As described above, in an era when wood prices in Japan were high and firewood and charcoal were the main sources of thermal energy, it was naturally considered that income could be gained by selling forest resources, such as charcoal, in addition to wood cut in the field practice forest of a university.
前述のように、国内の木材価格が高く、薪炭が熱エネルギーの中心だった時期においては、大学演習林において伐採した材木のほか木炭などの林産資源を売ることで収益を上げることは当然とされている。