“三看”即看天看地看庄稼,根据天气状况、土壤墒情、庄稼需水要求,进行合理灌溉。看天:天气预报是看天灌水的一项重要依据。也可以根据当地农谚预测降雨情况。对于干旱的土壤来说,中雨大雨能立刻解除干旱,微雨、小雨则作用不大。根据要灌增产水,不灌救 “Three look” is to look at the sky to see crops, according to the weather conditions, soil moisture, crop water requirements, reasonable irrigation. Look at the weather: weather forecast is an important basis to see days of irrigation. Rain forecasts can also be based on local farming proverbs. For arid soil, moderate rain and heavy rain can immediately relieve the drought, light rain, light rain is not much effect. According to irrigation water production, no irrigation