1. Weed-Crop Ecology: Principles in Weed Management;Aldrich,1984
2. Competition between Setaria viridis (green foxtail) and wheat at two fertilizer levels;Alex;Res. Rep., Can. Nat. Weed Comm., West Sect.,1967
3. Common cocklebur competition in soybeans;Barrentine;Weed Sci.,1974
4. Competition of wild oat in wheat and barley;Bell;Weed Sci.,1968
5. Wild oats cost more to keep than to control;Bell;N. Dakota Farm Res.,1967