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　　春天一来，商(shāng )都县农牧和科技局局(jú )长庞学(xué )峰便忙于入农(nóng )户、进(jìn )田(tián )头，落实低耗水(shuǐ )作物种(zhǒng )植(zhí )计(jì )划。“从前(qián )都(dōu )是(shì )把旱地改(gǎi )良为水(shuǐ )地，提高(gāo )农业(yè )单产。现在(zài )‘水改旱’，只为保(bǎo )护(hù )察(chá )汗淖尔(ěr )湿地。”