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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/9442

Title: Effect of crop rotation and nitrogen fertilization on yield and nitrogen efficiency in maize in the northern Guinea savanna of Nigeria
Authors: Yusuf, A. A.
Iwuafor, E. N. O.
Abaidoo, R. C.
Olufajo, O. O.
Sanginga, N.
Keywords: Fallow
Grain legumes
N uptake
N use efficiency
N fertilizer recovery efficiency
Issue Date: Oct-2009
Publisher: African Journal of Agricultural Research
Citation: African Journal of Agricultural Research Vol. 4 (10), pp. 913-921, October, 2009
Abstract: Two crop rotation cycles were evaluated to determine the effect of cropping systems and N fertilization on the yield and efficiency of N in maize. Maize was grown on plots which had previously supported monocrops of two genotypes each of soybean (TGx 1448-2E and SAMSOY-2) and cowpea (IT 96D-724 and SAMPEA-7), natural fallow and maize. In a split-plot experimental design, three N fertilizer rates (30, 60 and 90 kg ha-1) and an unfertilized control were compared. On average, maize following legumes had higher grain yield of 1.2 and 1.3-fold compared with maize after fallow or maize after maize respectively. Similarly, legume rotation resulted in significant increase in total N uptake compared to continuous maize. In both years, N agronomic efficiency (AEN) and N fertilizer recovery efficiency (REN) of maize following grain legumes were on average 14 and 34% greater than of maize following maize and 12 and 20% greater than of maize following fallow respectively. On the other hand, all N efficiency indices except N physiological efficiency significantly decreased with increasing N levels. These indicate greater N use efficiency for the legume-rotation and poor efficiency for maize monoculture as well as the inefficiency of the current method of N fertilizer application
Description: An article published by African Journal of Agricultural Research Vol. 4 (10), pp. 913-921, October, 2009. Available online at http://www.academicjournals.org/AJAR
URI: http://hdl.handle.net/123456789/9442
Appears in Collections:College of Science

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