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94% of the application methods of irrigation water at field level is of the category surface irrigation, [1] whereby the water is spread over the field by gravity.. Of the remaining 6%, the majority is irrigated by methods requiring energy, expensive hydraulic pressure techniques and pipe systems like sprinkler irrigation and drip irrigation, for the major part in the USA.
Country/Territory/Region Irrigated land (km 2) Date of information World 3,242,917 2012 est. Afghanistan 24,930: 2020 Albania 1,820: 2020 Algeria 12,605: 2016 American Samoa 0
Irrigation is the artificial exploitation and distribution of water at project level aiming at application of water at field level to agricultural crops [1] in dry areas or in periods of scarce rainfall to assure or improve crop production.
Inf = Irr + Wel, where Irr = surface irrigation from the canal system, and Wel = the irrigation from wells; The field irrigation efficiency (Ff < 1) is: Ff = Era / Inf, where Era = the evapotranspiration of the crop (consumptive use) The value of Era is less than Inf, there is an excess of irrigation that percolates down to the subsoil (Per):
Irrigation is an artificial application of water into soil for plant growth and survival, in horticulture and agriculture ... Statistics; Cookie statement;
In the United States an irrigation district is a cooperative, self-governing public corporation set up as a subdivision of the State government, with definite geographic boundaries, organized, and having taxing power to obtain and distribute water for irrigation of lands within the district; created under the authority of a State legislature with the consent of a designated fraction of the ...
The lower the irrigation efficiency, the higher the losses. Although reasonably high irrigation efficiencies of 70% or more (i.e., losses of 30% or less) can occur with sophisticated techniques like sprinkler irrigation and drip irrigation or by well-managed surface irrigation, in practice the losses are commonly in the order of 40% to 60% ...
Drip irrigation or trickle irrigation is a type of micro-irrigation system that has the potential to save water and nutrients by allowing water to drip slowly to the roots of plants, either from above the soil surface or buried below the surface.