MCCC- Various contributors
May 2015
Sjoerd W. Duiker, Ronald J. Hoover, and Joel C. Myers – Pennsylvania State University
2013
Calibration of Grain/Seed Drills
Source link here.
Christopher Anderson, Diane Mayerfeld – University of Wisconsin
January 2012
Cover Crops Case Studies: Gary Sommers Farm
Source link here.
Rafiq Islam- Ohio State University; Alan Sundermeier- Ohio State University Extension
March 10, 2008
Source link here.