Laserfiche WebLink
Custom Soil Resource Report <br /> Intermittent stream <br /> A stream, or reach of a stream, that does not flow year-round but that is <br /> commonly dry for 3 or more months out of 12 and whose channel is generally <br /> below the local water table. It flows only during wet periods or when it receives <br /> ground-water discharge or long, continued contributions from melting snow or <br /> other surface and shallow subsurface sources. <br /> Invaders <br /> On range, plants that encroach into an area and grow after the climax <br /> vegetation has been reduced by grazing. Generally, plants invade following <br /> disturbance of the surface. <br /> Iron depletions <br /> See Redoximorphic features. <br /> Irrigation <br /> Application of water to soils to assist in production of crops. Methods of <br /> irrigation are: <br /> Basin:Water is applied rapidly to nearly level plains surrounded by levees or <br /> dikes. <br /> Border:Water is applied at the upper end of a strip in which the lateral flow of <br /> water is controlled by small earth ridges called border dikes, or borders. <br /> Controlled flooding:Water is released at intervals from closely spaced field <br /> ditches and distributed uniformly over the field. <br /> Corrugation:Water is applied to small, closely spaced furrows or ditches in <br /> fields of close-growing crops or in orchards so that it flows in only one direction. <br /> Drip (or trickle):Water is applied slowly and under low pressure to the surface <br /> of the soil or into the soil through such applicators as emitters, porous tubing, or <br /> perforated pipe. <br /> Furrow:Water is applied in small ditches made by cultivation implements. <br /> Furrows are used for tree and row crops. <br /> Sprinkler.-Water is sprayed over the soil surface through pipes or nozzles from <br /> a pressure system. <br /> Subirrigation:Water is applied in open ditches or tile lines until the water table is <br /> raised enough to wet the soil. <br /> Wild flooding:Water, released at high points, is allowed to flow onto an area <br /> without controlled distribution. <br /> Kame <br /> A low mound, knob, hummock, or short irregular ridge composed of stratified <br /> sand and gravel deposited by a subglacial stream as a fan or delta at the <br /> margin of a melting glacier; by a supraglacial stream in a low place or hole on <br /> the surface of the glacier; or as a ponded deposit on the surface or at the <br /> margin of stagnant ice. <br /> 51 <br />