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Articles by A.T.M. Rafiqul Hoque
Total Records ( 2 ) for A.T.M. Rafiqul Hoque
  K.K. Islam , A.T.M. Rafiqul Hoque and M.F. Mamun
  A field experiment was carried out to investigate the effect of level of pruning on the yield and yield contributing characters of rice cv. BR11 (Mukta) under eight years old Sissoo (Dalbergia sissoo) tree in Boalmari Upazilla of Faridpur district, Bangladesh during the period from July to November, 2003. The level of pruning of Sissoo trees were designed as severely, moderately, medium and light pruned. Out of four tree-rice associations, severely pruned tree produced significantly highest yield (3.63 t ha-1) and lowest yield (2.70 t ha-1) was produced by light pruned tree, while control (out side the tree canopy) produced the highest yield as compared to all orientations. As regard to orientations, south orientation (OS) produced the highest yield (3.86 t ha-1) and north orientation (ON) produced the lowest yield (3.20 t ha-1) compared to that of control. Therefore, for tree-rice Agroforestry system, tree species having light canopy is suitable since they allow easy penetration of sunlight, while tree of dense canopy required heavy pruning especially in the north-east orientation.
  A.T.M. Rafiqul Hoque , Romel Ahmed , M.B. Uddin and M.K. Hossain
  Allelopathic effects of different concentration of water extracts of Eupatorium odoratum leaf on germination and growth behavior were tested by using some agricultural crops e.g. Cicer arietinum; Brassica juncea; Cucumis sativus; Phaseolus mungo; Raphanus sativus and Vigna unguiculata as bioassay material. The experiment was conducted in sterilized petridishes with a photoperiod of 24 h on average temperature of 28.50C. The effect of the different concentration of aqueous extracts was compared to distil water (control). The result revealed that different concentrations of Eupatorium odoratum leaf extracts caused significant inhibitory effect on germination, root and shoot elongation and development of lateral roots of receptor crops. Bioassays indicated that the inhibitory effect was proportional to the concentrations of the extracts and higher concentration had the stronger inhibitory effect whereas in some cases the lower concentration showed stimulatory effect. The study also revealed that inhibitory effect was much pronounced in root and lateral root development rather than shoot and germination.
 
 
 
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