Research on Sustainable Cassava Cultivation Methods on Gray Soil in Gia Lai Province, Vietnam

Cassava is popular crop in many countries in over the world, and each area has particular cultivation method that suit with natural and socioeconomic conditions, special with properties of soil resources. The results from field experiments on gray soil at Gia Lai province, Vietnam, show that the formula of combination between chemical and organic fertilizer (manure or microbial fertilizer) are the most suitable and the measurement about height of plant, root diameter, weight and size of tubers, productivity, starch content are high. The cultivation methods to fight against erosion and to project of soil also show that the intercropping formula between cassava and legumes is the optimal choice for gray soil. After two years, soil physical and chemical properties are improved and weight of soil was lose by erosion decreased.