Erosion Control in Furrow Irrigation Using Polyacrylamide

摘要: Currently gravity irrigation remains the most widely used in agricultural areas and 90 percent of plantings, water is applied to plots by gravity. One main problems with these systems erosion, which a product erosive forces over row, brings soil loss therefore decreases crop yield. Erosion removal surface material caused or wind (Kirkby, 1984). It several factors, such as steep slopes, climate, inadequate use soil, vegetation cover natural disasters; however, human activities can greatly accelerate erosion rates. This phenomenon considered severe problem because it associated inappropriate practices, overgrazing, poor utilization forests, thickets, grasslands, changes land from forest primarily for purposes. According Becerra (2005), two types are geological accelerated erosion. Geological includes both training processes, maintain favorable balance, suitable plant growth. Accelerated degradation result activities. when found its environment under native vegetation. type responsible formation soils distribution on Earth's surface. The long-term effect this has led larger landscape features canyons, meandering rivers, valleys. In other words, action water, wind, glaciers. usually conditions mainly wind. involved are: (1) attack forces, remove transport particles, (2) resistance limit Soil source gradual decrease fertility productive capacity soils. hydric include rain runoff. general, divided into splashing raindrops, sheet rill gully channels. occurs raindrops fall directly onto particles very thin spraying huge amounts due kinetic energy impact. plane soils,