Nrate P block PO4 0 - 1 7.6 0 - 2 8.1 0 - 3 7.3 0 - 4 7.9 0 - 5 9.4 50 - 1 7.3 50 - 2 7.7 50 - 3 7.7 50 - 4 7.7 50 - 5 8.2 100 - 1 6.9 100 - 2 6.0 100 - 3 5.6 100 - 4 7.4 100 - 5 7.0 50 + 1 10.8 50 + 2 11.2 50 + 3 9.0 50 + 4 12.9 50 + 5 11.6 100 + 1 9.6 100 + 2 9.3 100 + 3 12.0 100 + 4 10.6 100 + 5 10.4