春(chun)天一来，商都(dou)县(xian)农牧和科技(ji)局局长(zhang)庞学峰便忙于入农(nong)户、进田(tian)头，落实低耗水作物种(zhong)植计划。“从前(qian)都是把旱地改(gai)良为水地，提高农(nong)业单(dan)产。现(xian)在‘水改旱(han)’，只(zhi)为保护察(cha)汗(han)淖(nao)尔湿地(di)。”