Why are Agroforestry Systems more Productive?
They use limited resources more efficiently • SUN: Multi-storied cropping systems absorb sunlight at all levels. • SOIL NUTRIENTS: Deep tree roots take up soil nutrients and moisture that are out of reach of root crops. • WATER: Trees shelter crops and soil surfaces from drying winds and intense sun. Tree-leaf mulch retains moisture in upper soil layers. • LAND: Trees serve to continuously sustain rather than periodically rebuild soils. Fallow requirements are reduced, leaving more land in production at any one time. They provide a more favorable environment for sustained cropping: • SHADE: Filtered shade keeps topsoil cool, increasing beneficial soil microbe activity and reducing soil water loss. • WIND PROTECTION: Trees protect the soil and crops from damaging, erosive, and drying winds. • SOIL ANCHORING: Tree roots bind soil, preventing down-slope erosion during rains. • SOIL BUILDING/MAINTENANCE: Tree leaf litter becomes organic humus that builds good soil structure. The stronger s
