Effect of Clay and Humicmaterials for the control of nitrate leaching from sandy agroecosystem

Abstract

The effect of clay and humic materials in the control of nitrate leaching from sandy soil was established through a column experiment. In a PVC column with 3 inches dia and 45 cm length packed with sandy soil, six leaching at 15 days intervals were performed. Nitrogen was added @ 150 kg ha-1. The results of the study indicated the significant influence of clay @ 40 t and humic acid @ 20 kg ha-1 were efficient in the control of NO - and NH + N leached through the column and a corresponding increase of retension of N in soil. The linear equation model was used to ascertain the influence of the physiochemical characteristics on the leaching of nutrients.