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Parboiling (or leaching) is the partial or semi boiling of food as the first step in cooking. The word is from the Old French parbouillir , 'to boil thoroughly' but by mistaken association with "part", it has acquired its current meaning.
In agriculture, leaching is the loss of water-soluble plant nutrients from the soil, due to rain and irrigation. Soil structure , crop planting, type and application rates of fertilizers , and other factors are taken into account to avoid excessive nutrient loss.
Leaching is the process of a solute becoming detached or extracted from its carrier substance by way of a solvent. [ 1 ] Leaching is a naturally occurring process which scientists have adapted for a variety of applications with a variety of methods.
In pedology, leaching is the removal of soluble materials from one zone in soil to another via water movement in the profile. [1] It is a mechanism of soil formation distinct from the soil forming process of eluviation , which is the loss of mineral and organic colloids .
The leaching process in a salty soil to be reclaimed is illustrated in the leaching curves of figure 1, derived from data of the Chacupe pilot area, Peru. [2] It shows the soil salinity in terms of electrical conductivity (EC) of the soil solution with respect its initial value (ECi) as a function of amount of water percolating through the soil.
Leaching is the loss or extraction of certain materials from a carrier into a liquid (usually, but not always a solvent), and may refer to: Leaching (agriculture) , the loss of water-soluble plant nutrients from the soil; or applying a small amount of excess irrigation to avoid soil salinity
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Locations that have high rainfall levels become acidic through leaching. Land used for crop and livestock purposes loses minerals over time by crop removal and becomes acidic. [ 5 ] The application of modern chemical fertilizers is a major contributor to soil acid by the process in which the plant nutrients react in the soil.