Biomass sub-samples were oven dried at 105±2°C until constant weight. Dry biomass was computed based on the moisture contents of the various sections, weighted by the relative weight contribution of each section to the total culm biomass. The moisture content of culms was determined on the wet basis. Allometric functions of culm biomass based on DBH were developed for both species by evaluating power, logarithmic, polynomial and exponential functions for best fit. Culm biomass per hectare was computed based on data collected in February 2013 for both sites and additionally in December 2013 for Nakhon Ratchasima. The Proximate Analysis of six pooled biomass samples per species was carried out in the laboratory after air drying samples to constancy at approximately 10% moisture content. Higher Heating Values were determined using a bomb calorimeter according to ASTM D 7582-10 and ASTM D 5865-11a and refer to values at dry basis.