The Partial Pressure of Oxygen in the Atmosphere Is 0

Multiple Choice

The partial pressure of oxygen in the atmosphere is 0.21 bar and that of nitrogen 0.78.Which of the following partial pressure levels would you expect to find in the pores of a moderately well-drained soil?

A) 0.21 (oxygen)
B) 0.80 (nitrogen)
C) 0.30 (oxygen)
D) 0.50 (nitrogen)
E) 0.15 (oxygen)