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Proceedings of the International Plant Propagator's Society

Vol. 30


Robert A.M. Campbell

pp: 620-621

In the past, moisture-sensing has been carried out in different ways. These include the use of time clocks or balance devices of many types, all with their built-in inaccuracies. We have now entered an electronic age and plant propagators should be availing themselves of this sophistication. Simple electronic devices enable the propagator to control moisture to the cuttings, with light and temperature variations being two of the major factors that have to be considered.

Types of devices currently used include time control with light sensing. This device has a misting duration period in seconds and an interval between misting periods in minutes. Also included is a light sensing cell (UV sensitive). The light sensor enables the cycle period between misting to be increased up to two hours during darkness. Timing equipment is normally used in controlled environment propagation houses and multi-station controllers are available.

Carbon leaf devices sense moisture level at the cuttings. Fine

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