by Madhu, M., Ragupathy, R., Hombegowda, H.C., Muralidharan, P., Khola, O.P.S.
Published in Journal of environmental biology (01.01.2017)

by Mandal, D, Dadhwal, K.S, Khola, O.P.S, Dhyani, B.L
Published in Journal of soil and water conservation (01.11.2006)

by Blaise, D, Tyagi, P.C, Khola, O.P.S
Published in Nutrient cycling in agroecosystems (1996)