A FIELD SYSTEM FOR AUTOMATICALLY MEASURING SOIL WATER POTENTIAL

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Abstract
A system that will automatically read soil tensiometers is described. The system uses a vacuum transducer on each tensiometer whose output voltage varies linearly with the amount of tension in the tensiometer. A data logger is programmed to scan the transducers at selected intervals and record the information on cassette tape. The information is then transferred to a large computer for calculations and plotting of soil water potential with time. The system is battery-operated, weatherproof and suitable for use under field conditions.

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