| A | B |
|---|
| soil | the layer of natural maerials on the eaths surface |
| soil classification | a system to describe the characteristics of a given soil |
| soil drainage | the ability to allow water to move through soil and out of the soil |
| soil horizons | layers in the mature soil |
| soil survey | a document classifying all of the soils in a given geographical area |
| soil survey report | a document prepaired as a result of the scientific examination and classification of a land area |
| slope | the change in elevation for a given horizon distance of the earths surface |
| organic matter | dead plant and animal material in various stages of decay |
| parent material | those material underlying the soil from which the soil was formed |
| loess deposit | windblown soil deposits |
| alluvial deposits | soil deposited by moving water |
| marine deposit | a layer of parent material deposited ofer time at the floor of an ocean or sea |
| weathering | the process of breaking down rock and minerals |
| original tissue | partially decomposed organic matter which still retains recognizable characteristics |
| humus | black or brown substance resulting from the decay of plant and animal matter |
| texture | the relative percetages of sand, silt, and clay in the soil |
| flood hazard | the probability that a flood of a given serverity will occur in a know period of time |
| erosion | the process of the weathering away of the suface layer of anything |
| topsoil thickness | the depth to which topsoil extends in the soil suface |
| land capibility class | description of the ability of a land parcel to prduce crops |
