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Baseline soil characteristics of a humid tropical silvopastoral system and changes in selected soil properties
(IICA, San José (Costa Rica), 1993-01)
We established fast-growing leguminous trees (Erythrina berteroana Urban) in native grass pastures in Costa Rica's Atlantic region to determine the effects of tree pruning and cattle grazing on soil phosphorus availability ...
Phosphate desorption from some argentine soil samples. I. Constant temperature
(IICA, San José (Costa Rica), 1993-10)
Se estudia la desorción de iones-fosfato en cuatro muestras de suelos argentinos y se analiza la cinética del proceso. Se postula la existencia de dos tipos diferentes de iones fosfatados adsorbidos, uno correspondiente a ...