Common Bean Grain Yield As Function As Lime and Silicate Application.

The accumulation of crop residues and fertilizers on the surface in no-tillage system accelerates the process of soil acidification. This process, continual in tropical soils, leads to low nutrient availability and high levels of Al+3. In conventional soil management, as well as in no tillage system it is necessary to apply inputs, especially, to correct acidity. Thus this research aimed at assessing the influence of  surface application of correctives on common bean grain yield in a no tillage system in regions of dry winter. The experiment was carried out in Botucatu, Sao Paulo State, Southeastern Brazil. The plots consist of two sources of acidity corrective and a control (I - Correction with dolomitic lime; II - Correction with calcium and magnesium silicate; III - No correction). The design was a randomized blocks with eight replications. The evaluations were: macronutrient and silicon foliar levels, yield components and grain yield of common bean (Phaseolus vulgaris L.). The surface application of silicate increased the silicon foliar levels. The surface application of both sources of acidity correctives increased Ca and Mg foliar levels, the number of pods per plant and grain yield of common bean.