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Get started with soil moisture monitoring

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How close a crop is to running out of available soil moisture... "PAWC is the difference between the drained upper limit (DUL), also known as the field capacity, which is the highest moisture content the soil can store before water runs off or drains away, and the crop lower limit (CLL), which is the lowest moisture content that plant roots can extract from soil," he said... "If soil moisture is above the DUL, no more water can be held in the soil so additional rain or irrigation will not be of benefit and can lead to waterlogging and surface runoff...
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