An experiment was conducted in an arsenicaffected area of West Bengal, India, with the aim of alleviating arsenic toxicity from food chain through water management in rice field and modification of cooking procedure of the same grain in kitchen. Three regimes of deficit irrigation, viz. intermittent ponding, saturation and aerobic condition were tested in field against continuous ponding, i.e. local farmers' practice. Produced grains were cooked in traditional method with both arsenic-contaminated and filtered water. Results revealed that deficit irrigation can be efficiently used to reduce the arsenic load in rice grain. Water management in field can reduce 9-21 % arsenic content in raw rice grain and can save 150-340 mm of irrigation water over traditional cultivation procedure. Furthermore, use of filtered water for cooking can alleviate up to 32 % of arsenic. The study also revealed that growing rice under deficit irrigation can also increase the water use efficiency of the crop.
An experiment was conducted during the rabi season of 2012-13 and 2013-14 at Instructional Farm, Jaguli, Nadia, West Bengal to find out the different doses of nitrogen and potassium on growth and yield of potato. The experiment was designed in RBD with 10 treatments replicated thrice in potato cultivated variety Kufri Jyoti. Different doses of nitrogen and potassium were considered as treatments. For all the treatments P2O5 dose was 150 kg ha-1. The size of the experimental plots were 12 square meter and seed tubers were planted with 50 cm X 20 cm spacing. In this experiment, it was observed that the growth attributes like plant height, leaf area index, dry matter accumulation of tubers at 80 DAP, crop growth rate at 60-80 DAP were highest with the application of 250 kg ha-1 N, 200 kg K2O (T9) and statistically at par with 300 kg ha-1 N, 150 kg ha-1 K2O (T10). Again among the yield parameters, T9 recorded the highest tuber number per square meter and tuber yield which was closely followed by T10. Highest B:C ratio was also observed in T9.This result proves that T9 can be recommended to get better growth and economic yield of potato than T10 (farmer practice does) in the new alluvial soil of West Bengal.
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