Author(s): L. NABACHANDRA SINGH, S. SHAKHEN AND D. B. JOHN

Abstract: An experiment was conducted during kharif 2005 and 2006 at the Research Farm of College of Agriculture, Central Agricultural University, Imphal to determine the production potential and economic feasibility of rice + arrowhead intercropping under rainfed condition of Manipur. Highest grain yield of rice (4.65 t ha-1) was recorded in sole rice, followed by rice + arrowhead in 1:1 row ratio combination maintaining normal population of rice. Similarly, the highest tuber yield of arrowhead was recorded in sole arrowhead followed by rice + arrowhead intercropping in 1:1 row ratio combination by replacement series. Other than the sole arrowhead, among the remaining treatments 1:1 row ratio combination by replacement series produced highest total rice equivalent yield (135.22qha-1), per day ha rice equivalent yield (96.58 kg ha-1day-1), gross return (Rs.94,694ha-1), net return (Rs.79,458ha-1), return per rupee invested (Rs.5.21ha-1) and labour use efficiency (Rs 11.34ha-1). Whereas the highest land equivalent ratio (1.31) was found in 1:1 row ratio combination maintaining normal population of rice with higher monetary advantage (Rs. 24163).

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