chemical changes. Guava is probably not highly flammable in the first place because of 

 its high mineral content.^ The TGA residues, as compared to those of highly flammable 

 species, substantiate this. 



6. The herbicide probably increases the decomposition rate, leading to a higher 

 ash content on a dry-weight basis because of the mass change. The extractives may be 

 degraded by herbicidal treatment also. 



4 Philpot, Charles W. Mineral content and pyrolysis of selected plant materials. U.S.D. A. Forest 

 Serv. , Intermountain Forest and Range Experiment Station. (In preparation.) 



8 



