The goal of the research subject to survey and assess the impact of activities taken to topsoil on physical-chemical properties, soil fertility and yield of rice in paddy field soil conditions takes away topsoil has in the Trans-American Soc. Besides, the measure used organic manure combination with chemical fertilizers as recommended to assess effectiveness in improving fertility much of the soil and the paddy yield on paddy field soil has tapped topsoil in the trans-American Soc and Chau Thanh-Tra Vinh
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