How contour ploughing protects sloping farmland
- Reduces runoff velocity: Ridges run across the slope, acting as physical barriers that break the speed of flowing surface water.
- Minimizes soil erosion: Traps detached topsoil particles within the furrows, preserving fertile organic matter on the field.
- Boosts subsoil moisture: Enables greater rainwater infiltration, storing critical moisture for crops during prolonged dry spells.
- Prevents gully formation: Eliminates the straight downslope ruts created by conventional ploughing that turn into deep gullies.
Establishing contour lines and field layout
- Identify elevation contours across the slope using an A-frame level, water tube level, or survey marker.
- Begin ploughing along the central guideline contour and work outward, keeping all passes parallel to the contour line.
- Construct contour bunds or vegetative grass barriers at regular vertical intervals on long slopes to reinforce water harvesting.
Implements and tractor operation across slopes
Reversible mouldboard ploughs and disc ploughs are ideal because they can turn soil uphill regardless of travel direction. Tractor operators must exercise caution on steep slopes, using wide wheel track settings and matching equipment weight to prevent side tipping or loss of traction.
Official source
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Common questions
What is the primary difference between contour ploughing and conventional ploughing?
Conventional ploughing often runs up and down slopes, creating natural channels for rainwater erosion, whereas contour ploughing runs across the slope along contour lines to trap water and soil.
On what slope gradients is contour ploughing recommended?
It is most effective on moderate slopes between 2 and 10 percent. On slopes steeper than 10 percent, it is combined with bench terracing and stone bunding.
Does contour ploughing improve crop yields?
Yes, by retaining topsoil, organic matter, and moisture within the field, contour ploughing significantly improves crop yields under rainfed conditions.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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