Fig. 3. (A) Comparison of aboveground net primary production (ANPP) on an annual basis with growing season degree days (GSDD). Line is a linear regression, R² = 0.874, p < 0.001. (B) Regression of residuals from ANPP/GSDD relationship with net N mineralization (R² = 0.010, p > 0.1) and (C) soil moisture (R² = 0.010, p > 0.1).