R. KUMAR, E. LUIKHAM, S. BABU, and A. K. SINGH, “Productivity, nutrient acquisition and economics of summer maize (Zea mays) under various levels of phosphorus and potash in valley land of Manipur”, Indian J Agri Sci, vol. 87, no. 11, pp. 1572–1574, Nov. 2017, doi: 10.56093/ijas.v87i11.75797.