Abstract
Abstract Potassium chloride was added at various rates to the surface of soil in columns in the laboratory. The soil used was representative of some of the coconut growing areas of Papua and contained a high level of exchangeable magnesium. The potassium was retained mostly within the top centimetre of soil. Increasing the amount of K applied resulted in some ions being moved further down the column. When the amount of leaching water was increased, K ions moved in decreasing amounts further down the column. No bulge of fertilizer ions occurred. The results suggested that loss of K by leaching would be negligible.
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