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为配合世界粮食计划署在广西象州县３７３０项目改土工程进行了５年监测试验。试验结果表明：深耕提高了土壤耕层厚度，但耕层有机质和有效养分的含量下降，无增产效果；施有机肥提高了耕层有机质和有效养分的含量，增产效果显著，年均增产１．２２８ｔ／ｈｍ２；深耕结合施有机肥对耕层厚度，有机质和有效养分含量均有显著提高，年均增产１．１８５ｔ／ｈｍ２，与对照差异显著，与单施有机肥差异不显著。
To meet the World Food Program in Guangxi Xiangzhou 3730 project for soil improvement project conducted a five-year monitoring test. The results showed that the deep plowing improved the thickness of soil layer, but the content of organic matter and available nutrients in the plow decreased without increasing yield. Organic manure increased the content of organic matter and available nutrients in plow layer, and the yield increase was remarkable with an annual increase of 1%. 228t / hm2. With the combination of organic manure and deep tillage, the topsoil thickness, organic matter and effective nutrient content increased significantly with an average annual increase of 1.185 t / hm2, which was significantly different from the control. There was no significant difference with organic manure.