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Nutrients213-page6 - requirements of plant Soil Components...

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Plant Nutrients and Soils - 6 Soil Properties and Mineral Absorption Soil and its relationship to mineral needs of plants is critical. Soil serves as the: Reservoir for many mineral ions Storage for some mineral ions The rate of mineral absorption is affected by: Available concentration of the mineral in the soil o Oxidation may make some minerals more available o Hydrolysis frees some minerals from parent rock o Acids such as carbonic acid, free some minerals from parent rock Solubility of the available form of the mineral in water The solubility of many minerals can be altered by changes in soil conditions and other soil substances. Because of this, it is useful to look at soil as it relates to the mineral
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Unformatted text preview: requirements of plant. Soil Components The origin of any soil is the parent rock, of whatever type, which is "weathered" to tiny particles by mechanical and chemical processes (mostly involving water). The mineral component of soil is determined by the parent rock of that area. Living organisms affect the formation of soil from parent rock, as well. Lichens, mosses and fungi are especially important in soil formation. Any soil "community" includes: • Mineral particulates • Living organisms • Air and water spaces (30 - 60% of soil volume) • Humus (decayed and decaying organic material) component...
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