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[ 1 ] - مطالعه کانی‌‌شناسی رس‌ و نیز میکرومورفولوژی حفرات خاک‌های غرب استان گلستان و نقش آنها در درجه فراهمی پتاسیم

Studies on the soils of western Golestan province show that regardless of increased rain and presence of clay minerals with high cation exchange capacity, potassium extractable with ammonium acetate is low. In order to find the reason for this low amount of available K, clay minerals and micromorphology of the soil porosity were studied. Twenty disturbed and undisturbed samples from each horizo...