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The behaviour of applied phosphorus and potassium in organic soil as indicated by soil tests and the relationship between soil tests, green-tissue tests and crop yields



The behaviour of applied phosphorus and potassium in organic soil as indicated by soil tests and the relationship between soil tests, green-tissue tests and crop yields



Proc. Soil Sci. Soc. Amer, 17: 279-283



A highly significant correlation exists between the amount of P and K applied to the soil and the amount extracted from the soil, determined by rapid-test methods. Applied P remained in the surface soil and K occurred at 12-18 inches. Periodic green-tissue tests showed a seasonal variation in the composition of water-extractable P and K in sugar beet and peppermint. Sugar beet contained 1800 ppm and peppermint 1000 ppm of K when the plants showed foliar symptoms of K deficiency.

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