Buffer capacity as a method to estimate the dose of liming in acid soils

Objective: The study proposes using the dolomite buffer capacity (BCDolomite) as a method of estimating lime requirement in soils that agronomically require pH increase. Design/methodology/approach: In six soil samples with different levels response to application dolomite, organic matter (OM), content sand, silt and clay, pH, K, Ca, Mg potential acidity (Al+H) were determined. Assuming an apparent density 1000 kg/m3 volume per hectare 2000 m3, placed polyethylene containers treated doses equivalent 0, 750, 1500, 2250 3000 kg/ha, establishing BCDolomite inverse slope resulting from relationship between dose dolomite. Results: low clay OM was 280 26 g/kg, respectively, high soils, 240 47 respectively. all cases, simple direct linear observed (R2 > 0.85; p < 0.05) Limitations on study/implications: results obtained under controlled conditions show constitutes viable estimate requirement. Findings/conclusions: showed sensitivity complexity fraction soil, for which is equal product desired increase