Clair Keene, a researcher at The Pennsylvania State University, and her colleagues wanted to find the perfect time to crimp-kill a cover crop: grown long enough to make biomass adequate to suppress weeds, but not far enough along to make seeds.
Soils and Organic Fertility Management
This presentation, from the Oklahoma Beginning Farmer and Rancher Program, discusses the management of soil fertility under organic regulations. It briefly reviews basic soil chemistry and organic matter, discusses soil microbiology, and explains allowed sources of each major plant mineral nutrient, including a detailed overview of cover crops.
Author: Warren Roberts, George Kuepper