YIELD, WATER USE EFFICIENCY AND ECONOMIC EVALUATION OF DRIP IRRIGATED BRINJAL (SOLANUM MELONGENA L.) AS AFFECTED BY SINGLE AND DOUBLE INLET LATERALS AND SUB MAIN SIZES

B. MOHANTY¹*, S.C. SENAPATI², A.P. SAHU³, B. PANIGRAHI^4
1Department of Soil & Water Cons. Engg, College of Agricultural Engineering & Technology, Orissa University of Agriculture & Technology, Bhubaneswar, 751003, Odisha
²Department of Soil & Water Cons. Engg, College of Agricultural Engineering & Technology, Orissa University of Agriculture & Technology, Bhubaneswar, 751003, Odisha
³Department of Soil & Water Cons. Engg, College of Agricultural Engineering & Technology, Orissa University of Agriculture & Technology, Bhubaneswar, 751003, Odisha
⁴Department of Soil & Water Cons. Engg, College of Agricultural Engineering & Technology, Orissa University of Agriculture & Technology, Bhubaneswar, 751003, Odisha
* Corresponding Author : bimalendum@rediffmail.com

Received : 16-06-2016     Accepted : 04-07-2016     Published : 18-10-2016
Volume : 8     Issue : 48       Pages : 2030 - 2032
Int J Agr Sci 8.48 (2016):2030-2032

Keywords : Benefit cost ratio, Internal rate of return, Net present value, Payback period, Water use efficiency
Academic Editor : Dr Arvind Singh Tomar, Subrat Kumar Behera, Prabhat Ch Pradhan, Er Rajinkumar Jadavbhai Patel
Conflict of Interest : None declared
Acknowledgements/Funding : None declared
Author Contribution : None declared

Experiment was conducted during three growing seasons (2011 to 2013) in Jamunali village of Chhendipada block in Angul district of Odisha, India in a farmer’s field to study the effect of five different single and double inlet lateral connections with three different commonly available sub-main pipe sizes (40, 50 and 63 mm) on yield and economics of drip irrigated brinjal (Solanum melongena L.) crop. Maximum yield and WUE of 399.48 q/ha and 880.58 kg / ha-cm have been observed in case of double inlet system connected with two sub-mains of 63 mm diameter and the lateral connecting to both the sub-mains at two ends laid on two sides of the field (T15). Minimum yield (380.67 q/ha) and WUE (839.11 kg / ha-cm) values have been found in case of single inlet laterals laid on one side of sub main of 40 mm diameter (T1). Economic analysis shows maximum value of Net Present Value (NPV), Benefit Cost ratio (B:C), Internal Rate of Return (IRR) and minimum Pay Back Period (PBP) in case of treatment where laterals have been laid and looped on one side of the sub-main with size 40 mm (T2, NPV – Rs. 649488/- , B:C – 3.11, IRR – 67.29%, PBP–2.66 years). Similarly, minimum value of NPV, B:C, IRR and maximum value of PBP have been observed for treatment where laterals have been connected to two sub-main pipes of dia 63 mm laid at two sides of the experimental plot (T15, NPV – Rs. 523824/-, B:C – 2.13, IRR – 41.02, PBP – 4.03 years) in spite of maximum yield due to increase in cost of the system. Hence, the system where laterals are looped on one side of sub-main pipe with dia 40mm (T4) is considered as the best one with respect to economic indicator values. Similarly, it is also observed that when single inlet systems are converted to the corresponding double inlet systems by looping the laterals (L1 to L2 and L3 to L4), yield and economics become better with incorporation of some minimal cost towards in-line laterals and connectors.