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At every 12-inches an ECHO moisture probe (Left -manufactured <br />by Decagon Devices) is installed. (Below) In addition to the Echo <br />°•• <br />moisture probe an HDU (Soil suction Senor — manufactured by <br />Campbell Scientific, was also installed). Every 6-12 inches, the <br />Soils were compacted and moisturized and tested. <br />i <br />]S tt i <br />{ <br />Ik <br />' k <br />