Term
| the chemically significant components of the soil atmosphere |
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Definition
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Term
| why CO2 is important in soil |
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Definition
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Term
| why O2 is important in soil |
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Definition
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Term
| when gases readily diffuse thru the soil |
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Definition
| under water-unsat conditions |
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Term
| the effect of carbonic acid in rain and soil |
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Definition
| makes rain naturally acidic and hastens the weathering of soil minerals |
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Term
| the role of oxygen concerning redox statur |
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Definition
| oxygen is an oxidizing agent (electron acceptor) |
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Term
| the type of environment in the presence of oxygen |
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Definition
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Term
| the type of environment in the absence of oxygen |
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Definition
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Term
| why there's reducing conditions in water-saturated soil |
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Definition
| the low water solubility of O2 |
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Term
| what happens as a result of the degradation of biopolymers and the dissolution (aka weathering) of minerals in soil? |
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Definition
| the products of this breakdown get released into the soil solution and many reprecipitate to form relatively stable minerals, such as hydrous metal oxides |
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Term
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Definition
| weathering of soil minerals |
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Term
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Definition
| ions in solution that are attracted to inorganic and organic surfaces by relatively weak electrostatic forces |
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Term
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Definition
| soluble substances that form direct chemical bonds with soil particle surfaces |
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Term
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Definition
| mechanism of retention where a substance is essentially repelled from the polar soil solution and partitions into the nonpolar molecule framework of soil organic matter |
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Term
| the 7 elements that constitute 98% of the mass of soils |
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Definition
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Term
| the phase change that occurs in soils during synthesis |
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Definition
| going from soil atmosphere or soil solution to soil solids |
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Term
| the phase change that occurs in soils during decay |
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Definition
| going from soil solids to soil atmosphere or soil solution |
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Term
| the phase change that occurs in soils during precipitation |
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Definition
| going from soil solution to soil solids |
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Term
| the phase change that occurs in soils during weathering |
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Definition
| going from soil solids to soil solution |
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Term
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Definition
| exchange of ions between soil solution and soil solids |
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Term
| the phase change that occurs in soils during adsorption |
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Definition
| going from soil solution to soil solids |
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Term
| the phase change that occurs in soils during partitioning |
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Definition
| going from soil solution to soil solids |
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Term
| the phase change that occurs in soils during desorption |
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Definition
| going from solid phase to soil solution |
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