Wind Erosion as Affected Soil Temporal Variation.

The wind erosion prediction system (WEPS) requires information about numerous spatial and temporal variables and complex interactions that affect erosion, particulate matter (PM 10 and 2.5) generation, and nutrient loss. Abrasion of clods and crusts, aggregate slaking, and dispersion during wind and water erosion create additional saltation and suspension-size aggregates. The rate of abrasion loss from clods and crust has been related to the aggregate stability and crushing energy. However, the splits among saltation, suspension and PM10/2.5 created by abrasion, slaking or dispersion are not known for range of soils types. The coefficient of breakage, which represents the rate saltation/creep is broken to suspension-size aggregates also varied significantly among the soils. Thus to improve the WEPS, additional experimental data are needed to relate the soil surface characteristic (roughness, moisture content, aging, etc.) to aggregate/particle size distribution of the abraded material to both intrinsic and temporal soil properties for a wide range of soils under different cultivation and amendment treatments.In this study we plan to report (i) the role of intrinsic soil properties, extrinsic conditions and amendments on dry and wet soil aggregate stabilities and PM generation; and (ii) the affect of soil amendments or waste materials (biosolids, PAM and gypsum) on soil surface stabilization for wind erosion control.