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• capable of being managed so that all horizons within a depth of 40 inches (1 meter) or in the root zone <br />if it is less than 40 inches will have a conductivity of the saturated extract of less than 4 mmhos/cm and <br />the exchangeable sodium percentage (ESP) is less than 15; irrigated soils with bedrock within 40 inches <br />of the surface and soil horizons that have a pH higher than 7.4 are considered as having high <br />conductivity and therefore not prime;5. slope of irrigated prime farmland will not exceed 6 <br />percent.Uniaue FarmlandUnique Farmland is land other than Prime Farmland that is used for the <br />production of specific high value food and fiber crops. It has the special combination of soil quality, <br />location, growing season, and moisture supply needed to economically produce sustained high quality <br />and/or high yield of a specific crop, when treated and managed according to acceptable farming <br />methods. Two areas in Colorado are considered Unique Farmlands of National Importance -the fruit <br />orchards in the Grand Valley and the Delta-Montrose areas, and the seed potato and fruit and vegetable <br />producing areas of the San Luis Valley. <br />• <br />U <br />(Revised March 2006) Attachment 2.04.9-5-4 <br />