Walkley & Black method is associated with

A. N

B. Org.C

C. P

D. K

Answer: Option B

Solution(By Examveda Team)

Walkley & Black method is associated with soil organic Carbon. It helps in determining carbon.
This method quantifies the amount of oxidizable organic matter in which OM is oxidized with a known amount of chromate in the presence of Sulphuric acid. The remaining chromate is determined spectrophotometrically at 600 nm wavelength.