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The aim of the paper is to present cost-effective solutions, arsenic removal treatment system from arsenic prone groundwater source and ecological surface water treatment system as an alternative source of arsenic free water were developed for rural areas at Jyot Sujan village, Murshidabad District, West Bengal, India. 92-94% turbidity removal is possible from HRF 1 and 2, 99.22% turbidity removal is also possible from SSF1 and 2. And pH and bacteria are reducing from the combined surface water treatment system. A dual treatment method for groundwater comprising of oxidationcoagulation-filtration and adsorption by activated alumina is proven to be more economic having more capacity and superior reliability in terms of water quality prescribed by IS 10500, 2012 as compared to other arsenic removal processes using various other media.

A field experiment was carried out during the winter season of 2015-16 to study the effects of four levels of irrigation (gravity drip at 1.0, 0.8 and 0.6 of crop evapotranspiration and surface irrigation) and four levels of nitrogen management (100% inorganic N, 75% inorganic N + 25% inorganic N as vermicompost, 75% inorganic N + 25% inorganic N as FYM and 75% inorganic N + 25% inorganic N as mustard oilcake) on the temporal distribution of water and macronutrients in sweet corn field grown in sandy loam soil. The results of the study showed that amounts of soil water consistently decreased with increase in soil depth; the more so in higher irrigation level than in lower irrigation level and that too under integrated nitrogen management schedule than in chemical nitrogen fertilization only. Higher soil moisture storage was observed in rooting zone depth under drip irrigation scheduling at 1.0 ETc followed by 0.8 ETc as compared with surface irrigation. Higher availability of N, P and K contents in soils at harvest was observed in deficit irrigation regimes than in higher irrigation regimes and that too with integrated N supply than with chemical N fertilization only. Maximum NPK uptake by plant was noticed with surface irrigation and drip irrigation at 1.0 ETc each provided with 75% N as fertilizer and 25% N as vermicompost. The deficit irrigation scheduling with different N management resulted in moderate to low uptake of macronutrients from soil by corn plant.

A field experiment was conducted during three consecutive winter seasons of 2013-14 to 2015-16 in the Indo-Gangetic plains encompassing humid tropical climatic region to study four irrigation regimes (gravity drip at 1.0, 0.8 and 0.6 ETc and surface irrigation) and four nitrogen management (100% RDN, 75% RDN + 25% RDN as vermicompost, 75% RDN + 25% RDN as FYM and 75% RDN + 25% RDN as mustard oilcake) on sweet corn. The results showed that surface irrigation with 75% RDN + 25% RDN as vermicompost was found the best treatment combination for maximum yield and economic realization which being competitive with drip irrigation at 1.0 ETc with 75% RDN + 25% RDN as vermicompost. Relatively higher quality parameters and moderate water productivity were observed with drip irrigation schedule at 1.0 ETc. The findings portray the precise planning and efficient management of available water and nitrogen resources for sweet corn growers.