Micronutrient cation relations of 'Tabuleiro' soils of northeast Brazil

TL;DRAbstract

This study was conducted with samples taken from two depths of two Brazilian soils from the "tabuleiro" of the state of Pernambuco, and the surface soil of Blodgett series of western, Montana.The tab uleiro soils are from very level areas which would be advantageous for agricultural development, but the soils are very sandy, highly leached and extremely infertile.Micronutrient cation deficiencies are common in these soils, and detailed studies had not been made to determine the chemistry and fertility relations of these elements in tabuleiro soils.The Blodgett soil represents a common soil from Western Montana, but one of relatively low fertility.Determinations of the retention and leaching of copper and zinc, were conducted.Results indicated that both elements were readily retained by the top soils, and this retention was two to three times greater than that of subsoils.The Sao Jose soil retained more copper and zinc than the Ubu soil at comparable depths.The organic fractions retaine

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