Effect of low and high quality organic materials on maize yield and soil properties [printed text] / Tripathi, B.P., Editor; Tuladhar, J.K., Author. - [s.d.]. - 175-186 p. in Monograph : printed text Proceedings of the 20th National Summer Crops Workshop on Maize Research in Nepal held at Parwanipur, Bara, April 22-24 1997 / Adhikari, K.