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Articles by A. Abubakar
Total Records ( 3 ) for A. Abubakar
  A. Abubakar , H.M. Tukur , A.A. Sekoni and W.A. Hassan
  A total of 120 birds were divided into 5 groups of twenty four birds each. Each group was regarded as treatment. The treatment was subdivided into 3 groups of 8 birds each as replicates. Treatment 1 served as control diet with no rice bran and yeast supplementation, diet 2 and 3 contained 30 and 35% rice bran without yeast supplementation, respectively. Diets 4 and 5 were the same as diets 1 and 2 except that 2 g kg-1 of yeast was added to each. Between 45th and 50th week of age of the birds egg quality trial was conducted to assess haugh unit, shell thickness and yolk index. Results of feed intake, hen day egg production, feed conversion ratio and mortality were not significantly (p<0.05) influenced by dietary treatments. Haugh unit, yolk index and average weight of egg did not vary significantly (p<0.05) between treatments, however, shell weight and shell thickness were significantly affected by the treatments. Total cost of production was higher (p<0.05) for the control group compared to treatments 2, 3 and 5. Revenue generated from sale of eggs was higher for birds on treatment 4 compared to those on treatments 1 and 5 (p<0.05). Net farm income was higher for treatments 2, 3 and 4 compared to the control. It could be concluded from the results of this study that performance of birds was not affected by the levels of rice bran with and without yeast supplementation. However, shell thickness, shell weight and net farm income were significantly affected by the treatments.
  O.A. Taiwo and A. Abubakar
  This study presents the application of collocation methods for the solution of second order nonlinear ordinary differential equations. Newtion’s linearization scheme is used to linearize the non-linear problems and the linearized problem leads to the use of iterations. Two collocation methods used in this study are standard and perturbed collocation by chebyshev polynomials. Numerical computations are carried out to illustrate the application of the methods and also, the methods are compared in terms of accuracy and computational cost.
  B.H. Kabura , P.E. Odo and A. Abubakar
  An experiment to evaluate the performance of five different varieties of tomato (Lycopersicon esculentum Mill.) under heat period was carried out at Maiduguri, Nigeria. The 5 varieties used were, Dan-Syria, Roma VFN, UTC, Dan-Baga and Tandino which were arranged in a Randomized Complete Block Design (RCBD), with three replications. The varieties varied in their yield characteristics. The varieties Roma VFN and Tandino started flowering 40 Days After Transplanting (DAT) earlier than the other varieties used. The Roma VFN, generally, produced significantly (p ≤ 0.05) greater number of fruits/plant and fresh weight of fruits/plant than the other varieties used. Consequently, the Roma VFN, produced the highest fresh fruit yield of 6.1 mt ha-1. The variety Dan-Baga produced the lowest fruit yield/ha, which was 2.6 mt ha-1. The results of the study suggest that among the varieties used in the experiment, Roma VFN was more tolerant to heat followed by Tandino which surpassed the rest.
 
 
 
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