Search results
Results from the WOW.Com Content Network
The Natural Resources Conservation Service divides Iowa into 23 soil regions. In general, soils of southern, eastern, and western Iowa are loess-derived, while soils of northern and central Iowa are till-derived. Most level areas of Iowa have soils highly suitable for agriculture, making Iowa one of the most productive farming regions of the world.
Soil erosion may be a slow process that continues relatively unnoticed, or it may occur at an alarming rate causing a serious loss of topsoil. The loss of soil from farmland may be reflected in reduced crop production potential, lower surface water quality and damaged drainage networks. Soil erosion could also cause sinkholes.
A well-defined band of pahas runs between Mount Vernon and Martelle, Iowa and is crossed by Iowa Highway 1. Most are in Benton, Linn, Johnson and Jones counties. [citation needed] Casey's Paha State Preserve in Hickory Hills County Park, Tama County, Iowa preserves the southeast end of a 2-mile (3.2 km) long paha. [12]
The solution is to rebuild that wall of church-state separation, for Iowa to go back to its roots and lean on science, reason and empathy to build a better state and future for all of us.
Soil erosion is the main factor for soil degradation and is due to several mechanisms: water erosion, wind erosion, chemical degradation and physical degradation. Erosion can be influenced by human activity. For example, roads which increase impermeable surfaces lead to streaming and ground loss.
Topography of Iowa, with counties and major streams Landforms of Iowa, based on Prior (1991) and Calvin (1904), with major rivers and streams. Despite popular perception, Iowa is generally not flat; most of the state consists of rolling hills. Prior [19] divides Iowa into eight landforms based on glaciation, soils, topography, and river drainage:
Slope stability refers to the condition of inclined soil or rock slopes to withstand or undergo movement; the opposite condition is called slope instability or slope failure. The stability condition of slopes is a subject of study and research in soil mechanics , geotechnical engineering , and engineering geology .
Eroded hilltops due to tillage erosion. Tillage erosion is a form of soil erosion occurring in cultivated fields due to the movement of soil by tillage. [1] [2] There is growing evidence that tillage erosion is a major soil erosion process in agricultural lands, surpassing water and wind erosion in many fields all around the world, especially on sloping and hilly lands [3] [4] [5] A signature ...