Michigan State University

The Midwest Cover Crops Council (www.https://www.midwestcovercrops.org) aims to facilitate widespread adoption of cover crops throughout the Midwest by providing educational/outreach resources and programs, conducting new research, and communicating about cover crops to the public.
Funding for this project was provided by McKnight Foundation.

August 2020

The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual’s income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA’s TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. ©2020 by MCCC. All rights reserved.

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Michigan Cover Crop Recipe – Post Corn Silage, Going to Soybean: Use Cereal Rye

Midwest Cover Crops Council (MCCC-124)

Michigan State University Extension (CC-07)

Download PDF

This publication is intended to provide a starting point for farmers who are new to growing cover crops. With experience, farmers may fine-tune the use of cover crops for their systems.

Introduction

The following recipe provides an introductory approach to integrating a cover crop into a corn silage–soybean rotation.

Planning and Preparation
  • Planning—Educate yourself. Start small. Be timely. Prioritize management based on your purpose and objectives. If you intend to use cereal rye as a forage in the spring, refer to Recommended Hay and Pasture Forages for Michigan for management recommendations. (See Resources.)
  • Soil testing—Get your soil tested at least once every three years, and follow recommendations.
  • Corn hybrid and planting—If possible, plant the preceding corn silage crop early and use a hybrid within the adapted maturity range for your location.
  • Residual corn herbicides—Cereal rye can be planted in the fall and produce a successful stand following most spring-applied residual corn herbicides. If cereal rye is to be grazed or harvested for forage, there are some herbicide time-interval restrictions. (See Weed Control Guide for Field Crops in Resources.)
  • Seed purchase—Order cereal rye seed by early summer. Named rye varieties can produce substantially more growth and have predictable development, but they are usually more expensive than VNS (variety not stated) seed. Use good quality seed from a reputable seed dealer.
This cereal rye cover crop was planted after a corn silage harvest. (Kim Cassida)
This cereal rye cover crop was planted after a corn silage harvest. (Kim Cassida)
Fall Work
  • Corn silage harvest—Harvest fields where cereal rye is to be planted as early as possible.
  • Fall manure—It generally works best to plant cover crops following manure application via injection or surface application and incorporation. Manure can also be injected with a low-disturbance applicator after the rye cover crop is at least 4 inches tall. Other application methods into or onto established cereal rye may result in significant damage.
  • Field preparation—Cover crops can be integrated into all tillage systems. If tillage is necessary after corn silage harvest, it should take place prior to rye seeding.
  • Timing of planting—Plant cereal rye as soon as possible after corn harvest and at least two weeks before the average hard frost date (28°F). If planting later than mid-October, consider increasing the seeding rate.
  • Seeding rate—Seed at a rate of 40–60 lb./acre (assuming a germination rate of 85% or greater). Seeding rates should be increased by 10% if broadcasting with incorporation and by 20% if broadcasting only.
  • Planting method—Drill to a depth of 0.75–1.50 inches or broadcast with shallow incorporation to less than 1.50 inches. These two methods produce the most consistent stands. Aerial and other broadcast seeding are also options and can facilitate earlier establishment into standing corn with some risk. Overly wet or dry conditions after aerial/broadcast seeding may limit success. Harvest should be planned within two weeks of seeding.
  • Other fall operations—Surface applying potassium (K) or lime before the ground freezes will not harm cover crops under normal soil moisture conditions, although some damage may occur in the wheel tracks.
Spring Work
  • Termination timing—Terminate the cereal rye in the spring when plants are 6 to 12 inches tall and actively growing or at least 10 days before planting soybeans—whichever comes first. In a wet or windy spring, be ready to take advantage of any break in the weather and/or use low axle weight sprayers. Be familiar with the rules related to termination timing and crop insurance. (See NRCS Cover Crop Termination Guidelines in Resources.)
  • Termination methods—Cereal rye can easily be terminated with a full rate of glyphosate (1.13 lb. acid equivalent/acre) after the rye begins growing in the spring. Use best management practices for glyphosate to improve effectiveness. Effectiveness and rapidity of termination improves if rye is rapidly growing and air temperatures are consistently warmer (> 50°F). Cereal rye can also be terminated by tillage, although multiple passes may be necessary. Larger rye, rye past the boot stage, or rye sprayed during cooler weather can be more difficult to kill, may die more slowly, and could tie up available nitrogen (N), which is not likely a problem for soybeans as they receive nitrogen through symbiotic fixation. (See Cover Crop Termination in Resources.)
  • Option to harvest or graze cereal rye as a forage crop—Some growers may be interested in harvesting or grazing cereal rye as an additional forage crop. Growing cereal rye for forage requires a different management system. (See Recommended Hay and Pasture Forages for Michigan in Resources.) Make sure all herbicide rules are followed. Using cereal rye as a forage crop may delay the planting date for the next soybean crop.
  • Soybean planting—Proper planter adjustment and maintenance is critical to achieve success when planting into cover crop residue. When planting no-till, modern planter setups can handle planting into grass cover crop biomass. Row cleaner attachments can sometimes be beneficial to increase soil warming but may plug with cover crop residue if not set up properly. Check planting depth and seed furrow closure shortly after beginning to plant and adjust as needed.
  • Scouting after planting—Scout for soybean emergence, population, and insect pests after planting. Additionally, scout for weeds because substantial rye residue may delay emergence of annual weeds, which may then delay the application of post-emergence herbicides. (See 2020 Weed Guide Control Guide for Field Crops in Resources.)
Resources

Cover Crop Selector Tool  —available from Midwest Cover Crops Council

Recommended Hay and Pasture Forages for Michigan (Michigan State University Extension publication E-3309)

Weed Control Guide for Field Crops (Michigan State University Extension publication E-0434)

NRCS Cover Crop Termination Guidelines—available from the USDA–National Resources Conservation Service

Cover Crop Termination (Michigan State University Extension website)

Cover Crops, Manure, and Nitrogen Management (University of Wisconsin–Madison Extension publication A4178)

Authors

Dean Baas, Kimberly Cassida, Christina Curell, Sarah Fronczak, Paul Gross, Monica Jean, Phil Kaatz, and Elizabeth H. Schultheis, Michigan State University (Note: This publication was adapted with consent from MCCC under a joint project to produce customized introductory guidance about cover crops for all member states/provinces.)

Reviewers and Contributors

Boyd Byelich, USDA–Natural Resources Conservation Service; Erin Hill, Michigan State University; Eileen J. Kladivko, Purdue University; Anna Morrow, Midwest Cover Crops Council; and Maninder Singh, Michigan State University

The Midwest Cover Crops Council (www.https://www.midwestcovercrops.org) aims to facilitate widespread adoption of cover crops throughout the Midwest by providing educational/outreach resources and programs, conducting new research, and communicating about cover crops to the public.
Funding for this project was provided by McKnight Foundation.

August 2020

The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual’s income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA’s TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. ©2020 by MCCC. All rights reserved.

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The Midwest Cover Crop Council was first organized in 2006. Since its inception the organization has grown into a community that facilitates the sharing of cover crop knowledge within the Midwest and beyond.

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