春天(tian)一(yi)来，商都县(xian)农牧(mu)和科技局局长庞学峰便忙(mang)于(yu)入农(nong)户、进田头，落(luo)实(shi)低(di)耗水(shui)作(zuo)物(wu)种(zhong)植(zhi)计划。“从前都是把旱(han)地改良为水地(di)，提高农(nong)业单产。现在‘水改(gai)旱’，只为保护察汗(han)淖尔湿(shi)地。”