PERFORMANCES OF MULTI NUTRITIONAL ORGANIC FERTILIZER ON NUTRIENT SUPPLY FOR YIELD OF TOMATO TREATED IN GRAY TERRACE SOIL OF MADHUPUR TRACT

An experiment was conducted at central research farm of Bangladesh Agricultural Research Institute (BARI), Gazipur during the rabi season of 2005-2007 to find out the effect of ´lalon´ an organic fertilizer in maximizing the yield of tomato (var. MS 221). There were seven levels of fertilizers. These were: absolute control, Lalon @ 200 kg/ha, 100% recommended dose (RD) of fertilizer as per BARC Guide´2005, Lalon @ 200 kg/ha + 100% RD, Lalon @ 200 kg/ha + 75% RD, Lalon @ 200 kg/ha + 50% RD and Lalon @ 200 kg/ha + 25% RD. Recommended dose of fertilizer for tomato was 120-40-100-20-1-0.5 kg/ha of N-P-K-S-B-Mo + cowdung @ 3 ton/ha. Different doses of chemical fertilizer in combination with lalon significantly increased the yield and yield components of tomato. The highest fruit yield, 50.79 t/ha was recorded with Lalon @ 200 kg/ha +100% RD, which was statistically similar with that of Lalon @ 200 kg/ha + 75% RD and Lalon @ 200 kg/ha + 50% RD. Economic analysis showed that the highest gross margin (Tk. 4, 94,620) per hectare was obtained with the treatment having Lalon @ 200 kg/ha + 100% RD though the variable cost was also highest. The gross margins of treatments having Lalon @ 200 kg/ha + 75% RD and Lalon @ 200 kg/ha + 50% RD were found very close with the treatment having Lalon @ 200 kg/ha + 100% RD. Economic analysis showed that the the highest marginal rate of return (MRR) was obtained in the treatment having Lalon @ 200 kg/ha + 50% RD.