This seems like it would be inefficient at both types of harvesting. Also the amount of pesticides and extra nutrients sprayed onto crops would cause algae blooms in the water and kill everything else.

Unless this is specifically designed as a low yield eco thing, in which case we’d need many multiples of land used to achieve the same output.

There’s a reason the world population has exploded in the last few decades, without 10x the number of farms.