Tillage Erosion Model
Also known as: Tillage soil loss, Soil redistribution model, Erosion prediction
Tillage Erosion Model is a physical transport and modeling pipeline for predicting soil movement and redistribution caused by tillage operations on sloping land. Developed by soil scientists (Lindstrom, Nelson, Lobb) in the 1990s–2000s, this method quantifies how plowing, disking, and other soil-disturbing implements physically move soil downslope, leading to long-term productivity loss on upper slopes and soil accumulation in valleys.
Key highlights
- Quantifies a 'hidden' form of erosion often overlooked in water-erosion-focused conservation planning.
- Identifies field positions at highest risk, prioritizing where conservation measures are most cost-effective.
- Supports long-term planning: tillage erosion is slow but cumulative; decades of planning are needed to prevent catastrophic soil loss.
- Works in all climates: independent of rainfall, affecting semiarid and dry regions equally.
Intuition
This section is available to Pro members. Upgrade to Pro
How it works
This section is available to Pro members. Upgrade to Pro
When to use it
Use this method on sloping land (>2% slope) where tillage-based agriculture has occurred for >5 years. Essential before designing conservation systems or evaluating sustainability of current practices. Useful for agricultural land evaluation, soil mapping, or erosion control planning in rainfed regions vulnerable to soil loss.
Strengths & limitations
- Quantifies a 'hidden' form of erosion often overlooked in water-erosion-focused conservation planning.
- Identifies field positions at highest risk, prioritizing where conservation measures are most cost-effective.
- Supports long-term planning: tillage erosion is slow but cumulative; decades of planning are needed to prevent catastrophic soil loss.
- Works in all climates: independent of rainfall, affecting semiarid and dry regions equally.
- Requires detailed field topographic survey; coarse elevation data lead to biased flux estimates.
- Model parameters (erodibility factor) vary with soil moisture and condition; laboratory values may not match field performance.
- Does not account for wind erosion or chemical weathering, only mechanical transport.
- Long time scale to observe and validate predictions; field-scale measurements over decades are rare.
Common pitfalls
This section is available to Pro members. Upgrade to Pro
Applications
This section is available to Pro members. Upgrade to Pro
Frequently asked
How much soil is typically moved by a single plow pass?
A moldboard plow displaces roughly 20–100 kg/m of soil downslope per pass, depending on implement width and soil texture. Fine-textured, moist soils move more than coarse or dry soils. Cumulative annual displacement: 0.5–2 mm of topsoil on moderate slopes (5–10%) with typical annual tillage.
Can reduced or no-till farming stop tillage erosion?
Yes, completely. Erosion occurs only with soil-disturbing implements. No-till systems eliminate mechanical translocation, allowing natural soil formation to slowly restore profiles. However, transition from conventional to no-till must account for existing soil depth variation; shallow hilltops may have insufficient root zone depth initially.
How do I measure tillage erosion in my field?
Dig soil pits at hilltop, mid-slope, and lower slope positions, measuring soil depth to bedrock or clay layer. Compare to historical records or photographs if available. A simple proxy: soil depth decreases by ~5–10 cm from lower to upper slope positions in conventionally tilled fields (vs. <2 cm in no-till or level land).
Is contouring effective at reducing tillage erosion?
Contouring (plowing parallel to contours rather than up-and-down slope) significantly reduces downslope transport, cutting erosion by 50–80% depending on slope angle. Combined with contour-bunding or terraces, effect is larger. Contouring is labor-intensive and requires accurate leveling, but is effective long-term conservation.
Sources
- 1.Lindstrom, M. J., Nelson, W. W., & Schumacher, T. E. (1992). Soil movement by tillage as affected by slope. Soil Science Society of America Journal, 56(4), 1104-1108.
- 2.Lobb, D. A., Kachanoski, R. G., & Miller, M. H. (2003). Tillage translocation and tillage erosion as processes of soil redistribution on agricultural hillslopes. In Soil Erosion Research for the 21st Century: Proceedings of the International Symposium (pp. 15-17).
You have read it. What now?
Cite this page
ScholarGate. (2026, June 3). Tillage Erosion Model. ScholarGate. https://scholargate.app/agronomy/tillage-erosion-model