| Popis: |
Seedbed preparation is difficult for hoe farmers because hoes make inefficient tillage instruments. Test were made in sorghum and millet fields in northern Nigeria to evaluate glyphosate and paraquat as substitutes for seedbed preparation by tillage. These chemicals were applied at rates of 0.5, 1.0 and 2.0 kg a.i./ha, in the period between weed and crop emergence. All treatments except 0.5 kg a.i./ha of paraquat gave acceptable yields. Glyphosate applied at a rate of 0.5 kg a.i./ha and paraquat at 1.0 or 2.0 kg a.i./ha, gave rise to similar crop yields. Sorghum grain yield after treatment with 1.0 kg a.i./ha of glyphosate was not significantly different from that obtained in hoe‐tilled fields. The addition of 0.5 kg a.i./ha of atrazine to some treatments did not result in improved crop yield or weed control. |
