If the drainage issue were left unaddressed, the first heavy summer rain would soak fields and rot crops. There would be vegetable shortages and prices would soar. In winter, on the other hand, the government actually pays some farmers to plow their crops under. The reason is that winter's more stable weather leads to larger harvests, which push prices down.
但改採新技術的前提是必須先解決農田排水不良的問題，否則夏天一下大雨，菜就爛掉、市場缺貨、菜價上漲；冬天氣候穩定產量高，菜賤傷農，農政單位就要求農友不要採收，直接耕鋤當肥料，再補貼農友損失。