Multiple Choice
Disease suppressive soil often results from _____.
A) Fumigation with a volatile chemical.
B) Heating the soil by natural solarization or steam heat.
C) Repeated tillage to keep the soil bare for at least one full year.
D) Adding organic materials to the soil that stimulate diverse microorganisms.
E) All of the above.
Correct Answer:
Verified
Correct Answer:
Verified
Q31: This (these)group(s)of microorganisms usually predominate(s)in sandy,acid soils.<br>A)actinomycetes<br>B)bacteria<br>C)fungi<br>D)both
Q32: In which situation are the actinomycetes likely
Q33: Organisms which use carbon dioxide or carbonates
Q34: In nature,beneficial mycorrhizae form with the roots
Q35: An organism that subsists by eating predators
Q36: Mycorrhizae do not normally kill their host
Q37: Where conditions are favorable,earthworms are known to
Q38: Of all the groups of soil organisms,bacteria
Q40: Mycorrhizae involve a symbiotic combination of certain
Q41: Compared to the bulk soil in which