春(chun)天一来，商都县农牧(mu)和科(ke)技局局(ju)长庞(pang)学峰便忙于(yu)入农(nong)户、进田头，落实低耗水作物(wu)种(zhong)植(zhi)计划。“从(cong)前都是把(ba)旱地改良(liang)为水地，提高农(nong)业单产。现在‘水改旱(han)’，只为(wei)保护(hu)察汗淖(nao)尔湿地(di)。”