Soil chemical properties at the beginning (soil T0) and after one year at the end of experiment for the different fertilizer treatments (control, compost or vermicompost) with (EW+) or without (EW−) earthworms: C and N content (%), total P and K (%); available P and K (mg kg−1), CEC (cmol(+) kg−1). Standard errors are in parentheses, n = 5; values with the same letter within each column are not significantly different at P = 0.05.