Figure 4

Relationship between CO2 emission rates and soil moisture at the (a) Lusaka and (b) Kabwe sites. Pearson’s correlation coefficients between the log-transformed CO2 emission rates and soil moisture are shown in the top left corner of each panel. CF: chemical fertilizer amendment, CM: cattle manure amendment, PM: poultry manure amendment, MR: maize residue amendment, and NF: no fertilizer amendment.