The crop reference evapotranspiration, estimated from meteorological data with methods such as the Penman-Monteith method recommended by FAO, is useful for precision irrigation decision-making.

• 在估算大气蒸发力方面,以参考作物蒸散量为指标,估计作物参考蒸散量的方法以联合国粮农组织(FAO)最新推荐的Penman Monteith方法较为精细。