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handle: 10261/36401
[ESP] -Se estudia la necesidad de cal en 166 suelos de la provincia de Salamanca dedicados al cultivo de pastos, siendo el valor medio encontrado de 9.5 Tm./Ha. de CO3Ca. Dichos suelos, son ácidos con un valor medio de pH de 5.63; de contenido medio en materia orgánica de 3.18 U y una textura ligera con valor medio de arcilla de 17.4 %,. Son bajos en Calcio, con un valor inferior a 1.000 ppm de CaO para el 62.6 % de los suelos estudiados. Hay correlación muy signiiicativa entre la necesidad de cal y el contenido en materia orgánica, arcilla, pH e índice de amortiguación, siendo no significativa la correlación con el Calcio.
[ENG] The lime requirements of 166 pasture soils of the Salamanca province have been studied, the mean value found being 9.5 t/ha of CaCO3. These soils are acid, with a mean pH value of 5.63; they have a mean organic matter content of 3.18 % and light texture, with a mean clay content of 17.4 %. They have low Calcium content. 62.6 % of them having less than 1.000 ppm of CaO. The buffering capacity is weak, with a mean index of 2.84. There exists a very significant correlation between the lime requirement and the organic matter and clay contents, pH and buffering index. The correlation with Calcium is not significant.
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