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Table IV

P status of the two growing media (standard deviation).

Mineral soil Forest floor
Total P (mg P g−1) 0.084 (0.005) 0.412 (0.008)
Organic P (mg P g−1) 0.048 (0.001) 0.395 (0.009)
Microbial P (mg P g−1) 0.007 (0.003) 0.112 (0.004)
Inorganic P in solution (mg P g−1) 1.2E-5 (3.6E-6) 2.2E-3 (1.6E-4)
Gross amount of P ions exchanged 0.0012 . t 0.33
in t minutes (mg P g−1)