Use of recycled sand as a corrective material for soil acidity in soybean crops

Acidity is one of the main factors capable reducing productive potential Brazilian soils, as it promotes release toxic elements for plants and reduces availability nutrients. Recycled civil construction demolition waste (R-CCW class A) a major environmental problem in cities, especially terms its illegitimate disposal, causing floods, clogging galleries silting channels, addition to proliferation vectors pollution. The objective this study was evaluate recycled sand (R-CCW) corrective soil acidity, through soybean cultivation, an experiment installed PVA1 yellow-reddish with sandy/medium texture, acid low fertility doses 10, 20 40% R-CCW, by mass, Fernandópolis/SP. Variables related that were subjected analysis variance F comparison averages Skott-Knott test at 5% probability evaluated. results obtained allowed us conclude from R-CCW A has favorable effects ability neutralize H+ ions solution those adsorbed negative charges, important acidity corrective, providing increases contents Ca, Mg, SB, CEC V%, greater development plants, which indicates use environmentally correct alternative disposal these residues.