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Articles by D.K. Biswas
Total Records ( 2 ) for D.K. Biswas
  D.K. Biswas , M.M. Haque , A. Hamid and M.A. Rahman
  A pot experiment was conducted to evaluate the gas exchange, leaf area dynamics and dry matter accumulation of blackgram varieties namely BARI mash 3 and BINA mash 1. The two blackgram varieties did not differ statistically in gas exchange characteristics, leaf area and dry matter accumulation over the growth stages. Blackgram showed highest photosynthesis rate at flowering stage, might be attributed due to higher leaf chlorophyll, higher stomatal and mesophyll conductance and lower intercellular CO2 concentration, but the highest respiration rate was found at pod filling stage. Leaves of top canopy showed highest gas exchange characteristics followed by the leaves of middle canopy and then bottom canopy. Diurnally, photosynthesis increased gradually with increasing intensity of light and peaked at around noon then decreases. Photosynthesis showed strong correlation with leaf area and dry matter accumulation of blackgram.
  M.A. Rahman , M.D. Hossain , M.S. Islam , D.K. Biswas and M. Ahiduzzaman
  Genetic variability, heritability and path coefficient analysis were studied in 24 genotypes of snake gourd. The genotypic coefficient of variation was high for fruit yield, number of fruits per plant, fruit length, stem length and flesh thickness. High to moderate heritability as well as genetic advances were estimated in fruit yield, number of fruits per plant, fruit length, stem length, flesh thickness and average fruit weight. Correlation studies revealed that fruit yield had significant positive correlation with number of fruits per plant, fruit length and stem length. The highest direct positive effect were recorded for number of fruits per plant. For selecting high yielding genotypes emphasis should be given on number of fruits per plant, stem length, fruit length and average fruit weight.
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