Articles
SOURCES OF VARIABILITY IN CITRUS LEAF TISSUE ANALYSIS RESULTS I. VARIABILITY DUE TO SAMPLE HANDLING METHODS
Article number
175_26
Pages
183 – 188
Language
English
Abstract
Two experiments investigated sources of variability in results of citrus leaf tissue analysis, arising from (i) sample handling, (ii) sample preparation, (iii) cultivar differences, and (iv) crop load effects.
Varying leaf sample handling and preparation techniques resulted in significantly different levels of most nutrient elements and possible improvements to current commercial methods are suggested.
The effect of sample handling on respiration rates of sampled leaves is suggested as a cause for this effect particularly for N, P, K and Ca which showed higher analysis values where sample respiration rate was high.
Leaf sample washing also affected results.
Washing lowered concentrations of Fe, Mn, Zn, Cu and Mg, probably due to removal of surface contaminants.
Varying leaf sample handling and preparation techniques resulted in significantly different levels of most nutrient elements and possible improvements to current commercial methods are suggested.
The effect of sample handling on respiration rates of sampled leaves is suggested as a cause for this effect particularly for N, P, K and Ca which showed higher analysis values where sample respiration rate was high.
Leaf sample washing also affected results.
Washing lowered concentrations of Fe, Mn, Zn, Cu and Mg, probably due to removal of surface contaminants.
Authors
L.S. Lee, J.C. Chapman
Keywords
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