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Articles by M.A.H. Chowdhury
Total Records ( 2 ) for M.A.H. Chowdhury
  M.A.H. Chowdhury , R. Begum , M.R. Kabir and H.M. Zakir
  Microbial respiration (CO2 evolution),inorganic SO4-S and available P were monitored in a S deficient soil amended with dhaincha, cowdung and rice straw @ 1 g per 50 g soil during 30 days incubation. A basal dose of 250 μg N, 200 μg P and 250 μg K g -1 soil was applied. Dhaincha showed the highest decomposition rate and rice straw showed the lowest rate, while that of cowdung was intermediate. After 30 days of incubation, 53, 17 and 39% C was decomposed from cowdung, rice straw and dhaincha, respectively. Decomposition was also found to be related to its nutrient status (C:N:S ratio). Considerable S mineralization was recorded in dhaincha and cowdung amended soil and attained the maximum at 15th day (13.8 μg g -1S) and 30 (9.8 μg g -1 S), respectively. During rice straw decomposition S was immobilized markedly. Application of plant and animal residues caused significant increase in P mineralization. Net mineralization was 95.5, 87.6 and 50.8 μg P g -1 soil in dhaincha, cowdung and rice straw amended soil, respectively.
  H.M. Awlad , M.A.H. Chowdhury and N.M. Talukder
  The effect of sulphur (S) and zinc (Zn) on nodulation, dry matter yield, nutrient content of soybean cv. Shohag (Pb-1) was studied during December, 2001 to March, 2002. The levels of S and Zn employed were 0, 10, 20, 30 and 50 kg S ha-1 and 0, 2.5, 5, 10 and 20 kg Zn ha-1, respectively. The results indicated that among the S treatments, S30 gave the highest number of nodules plant-1 mostly at the later stages of growth though the effect was not significant. Zinc also did not show any significant influence on nodulation of soybean. The highest number of nodules were obtained from Zn20 at 90 (DAS). Dry matter yield at different growth stages were significantly affected with the increasing levels of S and Zn application. Sulphur and zinc contents were also significantly increased with the increasing levels of S and Zn up to 30 kg S and 20 kg Zn ha-1 in most of the growth stages and then decreased with higher levels of S.
 
 
 
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