Temperature effects in determinations of leaf relative water content

Differences between field temperature and floating temperature during determination offect apparent leof relative water content (RWC). When floating temperature was lower or higher than field temperature, RWC appeared higher or lower, respectively, than when the temperatures were the same. Discrepancies averaged 0·24% RWC per TC temperature difference for wheat and perennial ryegrass, and 0·33% for the less xeromorphic white clover and potato. These averages might reasonably be used in future for correcting values obtained with these or similar species.