Author (s): A. Rahman1, P. K. Biswas2, M. S. A. Sarder2 and M. I. K. Khan3
*Corresponding author’s E-mail:


The experiment was conducted at the Agronomy research field, Sher-e-Bangla Agricultural University, Dhaka from November, 2008 to March, 2009 to study the allelopathic effect of Brassica biomass on weed control and yield of wheat. The treatment of the experiment consisted of 3 factors as: 2 levels of field status viz. fallow land and field with Brassica; 2 levels of age viz. 25 days old Brassica and 35 days old Brassica; and 3 levels of Brassica biomass amount viz. 0 kg biomass m-2, 0.5 kg biomass m-2 and 1.0 kg biomass m -2. The highest grainyield was found from Brassica grown fields (2.68 t ha-1), 35 days old Brassica biomass (2.59 t ha-1) & 1.0 kg m-2 biomass application (2.71 t ha-1). The interaction effect of field status and Brassica biomass amount showed significant result on effective tillers linear m-1 (84.67), spike length (16.09cm), filled grain spike-1 (50.93), weight of 1000 grains (41.22 g), grain yield (2.83t ha-1) and straw yield (4.08 t ha-1). The highest thousand grain weight (41.84 g) was found from the field with 35 days old Brassica application @ 0.50 kg m-2. The maximum grain yield (2.86 t ha-1) was found from the field with 35 days old Brassica biomass application @ 1.0 kg m-2. Land with Brassica and application of 35 days old Brassica biomass @ 0.5 -1.0 kg m-2 increased yield contributing characters and yield of wheat.

Key words: Allelopathy, Brassica and Wheat

J. Expt. Biosci. 3(2): July 2012
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