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Articles by M. A. Hoque
Total Records ( 2 ) for M. A. Hoque
  A. B. M. S. Islam , M. Q. Haque , M. H. Rahman , M. A. Hoque and M. K. Alam
  The experiment was conducted at BINA net house with 17 extensively cultivated soils of Bangladesh to evaluate P extractability of four extractants and to determine its critical limit for chickpea. The soils were analyzed for P status by four extraction methods. The mean extractable P in soils was found to be in the order of Nelson > Olsen > Hunter > Bray. Influence of soil pH was the most dominant factor in P extraction. For the soils with low pH (<6.0), the amounts of P removed by different extractants except Bray-P were positively correlated with organic matter content whereas such correlation was negative for high pH soils (>6.0) indicating the stability of phosphorus organic matter complex formation at elevated pH. Dry matter yields were remarkably increased with addition of increasing rate of phosphatic fertilizer and the soils having low extractable P responded better to the applied P. In high pH soils, dry matter yield gave a positive relationship with extractable phosphorus. The P content and P uptake were also positively and significantly correlated with extractable P in these soils. In all and low pH soils, relative dry matter yield was positively correlated with extractable P, whereas such correlation was negative in high pH soils. The critical limit of soil extractable P for chickpea for Olsen, Bray, Nelson and Hunter extraction methods was found to be 14.0, 9.0, 23.0 and 11.0 (graphical approach) and 14.5, 12.5, 23.0 and 15.0 ppm (statistical approach) respectively.
  M. Uddin , M. M. Rahman , M. A. Hoque and S. Begum
  The field experiment was conducted in a silt loam soil to compare the effect of N, P and K fertilizers on the yield and nutrient uptake by rice and post-harvest soil properties. Seven treatments were T0 (control), T1 (Urea + Triple superphosphate + Muriate of potash), T2 (Urea + Diammonium phosphate + Muriate of potash), T3 (Urea + Triple superphosphate + Ash), T4 (Urea + Single superphosphate + Muriate of potash), T5 (Urea + Single superphosphate + Ash) and T6 (Urea + Diammonium phosphate + Ash). Application of fertilizers significantly increased the grain and straw yields of rice. Panicle length, effective tillers hill-1 and filled grains panicle-1 were also increased significantly due to application of fertilizers but the increase of 1000-grain weight was insignificant. Grain yield was highest with T3 (Urea + Triple superphosphate + Ash) treatment (5.46 t ha-1) which was followed by T1 (Urea + Triple superphosphate + Muriate of potash) treatment (5.30 t ha-1), while the lowest was in control. The grain yields were increased by 47.0 to 68.0% over control due to application of fertilizers. The results on straw yield reflected similar trend as in grain yield. Application of fertilizers caused a significant increase during NPKS uptake by rice. The application of fertilizers had a negligible influence on pH, CEC, organic matter, total N, available P, exchangeable K, and available S content of the post-harvest soils compared to their initial status.
 
 
 
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