Generally speaking this will work, yes! Plants use more water during active photosynthesis, and unsurprisingly, water evaporates faster in the open sun. But lo

Generally speaking this will work, yes! Plants use more water during active photosynthesis, and unsurprisingly, water evaporates faster in the open sun. But logistically, on-demand shading of whole fields is quite challenging. And not all crops will be robust to being grown in the shade (for varying levels of shade).