This is a nice simple example of how to farm intelligently working with the sun together with nature. The next step on from this is solar powered biodomes and greenhouses made with glass which is partially active for the part of sunlight not used by plants (the plants get all the energy not captured by the solar active glass) , that could be used to grow things in all the "wrong" areas, like deserts, and places nearer to north/south poles, to grow tropical fruits etc.