Cover crops in soil health
The Cornell Soil Health Team is working to provide tools to assess soil health. These assessments let growers identify the improvements in soil management that would have the most impact.
The report from the soil health test provides prescriptions for ways to correct the deficiencies that the test identifies. Several of the prescriptions are to use cover crops. This site is intended to help fill those prescriptions. The following is a list of management goals and what you would look for in a cover crop to address them.
Protect soil from rain or runoff
Broad leaves to intercept rain
Robust root system to hold surface soil
Rapidly establishing smother crops
Improve soil aggregate stability
Active exudation of glues and fungus food from roots
Root-surface fungi that produce aggregate glues
Reduce surface crusting
Shallow, fibrous root system
Add active organic matter to soil
High biomass with mixture of quickly and slowly-decomposing parts
Deep roots that swell during growth
Legumes with high biomass and active fixation in farm fields.
Scavenge soil nitrogen
Active growth in fall and good nitrogen storage over winter.
Suppress soil diseases and pests
Support beneficial soil microbes
Produce suppressive compounds
The Soil Health Manual has information on measuring your soil’s condition. It includes information on the Cornell Soil Health Test sample collection and its interpretation. It also takes advantage of the Cornell Soil Health Team’s new diagnostic tool for determining which aspects of soil health need improvement.