Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| Erosion Control Practices |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
*thick, dark surface horizon with good structure
*50% base saturation
*carbon nitrogen ration of <17 or <13
*low soluble phosphorous |
|
|
Term
|
Definition
| mollic epipedon except high in soluble phosphorus due to intensive farming and fertilizer application |
|
|
Term
|
Definition
comparable to mollic epipedon in color, OM, and thickness
*<50% base saturation (more acid pH)
*carbon nitrogen ratio of >17
*poor structure, so massive when dry |
|
|
Term
|
Definition
| thin surface horizon low in organic matter, and light in color with poor structure |
|
|
Term
|
Definition
| a human-made surface horizon >20 inches thick. produced by continuous manuring practices in western europe. |
|
|
Term
|
Definition
| zone of eluviation- horizon from which clay, iron, or aluminum is leached |
|
|
Term
|
Definition
| a layer from which clay, humus and iron oxides have been removed so that the silt and sand particles determine the color of the horizon. |
|
|
Term
|
Definition
| subsoil, zone of illuviation, horizon where clay, iron, aluminum, and humus may accumulate or color and structure may develop without any of the above characteristics |
|
|
Term
|
Definition
| (Bt) an illuvial horizon in which silicate clays accumulate so that the subsoil has at least 1.2 times greater clay content than the surface horizon |
|
|
Term
|
Definition
| (A or B) layer of clay and humus beneath the plow layer. |
|
|
Term
|
Definition
| (Btn) an argillic horizon with prismatic or columnar structure and which has > 15% saturation of exchangeable sodium |
|
|
Term
|
Definition
| (Bhs) an illuvial horizon of hydrous oxides and humus |
|
|
Term
|
Definition
(Bw) chanced or altered zone evidenced by color differences and structural development.
*a soil with a texture of loamy very fine sand or finer
*contains feldspars, micas or other weatherable minerals and shows little of the original rock structure |
|
|
Term
|
Definition
(Bo) an intensively weathered horizon in which no weatherable minerals remain.
*>15% 1:1 silicate clay (kaolinite and hydrous oxides) |
|
|
Term
|
Definition
| (m) and indurated, cemented horizon |
|
|
Term
|
Definition
| (x) an uncemented, brittle subsoil horizon |
|
|
Term
|
Definition
| (k) a layer of accumulated calcium or magnesium carbonates |
|
|
Term
|
Definition
| (k) a layer of accumulated calcium or magnesium carbonates |
|
|
Term
|
Definition
| (z) accumulation of soluble salts |
|
|
Term
|
Definition
| highly decomposed organic matter |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| dense unconsolidated materials |
|
|
Term
|
Definition
| intermediate decomposed OM |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| illuvial accumulation of OM |
|
|
Term
|
Definition
|
|
Term
|
Definition
| accumulation of carbonates |
|
|
Term
|
Definition
| cementation or induration |
|
|
Term
|
Definition
|
|
Term
|
Definition
| accumulation of Fe & Al oxides |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| weathered or soft bedrock |
|
|
Term
|
Definition
| illuvial accumulation of Fe & Al oxides |
|
|
Term
|
Definition
| accumulation of silicate clays |
|
|
Term
|
Definition
|
|
Term
|
Definition
| distinctive color or structure |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| accumulation of soluble salts |
|
|
