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Articles by M.A. Karim
Total Records ( 2 ) for M.A. Karim
  M.U. Kulsum , M.A. Baque and M.A. Karim
  This study was conducted to evaluate the performance of blackgram (Vigna mungo L) under various levels of nitrogen at the Agronomy Research Site of Bangabandhu Sheikh Mujibur Rahman Agricultural University during March to June 2002. Two varieties of blackgram- BARI mash 3 and BINA mash 1 and six levels of nitrogen i.e., 0, 20, 40, 60, 80 and 100 kg N ha-1 were the treatment variables. Different morphological characters including grain yield were affected significantly by the nitrogen levels. The longest plant was measured with 100 kg N ha-1 whereas largest leaf area was obtained with 80 kg N ha-1. BINA mash 1 was longer than BARI mash 3. Yield and yield contributing characters were affected significantly by different levels of nitrogen. The highest grain yield was obtained with 60 kg N ha-1 in both the varieties, thereafter the grain yield declined. Application of 60 kg N ha-1 favored most of the yield contributing characters that contributed the maximum grain yield production at this level of N. Between the two varieties of blackgram, BARI mash 3 out yielded BINA mash 1 at all levels of nitrogen. It was obvious that grain yield of blackgram can be increased substantially with the judicious application of N.
  M.E. Kabir , M.A. Karim and M.A.K. Azad
  It is established that salinity disturbs mungbean plant growth by creating nutrient imbalance and disturbance in plant water relations. This study was undertaken to observe whether external application of K mitigates the harmful effect of salinity. Mungbean plant (var. BARI mung 3) was grown in pot at three levels of K viz. 14, 40 and 60 kg ha ha-1 under 0 and 75 mM NaCl saline conditions. Salinity decreased seriously relative water content and water retention capacity, while increased water saturation deficit and water uptake capacity. Salinity also decreased xylem exudation rate and leaf water potential. Application of higher amount of K improved the plant water relationship in mungbean plant. Salinity disturbed dry matter distribution in different plant parts as well decreased total dry matter. Similarly yield and yield contributing characters were also seriously affected by salinity, except number of seeds per pod. Application of different levels of potassium did not influence on dry matter production. However, yield and yield contributing characters were improved to some extent with the increasing levels of K. Salinity decreased significantly the uptake of N, P, K and Ca, while increased Na uptake several fold. Mg accumulation was unchanged due to salinity. K doses had no significant influence on nutrient uptake by mungbean plant, though the uptake of most of the nutrients showed an increasing tendency with the increased levels of K application. It was concluded that application of higher levels of K improves water relations as well as growth and yield of mungbean under mild level of saline conditions.
 
 
 
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