GEOG M107 Chapter Notes - Chapter 5: Natural Resources Conservation Service, Tillage, Soil Structure
Document Summary
The soil is loose, finely divided, and dry. The soil surface is smooth and bare. How erosion may be curtailed or eliminated: The soil is compacted, kept moist, or made up of stable aggregates or clods large enough to resist the force of wind. The soil surface is roughened or covered by vegetation/vegetative residue. The wind near the ground is somewhat reduced. Humid areas: wind can cause severe damage to sandy soils (specifically, seacoasts), to muck soils, and to medium/fine-textured soils that are stripped of vegetative cover. Suspension: soil particles and aggregates less than 0. 05mm in diameter (silt size and smaller) are kept suspended by the turbulence of air currents. Suspended particles do not drop out of the air in quantity unless rain washes it out or the velocity of wind is reduced. Saltation: intermediate-sized grains (0. 05mm to 0. 5mm in diameter) move in a series of short leaps.
