SOCR Exam 2
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32 terms
Terms | Definitions |
|---|---|
 soil texture | the relative proportions of sand, silt, and clay in a soil |
| 1/radius squared | time of fall for a particle suspended in a fluid |
| V=2gr^2(d1-d2)/9h | stokes law |
| fluid viscosity | h |
| (radius of larger particle)^2/(radius of smaller particle)^2 | time factor |
| colloid | a particle whose diameter is less then 1 micro unit |
| infiltration | water movement into the soil surface |
| percolation | water movement through the soil |
| aeration | air movement through the soil |
| permeability | the movement of gases or water through a soil |
| soil structure | the aggregation of primary soil particles (sand, silt, clay) into secondary particles or "peds" |
| consistence | the combination of soil properties that determine an aggregates resistance to crushing and its ability to be molded or changed in shape |
| flocculation | the combining of small particles (clay and humus) as generally caused by adsorption of certain cations |
| dispersion | the process in which aggregates are broken-up into individual soil separates. Generally caused by Na+ |
| 0-27% Clay | Loam |
| 27-40% | Clay Loam |
| 40-100% | Clay |
| Middle Column | If sand and silt are less than 10% difference |
| Ca, P | apatite |
| Ca,S | Gypsum |
| K | Orthoclase |
| Fe2O3 | hematite |
| Fe(OH)3 | Limonite |
| coenzyme | a metal ion that fits into another enzyme for a metabolic or reproductive process |
| Mg2+ | nutrient used for chlorophyll |
| HPO42- | Nutrient used to ATP and ADP |
| Zn2+ | nutrient used as a coenzyme in plants |
| K | muscovite |
| K,Fe,Mg | biotite |
| Ca | Calcite |
| Ca,Mg | Dolomite |
| Sandy Loam | A soil with 54% sand, 29% silt, 17% clay would most likely be what soil texture? |
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