The problem of soil degradation because it does not have to convert the business and improve the soil. It also causes the problem of rice weeds because farmers need to accelerate land preparation, planting, rice is not that good. The problem of disease and insect pests, especially leafhoppers, had a distinctive Brown RA. Grain quality issues because the rice standard is insufficient. The problem of rice destroyed ecological systems. There is a large amount of chemicals used. Make rice high production costs and a cause of global warming.
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