The development and distribution of colour in a soil profile result from chemical and biological weathering, especially redox reactions.
22.
The dispersive portion of a soil profile is generally confined to the subsoil, where soil-forming processes concentrate clay minerals and sodium.
23.
The vertical section exposing a set of horizons, from the ground surface to the parent rock, is termed a soil profile.
24.
Acidification occurs when these elements are leached from the soil profile by rainfall or by the harvesting of forest or agricultural crops.
25.
But perhaps most importantly, tree fallows protect soil against physical erosion and draw nutrients to the surface from deep in the soil profile.
26.
In swales and depressions where runoff water tends to concentrate, the regolith is usually more deeply weathered and soil profile development is more advanced.
27.
Permanent pasture systems also have deeper, well established forage root systems which are more efficient at taking up nutrients from within the soil profile.
28.
Agricultural practices such as fertilizer amendments and tillage can change the spatial distribution of resources, resulting in altered exoenzyme activity in the soil profile.
29.
Near the highway, the change of vegetation is particularly visible near the stream at Donz�re, particularly due to the change of the soil profile.
30.
Soils geomorphologists investigate soil profiles and chemistry to learn about the history of a particular landscape and understand how climate, biota, and rock interact.
