Treatment block PO4 trtcode No.fert 1 7.6 a No.fert 2 8.1 a No.fert 3 7.3 a No.fert 4 7.9 a No.fert 5 9.4 a 50lb.N 1 7.3 b 50lb.N 2 7.7 b 50lb.N 3 7.7 b 50lb.N 4 7.7 b 50lb.N 5 8.2 b 100lb.N 1 6.9 c 100lb.N 2 6.0 c 100lb.N 3 5.6 c 100lb.N 4 7.4 c 100lb.N 5 7 c 50lb.NP 1 10.8 d 50lb.NP 2 11.2 d 50lb.NP 3 9 d 50lb.NP 4 12.9 d 50lb.NP 5 11.6 d 100lbNP 1 9.6 e 100lbNP 2 9.3 e 100lbNP 3 12 e 100lbNP 4 10.6 e 100lbNP 5 10.4 e