Biological and economical feasibility of chickpea (Cicer arietinum) + Indian mus- tard (Brassicajuncea) cropping systems under varying levels of phosphorus

Abstract

A study was undertaken by introducing lndian mustard [Brassica juncea (L.) Czernj. & Cosson] as an inter- crop with chickpea (Cicer arietinum L.) in 2 row proportions, viz. 6:2 and 8:2, fertilized with 0, 30, 60 and 90 kg P,O,/ha during the winter season of 1998-99 and 1999-2000, to assess the biological and economical feasibil- ity of chickpea + lndian mustard in association under varying levels of phosphorus. Intercropping systems re- duced the values of yield attributes and seed yield of chickpea, while reverse was true in case of lndian mustard than sole cropping of chickpea and lndian mustard respectively. Both intercropping systems recorded signifi- cantly higher chickpea-equivalent yield, net monetary returns and benefit : cost ratio than its sole cropping. Among the intercropping systems, 8:2 row ratio proved most efficient and profitable system resulting in maximum chickpea-equivalent yield (24.31 qlha), net monetary returns (Rs 17,10I/ha), benefit : cost ratio (2:11) and land- equivalent ratio (1.19). Both chickpea and lndian mustard in sole and intercropping systems responded favourably up to 60 kg P,O$ha only for yield attributes, yield and net monetary returns over no phosphorus and 30 kg P,O$ha. The interaction effects of the factors showed that mean chickpea equivalents responded to P ap- plication up to 60 kg/ha in sole stands and up to 90 kg P,O,/ha in intercropping systems.