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The idea of soil loss tolerance was initially devised by the SCS (known presently as the NRCS). It was based on the minimum soil loss rate required to reduce organic content and harm crop productivity. In its early stages of development, soil loss tolerance rates were inconsistent because they were obtained based on rough estimates.
Nutrients in the soil are taken up by the plant through its roots, and in particular its root hairs.To be taken up by a plant, a nutrient element must be located near the root surface; however, the supply of nutrients in contact with the root is rapidly depleted within a distance of ca. 2 mm. [14] There are three basic mechanisms whereby nutrient ions dissolved in the soil solution are brought ...
Optimal soil depth is between 50 and 100 cm, [11] with a light soil texture. [11] Soil fertility should be low [11] and soil pH is best suited between 5 and 6.5 [11] and should not be lower than 4.3 [11] or higher than 7. [11] Bambara groundnut is tolerant to salinity, but high sodium chloride concentration in the soil will result in yield losses.
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Nitrogen and potassium are also needed in substantial amounts. For this reason these three elements are always identified on a commercial fertilizer analysis. For example, a 10-10-15 fertilizer has 10 percent nitrogen, 10 percent available phosphorus (P 2 O 5) and 15 percent water-soluble potassium (K 2 O). Sulfur is the fourth element that may ...
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Clay cannot be resolved by optical microscopes as its particles are 0.002 mm (7.9 × 10 −5 in) or less in diameter and a thickness of only 10 angstroms (10 −10 m). [ 16 ] [ 17 ] In medium-textured soils, clay is often washed downward through the soil profile (a process called eluviation ) and accumulates in the subsoil (a process called ...
Muck farming on drained swamps is an important part of agriculture in New York, Ohio, Illinois, Indiana, Michigan, Wisconsin, and Florida, where mostly vegetables are grown. The muckland of Torrey Farms of Elba, New York , which covers the counties of Orleans , Niagara , and Genesee , is thought to be the largest continuous section of muckland ...
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