Plant Production Science
Online ISSN : 1349-1008
Print ISSN : 1343-943X
( Short Report )
Comparison and Standardization among Chlorophyll Meters in their Readings on Rice Leaves
Jianliang HuangShaobing Peng
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2004 Volume 7 Issue 1 Pages 97-100

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Abstract
Six chlorophyll meters (SPAD) were compared to determine the magnitude of differences in SPAD readings on rice leaves. Correlations among the six SPAD meters were statistically significant (P<0.01) with correlation coefficients (r) ranging from 0.971 to 0.990. However, the differences in SPAD readings were statistically significant among the six meters (P<0.05) and the difference between two meters was as large as 2.7 units. Such magnitudes of discrepancy should be considered when different SPAD meters are used in the same study.
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© 2004 by The Crop Science Society of Japan
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