Evaluation of maize yield in an on-farm maize-soybean and maize-Lablab crop rotation systems in the Northern Guinea savanna of Nigeria
Pakistan Journal of Biological Sciences
International Institute of Tropical Agriculture (IITA), Oyo Road, Ibadan, Nigeria; Department of Agronomy, University of Ibadan, Ibadan, Nigeria; Tropical Soil Biology and Fertility Institute of CIAT (TSBF-CIAT), P.O. Box 30677, Nairobi, Kenya; IITA, c/o
An attempt was made to solving the problem of shortfall of fertilizer to maize production in the Northern Guinea Savanna (NGS) of Nigeria by harnessing the potentials of legume/cereal crop rotation in on-farm trials. The yield of maize that succeeded two soybean varieties and Lablab in a two-cycle of soybean/maize and Lablab/maize crop rotation in NGS Nigeria was assessed in researcher-managed and farmer-managed plots. Though maize that followed the soybean received between 5 kg N ha-1 from improved soybean variety (TGx 1448-2E) and 17 kg N ha-1 from farmer soybean variety (Samsoy-2) as N balance, this did not significantly (p = 0.05) affect the maize yields. The soybean shed 90-100% of its leaves at physiological maturity which resulted in about 110 kg N ha-1 N uptake. This source of N might be one of the factors responsible for the increase in maize yield that followed soybean (20 to 24%) compared with continuous maize yield plot. Maize yield in previous Lablab plot was significantly (p = 0.05) higher than in all other treatments. Maize yield in farmer-managed plot ranged between 0.13 and 4.53 t ha -1, maize yield in researcher-managed plot was over 200% higher than maize yield in farmer-managed plot because of poor crop management on the part of the farmer. © 2007 Asian Network for Scientific Information.
nitrogen; agriculture; article; biological model; chemistry; crop; growth, development and aging; maize; metabolism; methodology; Nigeria; nitrogen fixation; soil; soybean; Agriculture; Crops, Agricultural; Models, Biological; Nigeria; Nitrogen; Nitrogen Fixation; Soil; Soybeans; Zea mays; Glycine max; Lablab; Zea mays