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Table 6 Summary results from multiple regression between annual gas fluxes (CO2 and CH4) and soil properties: pH soil pH, BD bulk density, C:N soil C:N ratio, pH*C:N interaction term soil pH and soil C:N ratio; NH + 4  soil ammonium concentration, log10(WFPS) water filled pore space

From: Soil carbon dioxide and methane fluxes from forests and other land use types in an African tropical montane region

Gas flux Variables Coefficients F value p-value % of total variance
Log CO2 Intercept 1.49   < 0.001  
  pH 0.060 18.3 0.002 30.3
  BD − 0.79 18.3 0.002 30.3
  C:N − 0.005 0.58 0.463 1.0
  pH*C:N 0.04 13.3 0.005 21.9
CH4 Intercept − 37.9   0.001  
  NH4+ 0.27 16.4 0.002 28.1
  Log10 (WFPS) 13.7 23.1 < 0.001 39.5
  C:N 0.48 1.4 0.256 2.4
  BD 7.7 5.5 0.036 9.5