In order for nitrate to form from soil organic matter, ________ must be present in the soil
A) Nitrobacter
B) Nitrosomonas
C) either A or B
D) both A and B
E) none of the above
Question 2Methemoglobinemia is principally a potential threat to ________.
A) adults drinking water high in nitrate
B) babies drinking water high in sulfate
C) adults drinking water high in sulfate
D) babies drinking water high in nitrate
E) all of the above
Question 3To be practical, a nitrification inhibitor should kill or inhibit ________.
A) Nitrosomonas B) Nitrobacter C) either A or B D) none of the above
Question 4The process of ________ releases soluble nitrogen as the result of the breakdown of nitrogen-rich organic compounds.
A) nitrification
B) volatilization
C) symbiosis
D) mineralization
E) denitrification
Question 5Ammonium fixation would be expected to be greatest in soils containing a lot of ________.
A) Rhizobium bacteria
B) iron oxides
C) vermiculite
D) Frankia
E) both C and D
Question 6The opposite process from mineralization is ________.
A) nitrification
B) ammonification
C) denitrification
D) immobilization
E) none of the above
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