Abstract
The experiment was conducted at Agricultural field laboratory in Noakhali Science and Technology University during the period from mid-January 2019 to 1st week of May 2019, to find out the growth, nodulation, and yield performance of soybean cv. BARI soybean 6 under different weeding regimes. The experiment consists of four treatments viz. T0 (No weeding), T1 (Weed free), T2 (Two hand weeding at 15 DAS and 30 DAS) and T3 (Three hand weeding at 15 DAS, 30 DAS and 45 DAS). The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Characters like plant height, number of pod plant-1, number of effective pod plant-1, number of non-effective pod plant-1, number of seed pod-1 and yield varied significantly among the different weeding regimes. The highest seed yield (1.275- ton ha-1) was recorded at T1 (weed free) and the lowest seed yield (0.903-ton ha-1) was observed at T0 (No weeding) condition. The economic analysis of the treatments showed that farmers will be better off by adopting two weeding regimes and weeding at 15 DAS and 30 DAS is therefore recommended for high income.
 Res. Agric., Livest. Fish.8(2): 193-199, August 2021
Highlights
Soybean is an important source of food, protein, and oil, and more research is essential to increase its yield under different conditions, including stress
Out of the total cropped areas of 14.418 million ha, oil crops occupy about 0.366 million ha and the total production of the country stands at 0.786 million tonnes
Different weeding regimes had a great impact on the nodulation and seed yield of soybean
Summary
Soybean is an important source of food, protein, and oil, and more research is essential to increase its yield under different conditions, including stress. Weeds compete with crops by resources (water, light, and nutrients) This competition is important mainly in the initial stages of crop development, due to possible losses in production that can be up to 80% or even, in extreme cases, hinders harvest operations. High number of seeds, seed dormancy, discontinuous germination, effective dispersal mechanisms and population heterogeneity, are very important for weed establishment during crop development. During this phase, weeds may rapidly capture resources and occupy space; this is often linked to their competitive ability, because rapid growth requires the prompt and efficient conversion of resources into biomass. Considering the above facts present study was undertaken to find out the effect of different weeding regimes on growth, nodulation, and yield of soybean
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