Principles and Mechanism of Strip Cropping
When sloping land is planted exclusively to wide-spaced row crops like maize, cotton, or sorghum, severe rainstorms wash unprotected soil down the slope, accelerating gully and sheet erosion.
Strip cropping counteracts this by dividing the field into alternating horizontal strips. Erosion-resisting close-growing crops (like legumes, clover, alfalfa, or grasses) act as natural living vegetative filters, catching sediment washed from the row-crop strips above.
- Alternating strips: Alternating wide-row crops with dense-canopy cover crops across the field
- Sediment entrapment: Close-growing vegetative strips slow runoff and trap eroded soil particles
- Infiltration boost: Increases rainwater infiltration, raising root-zone soil moisture reserves
- Erosion reduction: Reduces topsoil loss by up to 60 to 75 percent compared to continuous row monoculture
Major Types of Strip Cropping Systems
Depending on terrain topography, wind exposure, and agricultural layout, farmers adopt specific strip cropping configurations.
Contour strip cropping is suited for rolling topography, while field and buffer strip cropping address irregular hillsides or flat wind-swept plains.
- Contour Strip Cropping: Crops arranged in strips running along established elevation contour lines across rolling hills
- Field Strip Cropping: Uniform parallel strips running across the general slope where topography is too irregular for exact contours
- Wind Strip Cropping: Straight uniform strips oriented perpendicular to prevailing erosive winds on flat arid plains
- Buffer Strip Cropping: Permanent strips of perennial grass or legume turf established on steep, highly erodible slope sections
Crop Pairings and Agronomic Management
Successful strip cropping requires pairing cash row crops with compatible, fast-growing cover crops or leguminous pulses that enrich the soil profile with biological nitrogen.
Strip widths typically range from 15 to 45 meters, calculated based on hillside slope gradient, rainfall intensity, and the operational width of modern farm implements like seeders and combines.
- Recommended pairings: Corn/Maize paired with Soybean or Cowpea; Cotton paired with Green Gram or Groundnut
- Strip width: 15 to 30 meters on steeper slopes; 30 to 45 meters on gentler slopes matched to tractor implement swaths
- Rotation protocol: Rotate crop positions between strips every 2 to 3 years to break pest and disease cycles
- Watershed adoption: Promoted under ICAR soil conservation guidelines for rainfed hill farming systems
Official source
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Indian Institute of Soil and Water Conservation (ICAR-IISWC) ↗Related on KisanPe
Common questions
How does strip cropping prevent soil erosion on sloping land?
Dense close-growing cover crop strips act as living vegetative filters that slow water runoff velocity and trap suspended soil particles eroded from row crop strips above.
What is the difference between contour strip cropping and wind strip cropping?
Contour strip cropping follows elevation contour lines to control water erosion on slopes, while wind strip cropping runs perpendicular to prevailing winds to prevent wind erosion on flat plains.
What crops are ideal for erosion-resisting strips?
Dense, close-canopy crops such as alfalfa, cowpea, green gram (moong), groundnut, clover, and perennial grasses provide excellent soil binding and sediment trapping.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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