Unit 1

A chart consisting of color chips. Color chips are arranged based on HUE, VALUE, and CHROMA.

aggregate of soil particles that display characteristics of that soil sample

a process in while intact water molecules may bind to a mineral

smallest sampling unit that displays the full range of properties characteristic of a particular soil

the ease with which the soil is tilled

describes the size of the soil particles

describes the manner in which the soil particles are aggregated

Usually filled with water. Even when not filled with water, they are usually too small to permit much air movement

formed from other rocks by a process of change called metamorphism. happens when the earth’s plates shift and collide

form when weathering products released from other, older rocks collect under water as sediment and eventually form a new rock

25% air 25% water 45% mineral matter 5% organic matter

the rock exposed at the earth’s surface with has crumbled and decayed to produce a layer of unconsolidated debris overlaying the hard, unweathered rock.

contrasting layers in the soil

a large hole, several meters deep and about a meter wide, to study soil horizons

The vertical section exposing a set of horizons in the wall of the soil pit

the organically enriched A horizon at the soil surface

soil layers that underlie the top soil

usually black or brown. a collection of organic compounds that accumulate in the soil when partially broken down plant and animal residues are protected from complete decay by various factors in the soil environment

Soil measurement below pH 7

soil measurement above pH 7

soil measurement of 7

A reaction with water that splits the water molecule into H+ and OH- ions

process by which molecules of a gas, solid, or another liquid dissolve in a liquid, thereby becoming completely and uniformly dispersed throughout the liquid’s volume

occurs when an atom, molecule or ion loses one or more electrons. Example: iron rusting