V.P. SINGH and V.K. SINGH, “ Productivity potential and economics of maize (Zea mays) max) intercroping patterns under and soybean (Glycine rainfed low hill or valley situation of Uttaranchal”, IJA, vol. 46, no. 1, p. 46_1 , Oct. 2001, doi: 10.59797/ija.v46i1.3214.