Correction: Fitting and Calibrating a Multilevel Mixed-Effects Stem Taper Model for Maritime Pine in NW Spain
نویسندگان
چکیده
s2i;a1 ,s2i;b3 and s 2 i;a1 b3 , variances and covariance of random effects in parameters a1 and b3 at plot level; s2ij;a1 ,s2ij;b3 and s2ij;a1 b3 , variances and covariance of random effects in parameters a1 and b3 at tree level; σ , residual variance; δ parameter of power function. Note that the σ of the mixed-effects model must be multiplied by g = d when applied (variance obtained from ordinary residuals is 0.6866).
منابع مشابه
Fitting and Calibrating a Multilevel Mixed-Effects Stem Taper Model for Maritime Pine in NW Spain
Stem taper data are usually hierarchical (several measurements per tree, and several trees per plot), making application of a multilevel mixed-effects modelling approach essential. However, correlation between trees in the same plot/stand has often been ignored in previous studies. Fitting and calibration of a variable-exponent stem taper function were conducted using data from 420 trees felled...
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