Summary
Some relationship between climatological data, available water and saturated hydraulic conductivity of nine representative soil profiles of the low rio Negro, Amazon State region, were studied. The results shows a relatively low available water retention of all soils studied. A faturated hydraulic conductivity of 35 mm.h-1 was the mean value obtained. This means that rains with the intensity of 35 mm.h-1 or more, will be converted almost exclusively into run-off water.