Mt. Ontake and extremely large values for both weight (2.9 mg/g) and count
(4.7 grain/g) were observed at point 1. As point 1 was occupied with B. ermanii,
planted as a part of development of a lodging area in Nigorigo-Onsen village,
sclerotia at this location might be formed under anthropogenic conditions.
Figure 9.14 illustrates the relationship between pH (KCl) and T-C under different
WI values. Besides several exceptions, there was a notable tendency that pH (KCl)
descended and T-C ascended when WI shifted from 64 to 46 at Mt. Iwaki (WI > 45
area, Fig. 9.14a). On the contrary, pH increased and T-C decreased when WI shifted
from 44 to 30 (Fig. 9.14b). As the same, pH decreased and T-C increased when WI
changed from 42 to 35 (Fig. 9.14c), and the opposite trend was observed for points
with WI from 33 to 15 (Fig. 9.14d) at Mt. Ontake. The weight density of sclerotia
was high in areas of pH (KCl) < 3.5 and T-C > 200, which is represented by a dotted
circle in Fig. 9.14.
Fig. 9.8 Contents of (a) free aluminum by their status, and (b) free iron oxides in each profile
9 Spatial Distribution of Sclerotia Grains in Forest Soils, Northern and Central. . .
165
(4.7 grain/g) were observed at point 1. As point 1 was occupied with B. ermanii,
planted as a part of development of a lodging area in Nigorigo-Onsen village,
sclerotia at this location might be formed under anthropogenic conditions.
Figure 9.14 illustrates the relationship between pH (KCl) and T-C under different
WI values. Besides several exceptions, there was a notable tendency that pH (KCl)
descended and T-C ascended when WI shifted from 64 to 46 at Mt. Iwaki (WI > 45
area, Fig. 9.14a). On the contrary, pH increased and T-C decreased when WI shifted
from 44 to 30 (Fig. 9.14b). As the same, pH decreased and T-C increased when WI
changed from 42 to 35 (Fig. 9.14c), and the opposite trend was observed for points
with WI from 33 to 15 (Fig. 9.14d) at Mt. Ontake. The weight density of sclerotia
was high in areas of pH (KCl) < 3.5 and T-C > 200, which is represented by a dotted
circle in Fig. 9.14.
Fig. 9.8 Contents of (a) free aluminum by their status, and (b) free iron oxides in each profile
9 Spatial Distribution of Sclerotia Grains in Forest Soils, Northern and Central. . .
165