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By Anubha Kaushik, C.P. Kaushik
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This sub-surface drainage system has been tried in the experimental station of CSSRI at Sampla, Haryana. e. from the barren land to productive land through its research applications. CASE STUDIES Salinity and water logging in Punjab, Haryana and Rajasthan : The first alarming report of salt-affected wasteland formation in connection with irrigation practices came from Haryana (then Punjab) in 1858. It was reported that several villages in Panipat, Rohtak and Delhi lying in command area of Western Yamuna Canal were suffering from destructive saline efflorescence.
Ii) Lowering of water table: Mining of groundwater is done extensively in arid and semi-arid regions for irrigating crop fields. However, it is not advisable to do excessive mining as it would cause a sharp decline in future agricultural production, due to lowering of water table. (iii) Water logging: When excessive irrigation is done with brackish water it raises the water table gradually leading to water-logging and salinity problems. Natural Resources 17 Surface Water The water coming through precipitation (rainfall, snow) when does not percolate down into the ground or does not return to the atmosphere as evaporation or transpiration loss, assumes the form of streams, lakes, ponds, wetlands or artificial reservoirs known as surface water.
Meat and milk are mainly consumed by more developed nations of North America, Europe and Japan who consume about 80% of the total. Fish and sea-food contribute about 70 million metric tons of high quality protein to the worlds diet. But there are indications that we have already surpassed sustainable harvests of fish from most of the worlds oceans. The Food and Agriculture Organization (FAO) of United Nations estimated that on an average the minimum caloric intake on a global scale is 2,500 calories/day.