Vol. 12 No. 2
Standardization of fertigation schedule for tomato (Solanum lycopersicum L) under open precision farming
Author(s): J. AMALA AND E. K. SYRIAC
Abstract: An investigation was carried out in College of Agriculture,rnVellayani, Thiruvananthapuram, to standardize the fetigation schedule forrntomato and to assess the impact of precision farming practices on growth, yieldrnand economics of tomato under open precision farming during summer season ofrn2015. Experiment was laid out in split plot design with four replication. Fourrnfertigation levels (75, 100, 125 and 150 per cent recommended dose of nitrogenrnand potassium) and two fertigation intervals ( four days, eight days) alongrnwith two controls were tested in the present investigation. Maximum drymatterrnproduction  (219.42 g plant-1),rnfruit set per cent (62.77), fruits plant-1rn(33.67) and fruit yield (42.36 t ha-1)  were registered for 125 per cent recommendedrndose of N and K. Higher leaf area index (1.87), dry matter production(224.21grnplant-1), fruit set per centrn(60.74), fruits plant-1 (35.53), andrnfruit yield (44.25 t ha-1)  were recorded for fertigation at four daysrninterval. Economic analysis revealed that 125 % RD of N and K registered thernhighest net income (4,55,466 ha-1)  and B: C ratio (2.16) compared to otherrnfertigation levels and fertigation at four days interval registeredrnsignificantly higher net income (4,93,051ha-1)  and B: C (2.26) ratio compared to fertigation at eight days interval.
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