Abstract
Hedgrow intercropping (alley cropping) is a relatively new technology involving growing agricultural crops between rows of planted tree species. Leucaena is the most widely studied tree species for the practice and research has indicated that it can yield over 200 kg ha−1 year−1 of nitrogen for application in the alleys where crops are planted. More herbage (and nitrogen) are obtained from narrow alleys, and crops utilise the nitrogen better if the prunings are incorporated into the soil before planting. Low pruning heights may prevent shading of the crops.
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