| Term | Definition |
|---|
| hue | yellow or reddness |
| value | lightness of darkness |
| chroma | intensity or brightness |
| factors that influence soil colors | organic matter content, water content, oxidation states of iron and manganeese oxides |
| specific surface area | surface area for a given mass of particles |
| sand | have low specific surface areas, and possess little capacity to hold water or nutrients, don't stick together into a coherent mass |
| silt | retains more water than sand, but still does not exhibit much stickiness |
| clay | have large specific surface areas, tremendous capacity to absorb water and other substances, very sticky |
| when particle size decreases | specific surface area increases |
| loam | mixture of sand, silt, and clay particles taht exhibits the properties of those separates in about equal proportions |
| peds | when particles become aggregated together due to various forces at different scales |
| clods | the compressed, cohesive chunks of soil that can form artificially when wet soil is plowed or excavated |
| macroaggregates | aggregates (.25 to 5 mm in diameter) that are composed of smaller microaggregates |
| microaggregates | aggregates that are 2 to 250 micrometers in size. |
| flocculation | the mutual attraction among clay and organic molecules |
| ideal soil | 50% pores, 50% solids |
| micropores | soil pores in which water is strongly retained |
| macropores | soil pores that are typically air filled and drain free of water due to gravitational forces |
Combine with other sets
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