Figure 3

Within-plot CVs of AG, BG, BX, CBH and Cacq under three N fertilization treatments (NN, LN and HN) in two bioenergy croplands (SG and GG). The dashed lines represent a CV of 20% and 40%. Different lowercase letters denote significant difference in CV between fertilization treatments and different uppercase letters between crop species for each enzyme at P < 0.05. The abbreviations are referred to Tables 1 and 2.