Infiltration rates were monitored at 2 sites per plot before initiating the experiment and during the dry season every year thereafter. Infiltration rates were measured using a double-ring or flooding type infiltrometer. These were made of two concentric rings. The inner ring was 30 cm in diameter and was pushed into the soil for about 15 cm. The outer ring was about 40 cm in diameter and was pushed into the soil for about 20 cm.