“Tillage and Weed Control Practices for Upland Rice (Oryza Sativa L.) on a Hydromorphic Soil in the Guinea Savanna of Nigeria”. Tropical Agriculture 66, no. 1 (January 30, 1989). Accessed February 12, 2025. https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/1805.