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When to turn on the tap

机译：何时开启水龙头

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Scheduling your irrigation using a computer model is one way to make every drop count. Efficient use of water is now firmly on the UK agenda as agriculture competes with the demands of the domestic supply industry, leisure and other sectors to use this resource. Estimates vary as to how many farmers properly schedule their irrigation but it can be put as low as 50 percent for some crops such as potatoes. What is clear is that not all water applied for irrigation purposes is actually reaching its target. Research shows as much as 15-20 percent of water leaving the nozzle of rain guns never reaches the ground at which it is targeted. Soil variation and a multiplicity of local weather conditions make it difficult to plan irrigation in the UK by following guidelines based simply on past weather records. Basing irrigation applications on real-time information would in theory mean that growers have to keep accurate on-going records of their own fields each season. In practice, they are unable to do sowith accuracy or simply dislike the task of taking numerous measurements of soil moisture. The alternative is irrigation scheduling based on computer modelling.
机译：使用计算机模型来计划灌溉是计算每个滴数的一种方法。随着农业与国内供水业，休闲业和其他部门使用该资源的需求竞争，有效用水已成为英国的紧迫议程。关于有多少农民适当安排灌溉的估计数各不相同，但对于某些农作物（例如土豆），则可以低至50％。清楚的是，并非所有用于灌溉目的的水实际上都已达到其目标。研究表明，离开雨水枪喷嘴的水多达15％至20％从未流向目标水。由于土壤变化和当地多种天气条件，很难仅根据过去的天气记录来遵循指导方针来计划英国的灌溉计划。理论上，基于实时信息进行灌溉应用意味着种植者必须在每个季节保持其自己田地的准确持续记录。实际上，他们无法做到如此精确，或者根本不喜欢对土壤水分进行大量测量的任务。替代方案是基于计算机建模的灌溉计划。

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