Efecto de dos sistemas de labranza sobre la infiltración en suelos Ferralíticos Rojos.

Soil tillage induced soil´s compactation, reduce soil porosity, increase bulk density and as consequences, reduced soil´s infiltration capacity. In order to study the effect of two soil´s tillage methods in soil´s infiltration capacity, was carry out this work in a ferralitic red soil on the Agricultural Engineering Research Institute Experimental Station where there is under trials two tillage system; soil tillage using arrow plow and tiller (PM) and conventional tillage with mouldboard and disc ploughs (PC); in both plot were determined the soil infiltration using infiltrometers rings (three repetitions in each plot), soil water content was determined before the infiltration test and immediately and 24 hours after the test, were it was determined also soil bulk density, infiltration equations for each ring were determined using Kostiakov´s equation.Until 30 cm soil depth, soil bulk density (Bd) in treatment PM was lower than in PC, but at 40 cm soil Bd values were similar, in both cases the Bd values obtained were higher than typical values reported for this soils; Kostiakov´s equation parameters K and n from accumulated soil infiltration in PM (K =8,54, n= 0,788) and PC (K =7.49, n= 0,644) were significatively different (pË‚ 0.05), basic infiltration values were 0.56 and 0.43 mm min-1 for PM and PC respectively. The results showing the posibilities for increase water use efficiencies through the increase in soil infiltration changing the traditional soil´s working system to less soil´s intervention system. [ABSTRACT FROM AUTHOR]