Clay contains available nutrient elements.
粘土会有有用的营养元素。
Enhancement of soil available nutrient was highest in treatment 1, treatment 4 and 5 on the second place.
土壤中的有效养分的增加以处理1为最高,其次为处理4和处理5。
K fertilizer efficicency on various crops seemed to de relevant to N/K ratio in the available nutrient of soil.
不同作物施钾肥效高低似与土壤速效养分中N/K比值有关。
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