Khadka, D., S. Lamichhane, K. P. Bhurer, J. N. Chaudhary, M. F. Ali, and L. Lakhe. “Soil Fertility Assessment and Mapping of Regional Agricultural Research Station, Parwanipur, Bara, Nepal”. Journal of Nepal Agricultural Research Council, vol. 4, no. 1, May 2018, pp. 33-47, doi:10.3126/jnarc.v4i1.19688.