| A | B |
|---|
| bulk density | mass of oven-dry soil per unit volume |
| caliche | a zone of soil, near the surface, that is cemented by lime |
| claypan | a dense sunsoil layer with a higher clay content than the soil above it |
| clods | a user-made soil aggregate, produced by tillage when a soil is too wet or dry |
| compaction | the squeezing together of soil particles by the weight of farm or construction equipment |
| friable | a consistency term, expressing how easily a moist soil can be crumbled |
| gleying | a process or condition of reducing conditions indicated by the presence of gray and mottled gray colors in a soil horizon |
| infiltration | downward entry of water into the soil |
| loam | a medium soil texture class, in which sand, silt, and clay contribute almost equally to soil properties |
| massive soil | a structureless soil in which each soil particle sticks to neighboring particles |
| mottling | spots of different colors in a soil, usually indicating poor drainage |
| particle density | the mass per unit colume of soil particles, excluding pore space |
| permeability | ease with which gases, liquids, and plant roots pass through a specific mass of soil |
| puddling | dispersal of soil aggregates caused by working soil when wet, creating a massive surface layer |
| soil aggregates | a mass of fine soil particles glued together by clay, organic matter, or microbial gums |
| soil consistence | characteristics of a soil in its response or resistance to pressure, as described at various soil moisture contents |
| soil texture | the relative proportion of the soil separates in a soil |
| tilth | physical condition of the soil in terms of how easily it can be tilled, etc. |
