Drip is considered as the most efficient irrigation method amongst methods which as it wets up only one-third cropped surface area and saves about 40 to 50 per cent of irrigation water depending upon the situation.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/new-technique-reducing-surface-evaporation-and-improving-water-use-efficiency-drip
[2] http://admin.indiaenvironmentportal.org.in/category/author/kuldeep-b-patel
[3] http://admin.indiaenvironmentportal.org.in/category/author/r-patel
[4] http://admin.indiaenvironmentportal.org.in/category/author/madhusudan-m-parikh
[5] http://admin.indiaenvironmentportal.org.in/category/journal/water-energy-international
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/irrigation
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-management
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/horticulture
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/dryland-farming
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-conservation
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/dams-irrigation