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Weeding

Weeds decrease yield by direct competition for sunlight, nutrients and water, increase production costs and reduce grain quality and price. Weed control (weeding) is important to prevent losses in yield and production costs, and to preserve good grain quality. First weeding operation in this experiment was performed 2 weeks after transplanting by labor force. No chemical herbicides have been used to control weed populations. Due to the lack of use of chemical herbicides as well as the application of different levels of irrigation intervals as experimental treatments, the possibility of weeds growth has increased, so weed control will done during the growing period of the rice plant with continuous daily and weekly visits to the experimental field. Some gap filling was done simultaneously with the first weeding operation by labor force.