Dera Satyajit Pattanayak:

according to my opinion it is much better to determine moisture content in biomass by classical dry mater determination, using gravimetric methods.

Best regards Vit 

There are two common ways in which the moisture content percentage (MC%) of wood is routinely expressed. 

GREEN BASIS: In the green or wet basis (usually abbreviated

“Green basis”) method, the percent moisture in the wood is expressed as a percentage of the TOTAL weight of the wood, including both the dry wood material and the water. This method is most commonly used for pulp chips and hogged fuel and this method is generally the method used to determine the MC of woody biomass. 

MC% (Green basis) = (weight of water / weight of water + dry weight of wood)*100

OVENDRY BASIS: In the ovendry basis (usually abbreviated “OD basis”) method, the % moisture in the wood is expressed as a percentage of the dry weight of wood. This method is the standard method used in this country to express moisture content for solid

wood products of all kinds including lumber, veneer, plywood, OSB, particleboard and other panel products.

MC% (OD) = (weight of water / dry weight of wood)*100

Please have a look at this useful ResearchGate link and PDF attachment.

https://www.researchgate.net/publication/229227772_Comparison_of_different_methods_for_the_determination_of_moisture_content_in_biomass

Article Comparison of different methods for the determination of moi...