Haku
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Effect of different rates of P fertilization on the yield and P status of the soil in two long-term field experiments
(Suomen maataloustieteellinen seura, 1989)
Effect of extractant pH on the release of soil phosphorus, aluminium and iron by ammonium fluoride
(Suomen maataloustieteellinen seura, 1989)
Release of phosphorus, aluminium and iron in fractionation of inorganic soil phosphorus
(Suomen maataloustieteellinen seura, 1987)