Natural Resource Conservation Service
May 1999
Sunn Hemp a Cover Crop for Southern and Tropical Farming Systems
Source link here.
Charles W. Marr, Rhonda Janke, Paul Conway – Kansas State University
November 1998
Cover Crops for Vegetable Growers
Source link here.
Purdue University Center for New Crops and Plant Products – Contributors: F.J. Muehlbauer and Abebe Tullu
1997
Lathyrus sativus (Chickling Vetch)
Source link here.