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The acidity correctives have the objective to neutralize toxic aluminium and the hidrogen, and supply calcium and magnesium for the development crops. In no tillage, limeston has been applied superficially. However, the ideal form of limestone application for Sandy soil is questioned. The objective of this paper was to compare the efficiency of dose and forms of liming in na Oxisol or northwest of Parana. The experiment was implemented at UEM, Umuarama PR campus. An Oxisol was used as an experimental base. For the development of the experiment, it were used PVC columns that were filled by Oxisol. The treatments consisted of the superficial and incorporated application of lime to raise the V up to 50, 60, 70 and 80%, in addition to treatment without lime. Soybeans were grown in columns for 114 days, when the pH-CaCl2, Al , phosphorus and potassium were evaluated in the soil (0-10 cm). The built-in and superficial limestone was equally efficient in raising pH-CaCl2 and reducing Al. For the highest limestone doses, the pH increases excessively, above 6.0. Incorporated an surface liming increased P and K, achieving the best availability with liming to raise bases saturation up to 60%. The highest doses of limestone (to raise V up to 70 and 80%) reduced the levels of P and K.

brazilian journal of animal and environmental research

Correção da acidez e disponibilização de fósforo e potássio em latossolo vermelho distrófico típico submetido à calagem incorporada e superficial / Correction of soil acidity and availability of phosphorus and potassium in an oxisol submited to surfaced and incorporated liming