春天一(yi)来，商都县农(nong)牧(mu)和科(ke)技局局长庞学(xue)峰(feng)便忙于入(ru)农(nong)户、进田头，落实低耗水作物种(zhong)植(zhi)计(ji)划。“从前都(dou)是把(ba)旱地改良为水(shui)地，提高农(nong)业单产。现在‘水改旱’，只(zhi)为保护察(cha)汗淖(nao)尔(er)湿(shi)地。”