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Analysis the effect of region impacting on the biomass of domestic Masson pine using mixed model Goodness Evaluation and Precision Analysis of Tree Biomass Equations Compatible biomass models for main tree species with measurement error in Heilongjiang Province of Northeast China. Comparison of Nonlinear Regression Equation with Intercept and Segmented Modeling Approach for Estimation of Single-Tree Biomass Using Measurement Error Modeling Method to Establish Compatible Single-Tree Biomass Equations System Compatible Tree Biomass Models for Natural White Birch (Betula platyphylla) in Northeast China Forest Area