Irrigation on land uses other than cropland is not included. NRI maps reflect national patterns rather than site- specific information. Farm delivery and field distribution of irrigation water is a combination of gravity and pressure facilities. For example, a valve is used to reduce pressurized water delivered to a farm or field for subsequent distribution by a gravity surface irrigation system. Sub- surface irrigation pipelines or ditches.
Water is supplied to crops by ditches, pipes, or other conduits.
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