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Articles by M. Q. Haque
Total Records ( 2 ) for M. Q. Haque
  M. Q. Haque , M.H. Rahman , Fokhrul Islam , Jan Rijpma and M.M. Kadir
  A field experiment was conducted to study the effect of continued fertilizer, organic manure and mungbean residues on soil properties and yield of crops. The grain and straw yield of wheat, mungbean and T.aman were significantly influenced by different treatment combinations of organic and inorganic fertilizations. The highest average grain yield of Wheat var. Kanchan was 4.92 t ha-1 in the treatment T4 (N125, P25, K85, S25, Zn5, Mg20 and B2 kg ha-1). For mungbean (var. Binamoog-2) the highest grain yield of 1.06 t ha-1 was obtained with inoculum + (P10, K12 and S4 kg ha-1). The yield of T.aman (var. BRRI Dhan-32) was significantly increased when inorganic fertilizers were applied along with incorporation of mungbean stover. The highest average grain yield of rice 5.81 t ha-1 was recorded with N105, P16, K60 and S8 kg ha-1 + mungbean stover. The residual effect of cowdung and incorporation of mungbean straw as brown manure along with inorganic fertilizer was distinct. Economics of the fertilizer uses of the total products of two cropping cycles demonstrated that the highest net benefit of US $ 1998 ha-1 was obtained from treatment T3.3 (inorganic fertilizer for moderate yield + cowdung). There was no remarkable change in post harvest soil status during the period of study. However, there were considerable increase in available P but in case of K, the amount of K removed far exceeded that replenished through fertilization.
  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.
 
 
 
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