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Jun 16 2010

Annual Ryegrass…leading the new frontier of cover crops

hand with ARG roots
Annual Ryegrass has very deep, fibrous roots.

Annual Ryegrass is one of the more popular and also one of the more vilified of the cover crops.  Those that love it cite the deep fibrous roots and excellent soil tilth improvement.  Those that loathe it cite that it does not always survive the winter…or that they can’t kill it if it does!

Thankfully there are a few very good winterhardy varieties on the market and the method of killing annual ryegrass is becoming more refined and dependable.  Annual Ryegrass has many benefits and a few disadvantages.  I list them below.

Advantages of Annual Ryegrass:

  • It is a deep rooted cover crop that helps mine minerals from deep in the soil profile.
  • It is an excellent erosion control crop.
  • It is a luxury consumer of nitrogen and tremendous scavenger of N.
  • It works well aerial applied into corn and soybeans.
  • It also makes an excellent forage crop.
  • Corn following annual ryegrass often yields more and is more drought tolerant due to  depth of roots and holding N in the soil from previous fertilizer applications.
  • Excellent with manure applications…holds N in soil profile, out of tile drains.
  • And more…

Disadvantages of Annual Ryegrass:

  • Many varieties are not winterhardy (many rarely make it through the winter alive).
  • It may be difficult to kill in the spring.
  • It takes more management than many other cover crops.
cover crop 2010 044
Annual Ryegrass in the spring of 2010. Planted in 15" rows, this erosion fighting cover crop was a huge success.
cover crop 2010 040
The root structure on Annual ryegrass is impressive. Even when planted in 15" rows the roots filled in between the rows.

Written by Dave Robison · Categorized: Annual Ryegrass, Types of Cover Crops · Tagged: advantages of annual ryegrass, Annual Ryegrass, cover crops, disadvantages of annual ryegrass

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  1. bokashicomposting.com - Short Cover Crops Put Down Deep Roots says:
    November 30, 2011 at 10:36 am

    […] up dozens of cover crop plants.  One of my goals in the field is to measure roots on species like annual ryegrass, cover crop radishes, oats, cereal rye, Austrian winter peas, rape, kale, cowpwea, Hairy Vetch, […]

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