When googling "water harvesting" I found an African site which had lots of
water catchment berms used for growing trees. I thought I'd adapt that
concept in an easier way and create a diamond pattern on my sloping crop
fields using the half V trencher instead of so many berms, like a cocked
tic-tac-toe board or a giant piece of graph paper on a slight rotation off
alignment with the slope. Thus we could plant all shade and orchard trees in
the intersections and all extra unabsorbed water in that 'quadrant' would be
channelled by the surrouding half V trenches directly to the trees, thus
multiplying the use of rain- as if several times the rainfall had occurred.
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