Steve Groff, farmer and the founder of Cover Crop Solutions, Pennsylvania, USA provides an excellent overview of cover cropping in the USA.
“by the mid-1960’s, cover crops were quickly becoming a distant memory”
Some interesting views of getting started, planting green, short season genetics, manures and cover crops, and interseeding.
10.2489/jswc.70.6.130A Journal of Soil and Water Conservation November/December 2015 vol. 70