Here are some excellent sources for further information and research.
TED has many links to videos that can provide good information and insight. Maybe not all of them will be of any use to you, but there are several about holistic management, plant communication of environmental stresses, insects, new technology, etc.
Science & Technology Training Library has a host of webinars dealing with cover crops, soil health and many other issues that you might find useful.
Conservation Technology Information Center is another good site to gain information on cover crops and conservation systems.