My understanding is that for commercial rice production, the paddies are drained both for planting and before harvest. I may be wrong on that. Either way, the

My understanding is that for commercial rice production, the paddies are drained both for planting and before harvest. I may be wrong on that. Either way, the machinery used for planting corn and soybeans is developed for use on relatively dry ground. And the plants themselves cannot survive submersion for long periods of time.