in Boise .
Written in English
|Contributions||Bradshaw, George Bergstrom, 1920-|
|The Physical Object|
|Number of Pages||19|
N.R. Fausey, in Encyclopedia of Soils in the Environment, Introduction. Soil drainage is a natural process by which water moves across, through, and out of the soil as a result of the force of gravity. Drainage is a component of the global hydrologic cycle; and streams and rivers are the naturally developed drainage conduits through which some of the water arrives at the land surface as Whereas irrigation and drainage are intended to address the shortage and surplus of soil water, respectively, an important aspect to address is also the management of salinity. Plants have a limited tolerance for soil water salinity, and despite significant gaps in our practical knowledge, an impression of acceptable salinities is available for many :// Waterlogging and reduced O2 levels in the soil affect the roots ability to absorb water and nutrients and when this happens the root sends a signal to the tree which triggers the leaf stomata to close to reduce water loss. Because the roots cannot take up water the leaves begin to wilt. Most research concludes Logging, road and building projects gouge the soil, strip away vegetation, and can significantly alter drainage patterns. In addition to the loss of soil, an increase in both nutrient and sediment runoff can cause deterioration in overall water ://
chemical weathering causes a type of pollution known as acid drainage. Abandoned mines can fill with rainwater. Sulfide minerals react with the air and the water to produce sulfuric acid. Then the acid water drains from the mines, polluting the soil in surrounding areas. check your reading How do some methods of mining affect the soil? The grazing animals feed on the grasses and remove the vegetation from the land. Their hooves churn up the soil. They also pull out plants by their roots. This loosens the soil and makes it more prone to erosion. Logging and Mining. A large number of trees are cut down to carry out the logging process. Trees hold the soil :// The soil is the lifeblood of your crop or pasture. This important asset supplies nutrients, water and oxygen to plants, supports machinery and animal traffic, and provides a medium for the decomposition of crop and pasture residues. Soil management will affect land productivity and environmental sustainability. Maintaining They are defined as waterlogged, unconsolidated soil material which will become acid sulphate upon drainage and exposure to the air. Their pH varies around 5 to 6. However, oxidation through chemical and biological processes will result in the acidification of the soil, the pH reaching 4 or even less within a few
Heavy logging machinery damages precious topsoil and decreases its ability to absorb water. Logging slash (leftover tree limbs) or debris blocks natural drainage basins. Anytime large amounts of vegetation are removed from an area the delicate root systems eventually die off which leaves the soil vulnerable to over :// Inorganic water pollutants: They may arise from heavy metals from acid mine drainage; silt from surface run-off, logging, slash and burning practices and land filling; fertilizers metres of the soil surface indicate the potential for salts to accumulate at the soil surface. Inefficient irrigation and drainage systems are a major cause of excess leakage and increase the risk of salinity and waterlogging in irrigation areas. Poor water distribution on paddocks results in some areas being under-irrigated, causing salts Soil compaction. After prolonged rainfall, soil becomes waterlogged. And if walked on or driven over, the soil becomes compacted and drainage gets