In this work the classical bulk density measurement and the pycnometry method for measuring the density of cellulose,absolute density and porosity enable very accurate determination of true plant fi- ber porosity and cellulose content to be evaluated.

This paper had investigated fiber form and crystalline degree of Larix kaempferi in different tree age and different vertical location within a stem.

Effects of cover and no-tillage on soil cellulose-decomposing bacterium population and cellulose decomposition intensity;