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Articles by I.U. Abubakar
Total Records ( 2 ) for I.U. Abubakar
  A.G. Adesoji , I.U. Abubakar and D.A. Labe
  An economic analysis was done using the partial budget procedure to evaluate economic performance of maize (Zea mays L.) under incorporated legumes and nitrogen in Northern Guinea Savanna zone of Nigeria. Results showed that plots without nitrogen fertilizer produced maize at loss throughout the three years of study and their average data except in 2006 where a very little profit was made. Maize production using 120 kg N ha–1 gave the highest gross margin and profit per naira (₦) invested throughout the three years of study with an exception of 2005 where there was a loss. However, in the three year average data, application of 90 kg N ha–1 in maize production gave the best profit per naira (₦) invested, which made incurring of extra cost of 30 kg N ha–1 from application 120 kg N ha–1 of no benefit. The most profitable green manure method for maize production was lablab green manure which gave the highest gross margin and profit per naira (₦) invested. When using nitrogen fertilizer and green manure on maize production was compared, incorporation of any of the legumes was better economically than any of the nitrogen levels. The results of this study suggest that using incorporated legumes in maize production was more profitable than using nitrogen fertilizer.
  A.G. Adesoji , I.U. Abubakar and D.A. Labe
  A three year study was conducted in the rainy seasons of 2005, 2006 and 2007 at the Research Farm of the Institute for Agricultural Research, Ahmadu Bello University, Zaria, Nigeria, to evaluate character association and path coefficient analysis of maize (Zea mays L.) grown under legume incorporation and nitrogen. The results of this study showed that maize grain yield correlated positively and significantly with all measured characters. Path coefficient analysis indicated that plant height, total dry matter per plant, crop growth rate, cob length, number of grains per cob, 100-seed weight and stover yield showed positive direct effects on grain yield. Plant height and total dry matter per plant and 100-seed weight and stover yield gave the largest combined contributions. In growth characters, the highest individual contributions to grain yield were made by total dry matter per plant and crop growth rate. In yield characters, the highest individual contributions to grain yield were made by 100-seed weight and stover yield. Conclusively, total dry matter per plant, crop growth rate, 100-seed weight and stover yield should be considered for selection criteria in improving these varieties for better yield.
 
 
 
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