4.The length of the average grain when grown sprouts green beans in the soil clay and sandy soils induced ruan found that soil has a value of ruan length accounted for 55%.Clay is 46%, and the minimum length is 23%, sandy soil. And also found that the rate of growth, measured from the number of seed germination percentage of green beans, which grow all. Clay, rate of growth, the best The soil is sandy and ruan.
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