Appendix C. The relationships of response ratio of N:P ratio (RRN:P) with that of N pool or P pool (RRNp or RRPp) in cropland, grassland, and forest ecosystems, respectively, under elevated CO2 in different ecosystem types.

The relationships of response ratio of N:P ratio (RRN:P) with that of N pool or P pool (RRNp or RRPp) in cropland, grassland, and forest ecosystems, respectively, under elevated CO2 in different ecosystem types.