Treatments Nitrogen addition (N) Phosphorus addition (P) N*P Water addition (W) N*W P*W Cluster fragmentation (C)
1 N1 P1 N1P1 W1 N1W1 P1W1 C1
2 N1 P1 N1P1 W2 N1W2 P1W2 C2
3 N1 P2 N1P2 W1 N1W1 P2W1 C2
4 N1 P2 N1P2 W2 N1W2 P2W2 C1
5 N2 P1 N2P1 W1 N2W1 P1W1 C2
6 N2 P1 N2P1 W2 N2W2 P1W2 C1
7 N2 P2 N2P2 W1 N2W1 P2W1 C1
8 N2 P2 N2P2 W2 N2W2 P2W2 C2