How does tillage affect wind and water erosion ?
• How does saltation or rain drop impact affect erosion ? Clay and humus, soil colloids 3, act as adhesives that bind together silt and sand grains in to aggregates. Soil aggregates 1 are difficult to transport and less easily eroded than mineral grains by themselves. Soils naturally low in clay (loess deposits) or humus are more erodable because they lack of adhesives makes it easier to detach and transport mineral grains. The impact of rain drops 1, or bouncing mineral grains (saltation 1), or tillage can destroy aggregates and detach mineral grains for subsequent transport.
