地代

1. Professor Sonobe had ever difined, "Rent on the forestry is the portion of the earnings of the forest management which is imputed to the land" However, it is evident that the difinition of the rent is the same as "natural rent" by F. von Wieser and not the ones admitted by the economists since D. Ricardo. Depending on the latter, the definition of the rent on the forestry is as follows; "Rent is the portion of the price which would be paid to the service of the land, if the differentiation between the entrepreneur and the landlord in the forest management has been taken in practice." 2 . In the forest valuation science, the rent is not deduced as the cost from the net earnings (Bu) of the forest management. Explaining this part by the formula, the "rate earned" in the forest management is showed in Bu/B P and Bu is equivalent to [omitted]. It is, therefore, no doubt that the rent should be further deduced as the cost from the net earnings (Bu) of the forest management. But Professor Yosida has examined on the relation between the rent and the net earings (Bu) and stated as follows, "the rent and the profit are contained in Bu. If we wish to determine the rent, the profit must be given. But the profit cannot be also determined, if the rent is unknown. Thus the rent cannot be determined". I think, however, he has misled the concept of rent. For he has never remarked that the rent was the price to be given to the forest management, depending on the social conditions. 3. The rent is the given price to the forest management. It means that the rent is not determined by the earnings from the forest management, but by the social conditions. But the rent is not fixed because the conditions are variable. Therefore, the entreprenur must accept the rent as the given price, while the rent is variable through the periods of the management. Thus arises the necessity for the entreprenur to adapt the forest management to the time lag. It is, however, difficult to forecast the variation of the rent through 40～50 years or more in future. To such circumstances, the forest management will have a tendency to be self-management.