Alley Cropping & Balance Trees & Crop
Plans hedgerows
“Power users leave notes. That is how you can tell the power users.
Enter field size, alley width and tree spacing to see how many hedgerows and trees you need and how much crop area remains between them in an agroforestry layout.
Design your alley layout
Next: set out 7 hedge rows 8 m apart with trees every 2 m (217 trees), leaving 3,597 m² in crop alleys.
Estimates assume a roughly square field; real fields, contours and headlands change the row count. Pick nitrogen-fixing or fodder hedge species for best alley synergy.
Alley cropping — key facts
- System
- crops in alleys between tree hedges
- Hedges fix
- nitrogen (when leguminous)
- Hedges give
- fodder, mulch, erosion control
- Hedgerows
- more with narrower alleys
- Wider alleys
- more crop area
- Narrower alleys
- more trees
- On slopes
- plant along the contour
- Privacy
- Runs in your browser; nothing uploaded
Trees in the rows, crops in the alleys
Alley cropping grows annual crops in wide alleys between hedgerows of trees or shrubs — an agroforestry system that stacks benefits on one field. The hedges fix nitrogen, supply fodder and leafy mulch when pruned, and on slopes check erosion and run-off, all while the crops keep producing food or income in the alleys. The whole design turns on alley width: wider alleys mean more crop area, narrower alleys mean more trees and more of their benefit.
This tool gives the hedgerows, trees per row, total trees and crop area from your field size, alley width and tree spacing. Use it to design the layout, order the right number of hedgerow seedlings, and see exactly how much land stays in annual crops. Pair it with the Intercropping LER, Windbreak & Shelterbelt and Orchard Tree Spacing tools to plan the whole tree-and-crop system.
Balance trees & crop
Set alley width to suit your goal.
Order the seedlings
Know total trees before you plant.
Build soil & fodder
Hedges fix nitrogen and give mulch.
Guard against erosion
Contour hedges slow run-off on slopes.
Frequently Asked Questions
What is alley cropping?+
Alley cropping is an agroforestry system where crops are grown in wide alleys between rows of trees or shrubs — the hedgerows. The crops occupy the open alleys while the woody hedges line them, combining annual food or fodder crops with the long-term benefits of trees on the same piece of land.
What do the hedgerows do?+
The tree or shrub hedges fix nitrogen (when leguminous), supply fodder and leafy mulch when pruned, provide fuelwood or poles, and — especially on slopes and contours — check soil erosion and run-off. Their prunings are laid in the alleys to feed the crop, so the hedges improve the soil while the crops grow alongside.
How are hedgerows and trees calculated?+
The number of hedgerows depends on the alley width: narrower alleys fit more hedgerows across the field, wider alleys fewer. Trees per row come from the in-row tree spacing and the field length, and total trees = hedgerows × trees per row. The crop area is what's left in the alleys after the hedgerow strips are subtracted.
How does alley width affect the layout?+
Alley width is the main trade-off. Wider alleys leave more crop area and less competition from trees, but fewer hedgerows and less of their benefit. Narrower alleys pack in more trees for more fodder, mulch and erosion control, but cut into crop area and can shade the crop. The calculator shows both sides so you can pick a balance.
Why intercrop trees with crops at all?+
Mixing trees and crops on one field spreads risk and stacks benefits: the crop gives short-term food or income while the trees build soil, supply fodder and wood, and protect against erosion and wind. On degraded or sloping land, alley cropping can keep ground productive where sole cropping would steadily lose soil.
What trees are used in the hedgerows?+
Fast-growing, coppicing, often nitrogen-fixing species are favoured — leucaena, gliricidia, calliandra, sesbania and similar — because they regrow quickly after pruning and feed the alley with nitrogen-rich mulch. The choice depends on climate, soil and whether you want mainly fodder, mulch, fuelwood or erosion control.
Does it work on slopes?+
Yes — on slopes the hedgerows are usually planted along the contour so they act as living barriers that slow run-off and trap soil, building up natural terraces over time. Contour hedgerows are one of the most effective uses of alley cropping for conserving soil on hilly farmland.
What does this calculator output?+
From your field size, alley width and tree spacing it gives the number of hedgerows, trees per row, total trees, and the crop area remaining in the alleys. That lets you plan how many seedlings to raise, how to lay out the hedges, and how much land stays in annual crops under the agroforestry design.
Are the figures exact?+
They're planning estimates for a regular layout. Real fields have irregular shapes, headlands, gaps and varying terrain, so trees and crop area will differ a little on the ground. Use the figures to design the system and order seedlings, then adjust the spacing to fit the actual field.
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