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Studies of the fertility of Spanish soils

, : Studies of the fertility of Spanish soils. An Edafol Y Fisiol Veg 9(5): 567-583

Comparison of Neubauer and ammonium acetate extract methods for determining available K for a number of virgin and cultivated Spanish soils showed a close correlation. Both total and acid soluble P was obtained for the same group of soils. A deficiency of K and P is shown for the virgin soils, while a general adequacy is reported for the cultivated soils.


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