Fig. 2
From: Microbial activities in soil cultivated with corn and amended with sewage sludge
Scoring plot of treatments (a) and loading plot of variables (b) ordinated in PCA. The variance percentage explained by each component is given in parenthesis. Abbreviations of variables are explained in Materials and methods. MF, mineral fertilization; 1FS, dose 1 of sewage sludge; 2FS, dose 2 of sewage sludge; 4Fs, dose 4 of sewage sludge and 8FS, dose 8 of sewage sludge