Q499
The rhizosphere effect can be quantitatively represented by
A.
C : N ratio
B.
C : P ratio
C.
R : S ratio
AnswerD.
All of the above
Answer: Option C
Solution
Answer: Option C
Solution:
The rhizosphere effect can be quantitatively represented by the R : S ratio.The term rhizosphere to soil ratio indicates the number of microbes in rhizospheric soil divided by the number of microbes in soil free of plant roots. R:S ratio is greater for bacteria (20 : 1) and less for fungi and actinomycetes.