Ability of the newly-calibrated homographic model to predict data behind six published models. Species used to parameterize the published models are indicated, as well as the reference of publication. Model performance was assessed using both coefficient of determination (R2) and Root Mean Square Error of Prediction (RMSEP).
Relationships between leaf chlorophyll content (μg cm−2) and SPAD units for 13 neotropical trees. Specific homographic models were parameterized for each species. The number of samples per species (n), the parameters of the homographic models (α and β) and the coefficient of determination (R2) are provided in Table I.
© INRA, EDP Sciences, 2010