Which chemical is used as extractant during sulfur estimation by Chesnin & Yein method?

Solution (By Examveda Team)

Calcium chloride (CaCl₂) is the chemical used as an extractant during Sulphur estimation by Chesnin & Yein method.
Chesnin & Yein has given knowledge of spatial variability of soil properties, the spatial distribution of specific organic matter, and nutrient management like available Sulphur or available potassium and many other essential plant elements.