I.B. PANDEY, S.K. SINGH, and S. TIWARI, “Integrated nutrient management for sustaining the productivity of pigeonpea (Cajanus cajan) based intercropping systems under rainfed condition”, IJA, vol. 58, no. 2, pp. 192–197, Oct. 2001, doi: 10.59797/ija.v58i2.4171.