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Celem badań było określenie wpływu nawożenia mineralnego N, P, K i wapnowania na zawartość glinu wymiennego w glebie. Badania prowadzono w oparciu o trwałe doświadczenia polowe w Skierniewicach, założone w 1923 r. Próby gleby do badań pobrano jesienią 1998 roku, z trzech poziomów genetycznych: Ap (0-25 cm), Eet (25-45 cm) oraz Bt (45-70 cm) trzech powtórzeń pól: A1 (Obiekty: O, CaNPK, NPK, PK, PN,...
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