Economics and productivity of two crop rotations and their integrated nutrient management of irrigated areas in south-western Rajasthan

A 4-year field experiment was conducted during 1994–98 to compare the 2 crop rotations under 8 different nutrient-management practices at Keshwana, Jalore, Rajasthan, India, grown under assured irrigated conditions. Clusterbean [Cyamopsis tetragonoloba (L.) Taubert]-mustard [Brassica juncea (L.) Zernj. & Cosson]-greengram (Phaseolus radiatus L) rotation gave significantly higher greengram-equivalent yield (GEY), gross income, net income and benefitxost ratio than sesame (Sesamum indicum L.)-wheat (Triticum aestivum L. emend. Fiori & Paol.)-greengram rotation at all the levels of nutrient management. Treatment of 100% NPK through chemical fertilizer + 2.5 tonnes gypsum provided the maximum greengram-equivalent yield, net income and benefit:cost ratio in both the crop rotations. Other treatments of 100% NPK through chemical fertilizer and 75% NPK through chemical fertilizer + 25% through FYM were also comparable to the above treatment. Farmer's practice of applying 100% NPK through chemical fertilizer + 10 tonnes FYM recorded higher yields and gross income but lesser net income and benefitcost ratio.