References in periodicals archive ?
[19.] Federal Procurement and Distribution Division (FPDD)-Fertilizer use and Management Practices for Crops in Nigeria 1989; Enwenzor WO, Udo EJ, Usoroh NJ, Ayotade KA and JA Adepetu (Eds).
Federal Ministry of Agriculture, Water Resources and Rural Development (FPDD), 1990.
Exchangeable bases, CEC, total N, organic matter and available P were generally low compare with the nutrient critical level for arable crops recommended by FPDD, (1989).