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Farming System · Farming system

Contour Farming

Also known as: Contour cultivation, Contour cropping

Contour farming plants and cultivates crops in rows that follow the natural contour lines of sloped land rather than running up and down the slope, slowing water runoff and reducing soil erosion.

Dated referenceLast reviewed: 2026-07-12Updated: 2026-07-12
Contour farming on a slope
Arian Zwegers from Brussels, Belgium, via Wikimedia Commons (CC BY 2.0) CC BY 2.0 (opens in a new tab) source (opens in a new tab)Downloaded from Wikimedia Commons; resized to a maximum width of 1280 px and recompressed as JPEG for web delivery. Content unaltered.

On sloped fields, rows planted across the slope, following its contour lines, act as small barriers that slow the velocity of surface runoff, allowing more water to infiltrate and trapping sediment before it moves downslope. This contrasts with rows planted up and down the slope, which can channel water and accelerate erosion.

Contour farming is often combined with other erosion-control practices, such as strip cropping, terracing, or grassed waterways, on steeper terrain. Its effectiveness depends on slope gradient and length, soil type, and rainfall intensity, so it is one tool among several for managing erosion risk rather than a complete solution on its own.

How contour farming works

Fields are surveyed or mapped to identify contour lines, and tillage, planting, and cultivation operations follow those lines rather than farm boundaries or the fall of the slope.

  • Rows planted along the contour create small ridges and furrows across the slope
  • These ridges act as mini-barriers that slow runoff and encourage infiltration
  • Contour lines are typically established using surveying equipment or elevation data

When it is most effective

Contour farming provides the most erosion-control benefit on gentle to moderate slopes; on steep or long slopes, runoff can still gain enough volume and speed to overtop contour ridges unless combined with additional measures.

Slope conditionTypical approach
Gentle slopesContour farming alone may substantially reduce erosion
Moderate slopesOften combined with strip cropping or cover crops
Steep or long slopesUsually requires terracing or additional structural measures
Typical erosion-control approach by slope condition

Principles and practices

  • Surveying and marking contour lines before establishing row patterns
  • Adapting row spacing and field layout to the mapped contours
  • Maintaining vegetative cover or residue to reinforce runoff control
  • Combining with reduced tillage or cover crops for added erosion protection

Benefits and trade-offs

  • Reduces surface runoff velocity and associated soil loss on sloped cropland
  • Can increase water infiltration, benefiting soil moisture availability
  • Relatively low-cost to implement compared with structural measures like terracing
  • Benefit diminishes on steep or long slopes without added structural measures
  • Field layout constraints can complicate machinery operation on irregular terrain
  • Does not eliminate erosion risk during high-intensity rainfall events

Where contour farming is used

Contour farming is used on sloped cropland worldwide, particularly across hilly grain and row-crop regions where erosion control is a management priority.

Relationships

Evidence-backed connections in the knowledge graph.

Includes crops

Related topics

Scope & limitations

Geographic scope: Applicable on sloped cropland worldwide; effectiveness depends on local slope, soil, and rainfall characteristics.

  • Benefits diminish on steep or long slopes without additional structural measures such as terracing.
  • Does not eliminate erosion risk during high-intensity rainfall events; no universal erosion-reduction figure is given.

Sources

This article draws on the following authoritative sources. See our sources & methodology for how they are selected.

  1. [1]USDA NRCS — Natural Resources Conservation Service (opens in a new tab)

    USDA Natural Resources Conservation Service (NRCS)

    Authoritative

    Cited for: Contour farming practice standards and erosion control

    Type:
    Government agency
    Jurisdiction:
    United States
    Accessed:
    2026-07-12
  2. [2]FAO — Food and Agriculture Organization (opens in a new tab)

    Food and Agriculture Organization of the United Nations (FAO)

    Authoritative

    Cited for: Soil conservation practices on sloped cropland

    Type:
    Intergovernmental organization
    Jurisdiction:
    Global
    Accessed:
    2026-07-12
  3. [3]FAO — Soils Portal (opens in a new tab)

    FAO Global Soil Partnership

    Authoritative

    Cited for: Soil erosion processes and management context

    Type:
    Intergovernmental organization
    Jurisdiction:
    Global
    Accessed:
    2026-07-12
  4. [4]Cornell CALS — Plant pathology and crop resources (opens in a new tab)

    Cornell University College of Agriculture and Life Sciences

    High

    Cited for: Field layout and conservation practice guidance

    Type:
    University extension service
    Jurisdiction:
    United States (New York)
    Accessed:
    2026-07-12

Related topics

Soils