Wet-rice agriculture involves growing rice in flooded paddies and is commonly practiced in tropical regions like China, India, Indonesia, and other Asian countries. It requires flat land, ample rainfall or irrigation, and temperatures over 21°C for the five month growing season. The process involves plowing, transplanting rice seedlings, keeping the fields flooded, ripening, and harvesting. The outputs include varieties of wet rice, manure, and rice seeds for subsistence and commercial farming.