Silvoarable practices or alley cropping are one of the most promising agroforestry practices in Europe and USA were they represents less than 0.5% of the potential arable land. Silvoarable practices integrate crop production with trees or shrubs in the same land management unit. Trees could be homogenously distributed in the plots, or surrounding the plots constituting hedges or hedgerows. When trees are going to be established in the arable lands, it is important to have enough spacing among trees to allow crop mechanization. It is also important to maintain arable practices from the beginning of the tree plantation in order to allow trees to go deeper in soil and anchoring better the trees, which, on the other hand are also benefited by the excess of nutrient that are uptaken by the deeper tree roots than the arable crops tree roots. Moreover, tree lines should be North-South oriented in order to reduce the shade of the trees on the crops when they are East-West oriented, therefore limiting crop production.