| http://www.w3.org/ns/prov#value | - Repeated analyses of a sample yielded a standard deviation of less than 0.08???.[18] According to the model of plant carbon isotope discrimination by Farquhar et al. [1982], plant ??13C depends on a stomatal conductance (g) and photosynthetic rate (A), which are affected by environmental factors such as light intensity, relative humidity, temperature, and soil moisture.
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