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Abstract: A relatively new method for monitoring moisture levels during the crop is Time Domain Reflectometry using buried probes to sense moisture changes without disturbing the substrate or casing. An improved understanding of these probes showed their usefulness for measurements in situ where it was shown that the substrate moisture changes. Results from more than five crops showed a limited conelation between time domain reflectometry readings to samples of wet-basis gravimetric moisture content; however, consistent response of the probes to the watering events was demonstrated. Water movement out of the casing and substrate was shown to vary depending on the quantity of mushroom harvested each day during a break. A time domain reflectometry probe system would enable researchers to monitor substrate and casing moisture, in replication, during the rapid moisture changes associated with sporophore production.
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