Multiple Choice
Because of _______,soils developed in marine marshes can become extremely acid if drained for agriculture or used as topsoil.
A) oxidation of sulfates
B) reduction of sulfates
C) oxidation of sulfides
D) reduction of elemental sulfur
E) all of the above
Correct Answer:

Verified
Correct Answer:
Verified
Q8: Plants obtain nitrogen from the soil by
Q9: Although slow release fertilizers take longer to
Q10: On the average,agricultural soils in the US
Q11: Soluble organic N compounds are taken up
Q12: By converting nitrite to ammonium,the anaerobic process
Q14: Ammonium fixation would be expected to be
Q15: Grass clippings from a healthy lawn can
Q16: Highly weathered soils low in available sulfur
Q17: Ammonium fixation occurs to the greatest extent
Q18: The terms "ammonium fixation" and "biological nitrogen