Tillage and weed control practices for upland rice (Oryza sativa L.) on a hydromorphic soil in the Guinea savanna of Nigeria
1989
Olofintoye, J.A. (Ilorin Univ. (Nigeria). Dept. of Crop Protection)
In 1985-1986, the effects of no-till, minimum and conventional tillage practices and 3 weed control methods on weed growth, yield and yield components of upland rice were evaluated on a hydromorphic soil in a low-rainfall region of Nigeria. The weed control methods were handweeding or herbicide application 15 and 40 days after planting and chemical control including pre-emergence treatment. Plant height and tillering at early growth stages of the crop were lower in no-till than in conventional and minimum tillage plots. The 3 tillage practices produced similar grain yield, weight of 100 grains, panicle number and number of filled grains per panicle. Higher weed yields were recorded than in the conventional and minimum tillage treatments. The herbicides used effectively controlled weeds under the 3 tillage practices and were comparable with 2 hand weedings. Results indicate that herbicides hold promise for weed control in tilled and untilled upland rice cultivation
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