Abstract: A composite material has two common constituents including a reinforcement (e.g. such as fiberglass, carbon fiber and/or other suitable fiber or reinforcement) and a binder material integral with the reinforcement for providing a matrix; Additionally, at least one filler is integrated with the binder, which comprises a particulate material that is formed from at least one agricultural grain or other byproduct of energy production from agricultural material. The agricultural grain particulate filler may be a refined product (e.g. starch or flour), a byproduct from grain processing such as distillers grain (DDG), and or simple ground up grain products. The invention also contemplates use of bio-energy production byproducts (to include non-grain components such as processed foliage) for other constituent parts of the composite such as reinforcement.