Pokharel, B. B., Sharma, S. R., Pun, G. B. and Chhetri, N. S. (2016) “Phosphorous as the major yield limiting nutrient for maize in the river basin areas of western Nepal”, Journal of Maize Research and Development, 2(1), pp. 100–108. doi: 10.3126/jmrd.v2i1.16220.