Abstract

A study was conducted in first and second rotation teak plantations in Nilambur, Kerala on soil organic carbon and different forms of N (available, ammoniacal and nitrate forms) . It was revealed that there was significant reduction in soil organic carbon and all forms of N in all layers of soil pits in the second rotation when compared with first rotation. The C: N ratio in soil under second rotation was found to be narrower as compared to that of the soil under first rotation. The depth-wise and rotation-wise distribution of available, ammoniacal and nitrate forms of N was similar to that of total N