Weed management in organic rice production

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Rice is the staple food for millions of people in the Asia-pacific region; 90% of the world’s rice is grown and consumed in Asia. The indiscriminate use of chemicals in the rice environment thus polluting the fragile system has created an increasing awareness and interest among the rice farmers on organic farming. Weed infestation is regarded as one of the major causes of low crop yields throughout the world and can cause 50-60 % reduction in grain yield under puddle conditions and 91% yield reduction in non-puddled conditions. Organic weed control encourages weed suppression rather than elimination. This is done by promoting soil health through a combination of crop rotation, cover crops, biologically based bio-fertilizers, compost and mulch. Proper management through organic methods offer varied benefits over chemical herbicides, including increased biodiversity, improved soil nutrition and structure, and protection of ground and surface water. The present research work is aimed to confirm this possibility in weed control and evaluate the influence on yield performance in organic rice farming system employing non-chemical weed management practices.