QUDRATULLAH EHSAN, et al. “Productivity and Resource-Use Efficiency of Greengram (Vigna Radiata) As Influenced by Sowing Methods and Phosphorus Levels under Semi-Arid Conditions of Afghanistan”. Indian Journal of Agronomy, vol. 62, no. 3, Oct. 2001, pp. 367-70, https://doi.org/10.59797/ija.v62i3.4124.