Camargo, O.A. Valadares, J.M.A.S. Dechen, A.R. Efeitos do pH e da incubacao na extracao do manganes, zinco, cobre e ferro do solo The effect of pH and incubation in the extractable manganase, zinc, copper and iron contents of the soil Subjects--Topical Terms: PHMANGANESZINCOCOBREFERROSOLOSOLUBILIDADEMICROELEMENTO