Calibration of β Gauges for Determining Leaf Water Status

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Science  01 Jul 1966:
Vol. 153, Issue 3731, pp. 78-79
DOI: 10.1126/science.153.3731.78


The recent development of β gauges for the indirect determination of the water status of plants has had a widespread impact on plant ecological-physiological research. Calibration of these instruments has, however, been tedious and cumbersome, involving repeated simultaneous measurements of β absorption and leaf water content. This procedure can be much simplified, as long as the β absorption at a single known relative water content is measured, together with the turgid and dry weights of a sample of leaf discs.