Wind, water, ice and waves carry off soil particles and cause soil erosion. Although this is a natural process, human activities that disturb the surface of the earth increase the rate of soil erosion. Activities such as mining, construction, deforestation and intensive agriculture leave the topsoil exposed and vulnerable to the agents of erosion.Know More
When wind, water, ice and waves encounter bare topsoil, soil erosion occurs. Rainfall and rainfall runoff cause splash, sheet, rill and gully erosion. Streams and rivers cause valley or stream erosion and bank erosion. The action of waves and currents causes shoreline erosion along sheltered and exposed coasts.
Glaciers freeze to their beds and move frozen sediment with them as they surge forward in a process called ice thrusting. When water freezes in rock cracks in cold weather, the cracks freeze and expand, shattering the rock. On steep slopes, this leads to gravity erosion.
When wind collects soil particles and carries them away, one of three types of deflation occurs. Surface creep refers to large particles rolling along the surface, saltation refers to particles lifting into the air, and bouncing and suspension refer to the wind lifting small particles into the air and transporting them over long distances.Learn more about Soil
Wind causes erosion in one of three ways: suspension, saltation or surface creep. There are many problems that arise from wind erosion, including air pollution, soil loss and dryness. Soil tillage, crop barriers and crop strips all help reduce the effects of wind erosion.Full Answer >
The white material in commercial potting soil is perlite or vermiculite, substances that retain water and add texture to the soil to keep it from becoming compacted. Most commercial potting soil mixtures are made up of at least 25 percent perlite.Full Answer >
Pore space in soil is the volume of space that can be filled with water or air. A large pore space is normally filled with air while smaller pore spaces are primarily filled with water.Full Answer >
Clay soil is soil that is comprised of mostly clay. When clay soil is 50 percent or more clay, it is defined as heavy clay.Full Answer >