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《Science and Technology of Tianjin Agriculture and Forestry》 1991-01
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Study of Adjust Technique of Soil Acidity in a Nursely Plate for Rice

In Tianjin area study of adjust technigue of soil acidity in a nursely plate and production practice show that: ①Adjust of soil acidity. can improve the quality of seedling obviously and prevent it from seedling rot. ② In Tianjin area the seedling will grow more strongly. if the soil acidity is adjusted to PH value about G of soil. ③using efflorescenced coal as an acid adjuster and adding it to soil by 12%~15%. The PH value of soil can be adjusted to 6~6.5.
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