Abstract
Meshes, each having a side 5mm long, are drawn on the map (1:25000), and the inclination and the area of the cultivated land measured. In this way the relation betwen the inclination and the cultivation was obtained for the western slope of Mt. Hakone and Mt. Asitaka. The former is about 20km SSE of Huzi-san (Mt. Fuji), and the latter about 30km SE of the same mountain. Both are slightly dissected extinct volcanic cones. The slopes are thickly covered with loam. On the western slope of Mt. Hakone the principal cultivation is wheat in winter and batata in summer (Fig. I ). On the southern slope of Mt. Asitaka these two cereals are also cultivated. The settlements are at the foot of the mountains (Fig. 5).
We find in this vicinity no farms in terraces. The inclination of the ground and the rate of cultivation are measured on Hakone between the foot of the mountain and a height of 300m and on the slope of. Mt. Asitaka between the foot of the mountain and a line at a distance of 5km from the foot. The results are shown in Figs. 4 and 8. The abscissa and ordinate represent the inclination and rate of cultivation. The approximate curves are represented by probability curves (Formula 2. and 3.). From results we conclude that the rate of cultivation may change its value with the inclination, as both figures show.
Further, the relations between the rate of cultivation, the distance, and the height are also here obtained (on the slope of Asitaka), the results being shown in Figs. 9 and 10. The rate of cultivation decreases as the distance from the mountain-foot and the height increases.
