TLE 6

​The trees are usually distanced apart at right angles to each other, with a tree on the corner of each square.

​The square may be modified by making the rows farther apart from east to west than north to south, permitting the maximum access of sunlight to the trees.

​This system brings the permanent trees in the adjacent row, not opposite the trees in the adjoining, but opposite the center of the spaces between the trees.

​Permanent trees are planted on each corner of the square. A filler or semi-permanent tree may be placed in the center of the square. This is a desirable system to follow when a smaller temporary variety is raised in the center and which will be pulled out in the future, thus leaving the permanent trees in the square. This will enable more trees to be planted.

​This technique gives growers the opportunity to use areas that are vulnerable to erosion like hillside. Trees planted in parallel rows that contour around a landscape help control erosion and retain moisture. Terraces are also a form of contour planting.