Research results showed that the surface shape factor was not a constant value, but a variable value with the change of irrigation time, water advance distance and other factors.
研究表明同一次畦灌过程中地表储水形状系数并非恒定值，而是随灌水时间和水流推进距离等因素变化的。
The optimal irrigation time and period for sunflower were designed.
确定了向日葵最佳灌水次数和灌水时段。
It is based on actual evapotranspiration capacity, effective rainfall and water reserve of soil to forecast irrigation time.
以实际蒸发蒸腾量、有效降雨量和土壤贮水量来预报未来灌水时间。
It is based on actual evapotranspiration capacity, effective rainfall and water reserve of soil to forecast irrigation time.
以实际蒸发蒸腾量、有效降雨量和土壤贮水量来预报未来灌水时间。
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