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Custom Soil Resource Report <br />The soil is tilled for at least one growing season for weed control and <br />decomposition of plant residue. <br />Fan remnant <br />A general term for landforms that are the remaining parts of older fan landforms, <br />such as alluvial fans, that have been either dissected or partially buried. <br />Fertility, soil <br />The quality that enables a soil to provide plant nutrients, in adequate amounts and <br />in proper balance, for the growth of specified plants when light, moisture, <br />temperature, tilth, and other growth factors are favorable. <br />Fibric soil material (peat) <br />The least decomposed of all organic soil material. Peat contains a large amount <br />of well preserved fiber that is readily identifiable according to botanical origin. Peat <br />has the lowest bulk density and the highest water content at saturation of all <br />organic soil material. <br />Field moisture capacity <br />The moisture content of a soil, expressed as a percentage of the ovendry weight, <br />after the gravitational, or free, water has drained away; the field moisture content <br />2 or 3 days after a soaking rain; also called normal field capacity, normal moisture <br />capacity, or capillary capacity. <br />Fill slope <br />A sloping surface consisting of excavated soil material from a road cut. It <br />commonly is on the downhill side of the road. <br />Fine textured soil <br />Sandy clay, silty clay, or clay. <br />Firebreak <br />An area cleared of flammable material to stop or help control creeping or running <br />fires. It also serves as a line from which to work and to facilitate the movement of <br />firefighters and equipment. Designated roads also serve as firebreaks. <br />First bottom <br />An obsolete, informal term loosely applied to the lowest flood -plain steps that are <br />subject to regular flooding. <br />Flaggy soil material <br />Material that has, by volume, 15 to 35 percent flagstones. Very flaggy soil material <br />has 35 to 60 percent flagstones, and extremely flaggy soil material has more than <br />60 percent flagstones. <br />Flagstone <br />A thin fragment of sandstone, limestone, slate, shale, or (rarely) schist 6 to 15 <br />inches (15 to 38 centimeters) long. <br />31 <br />