Laserfiche WebLink
Custom Soil Resource Report <br /> Topsoil <br /> The upper part of the soil, which is the most favorable material for plant growth. <br /> It is ordinarily rich in organic matter and is used to topdress roadbanks, lawns, <br /> and land affected by mining. <br /> Trace elements <br /> Chemical elements, for example, zinc, cobalt, manganese, copper, and iron, in <br /> soils in extremely small amounts. They are essential to plant growth. <br /> Tread <br /> The flat to gently sloping, topmost, laterally extensive slope of terraces, flood- <br /> plain steps, or other stepped Iandforms; commonly a recurring part of a series <br /> of natural steplike Iandforms, such as successive stream terraces. <br /> Tuff <br /> A generic term for any consolidated or cemented deposit that is 50 percent or <br /> more volcanic ash. <br /> Upland <br /> An informal, general term for the higher ground of a region, in contrast with a <br /> low-lying adjacent area, such as a valley or plain, or for land at a higher <br /> elevation than the flood plain or low stream terrace; land above the footslope <br /> zone of the hillslope continuum. <br /> Valley fill <br /> The unconsolidated sediment deposited by any agent (water, wind, ice, or mass <br /> wasting) so as to fill or partly fill a valley. <br /> Variegation <br /> Refers to patterns of contrasting colors assumed to be inherited from the parent <br /> material rather than to be the result of poor drainage. <br /> Varve <br /> A sedimentary layer or a lamina or sequence of laminae deposited in a body of <br /> still water within a year. Specifically, a thin pair of graded glaciolacustrine layers <br /> seasonally deposited, usually by meltwater streams, in a glacial lake or other <br /> body of still water in front of a glacier. <br /> Very stony spot (map symbol) <br /> A spot where 0.1 to 3.0 percent of the soil surface is covered by rock fragments <br /> that are more than 10 inches in diameter in areas where the surface of the <br /> surrounding soil is covered by less than 0.01 percent stones. <br /> Water bars <br /> Smooth, shallow ditches or depressional areas that are excavated at an angle <br /> across a sloping road. They are used to reduce the downward velocity of water <br /> and divert it off and away from the road surface. Water bars can easily be <br /> driven over if constructed properly. <br /> 71 <br />