1 The longer the duration of heat-treatment at high temperature is, the less the hygroscopicity of “Hinoki” (Chamaecyparis obtusa) or “Kuromatsu” (Pinus Thunbergii) Wood becomes, but when the latter wood is more resinous than the normal condition, its hygroscopicity becomes more on the contrary.
2 In the range of 60-115°C, the decrease of equilibrium-weight in wood is mainly due to the discharge of its moisture. It seems that the decomposition of the wood-substance will slowly take place in case over the temperature 115°C.
3 The components of wood lost by such a treatment are comparatively little in “Hinoki”- or “Kuromatsu”- wood in the normal condition (2.5% and 3.7% respectively at the 130°C 96 hours-treatment); but in the resinous wood of “Kuromatsu”, it is not the case (9.8% at the same treatment).
4 As to the result of six hours extracton by Alcohol-Bensol from the test-piece (20mm×20mm×35mm) of “Hinoki” or “Kuromatsu”-wood, the longer the duration of heat-treatment of it at high temperature is, the lower the percentage of extracted materials is obtained, but the resinous wood of “Kuromatsu” the relation is reverse.
5 The shrinkage of “Hinoki” -wood which occurs by the heat-treatment is little in tangential or radial-direction and in volume. For instance, the volume-shrinkage is only 1.2% at the 130°C 96 hours-treatment.

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In this report, the morphological, physical, and chemical features of each horizon in three soil profiles of residual soils of tertiary lower tuffite beds (profile No. 1 and No. 3) and tertiary tuffaceous shale (profile No. 2) on the HIBA natural forest region at Kanagi district, Tsugaru Peninsula, were studied and the forest soil types were discussed. The region is situated about 200m. above the sealevel and the mean annual temperature is about and the rainfall is rather heavy, averaging about 1300mm. annually.
The morphological features of the soil profiles were observed as follows; Profile No. 1
A₀: 6-7cm. deep. Raw-humus, accumlative layer which consists of leaf mold of HIBA.
A₁: 6-7cm. deep. Humus-rich horizon, dark tint, slightly fine granular.
A₂: 10-13cm. deep. Dark gray. sandy. structureless.
B₁: 11-12cm. deep. Reddish brown, compact, hard, blocky structure, fissure, and forming hard pan of iron.
B₂: 20-25cm. deep. Yellowish light brown, compact, sandy. Profile No. 2
A₀: 12-13cm. deep. Raw-humus, accumulative layer which consists of leaf mold of HIBA.
A₁: 4-5cm. deep. Humus-rich horizon, black tint, clayey, structureless.
A_2-1: 4-5cm. deep. Dark gray, clayey, compact, stickness, structureless.
A_2-2: 1-5cm. deep. Sub-horizon of A_2-1. whitish gray, clayey, heavier texture.
B₁: 20-30cm. deep. Dark reddish brown, clayey, compact, heavy stickness. It is slightly vein-like deposit of Fe₂O₃.
B₂: over 50cm. deep. Yellowish light brown, clayey, compact, heavy stickness. Profile No. 3
A₀: 5cm. deep. Raw-humus, accumulative layer which consists of leaf mold of HIBA.
A₁: 5cm. deep. Light dark tint, clayey and partly nutty.
A₂: 5-10cm. deep. Dark gray, clayey and slightly nutty.
B: 15-20cm. deep. Bright reddish brown, clayey, compactness.
G: over 35cm. deep. Greenish gray, fine sandy, glei horizon with rusty mottles According to the experimental data, humus was plentifully accumulated in surface layer, pH values of the surface layer were low. The exchange acidity (y₁) of A₁ tends to be higher, but that of A₂ of profile No. 2 and B₁ of each profile washigher.
The result of mechanical analysis indicated that B₁ was rich in clay than A₂ in the soil profiles.
As the result of the determination of mineral ingredients dissolved in hot hydrochloric acid in each profile, it was found that the eluvial horizon (A₁ and A₂) was impoverished of the R₂O₃ constituents with an enrichment of them in the illuvial horizon (B₁ and B₂) _??_specially, the accumulation of Fe₂O₃ in the B₁ of profile No. 1 was strongly marked.
The molecular ratio of SiO₂: Al₂O₃ in each profile was larger _??_in the eluvial horizon as compared with the illuvial horizon and the same tendency was also recognized in the ratio of Fe₂O₃: Al₂Ob₃. According to the result ofthe molecular ratio, it was found that SiO₂ was accumulated in A and R₂O₃ in B.
From the result above mentioned, it is clear that three forest soils should be classified in the podzol soil type. Besides, profile No. 1 and No. 2 are classified in “Iron Podzol”, the former is sandy type, the latter is clayey type, and profile No. 3 is classfied in “Glei Podzol”.

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In investigating this theme the following schema was taken for developing consideration.
_??_
Characteristics of forest policy in U. S. S. R., which were derived in such a way, are as follows.
1) Devotes forestry to the collectivist economy.
2) Forest land and stock belong to public funds.
3) Character of forest law is distinctive.
4) Care for peasant forest is great.
5) Category “Forest of special mission”
6) Administrative organization of forestry is not simple.

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The writer have been studied the effect of coverture by forest litter and brush on the improvement of growth in the Hinoki (Chamaecyparis obtusa) plantation which was growing only about 1 meter when 15 years old, and following results obtained.
1) Hinoki trees which was covered the ground by forest litter and brush are showing more than 6 times in growth of volume comparison with non treated area. But these effect continued no more than 3 or 4 years after the coverture settled.
2) The chemical character of soil are improved by the proceeding method. For example, the compornent of all nitrogen and organic matter increased well.
3) This method is effective when we expect more rapid growth in limited years. But if we expect the successive improvement of forest, we must take some mixed plantation with broad-leaved-trees at the same time as the soil improvement by the litter and bruth.

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1 Tree-blades as fodder-resources. There is 2 Millions ha. of the forest atet area in Japan, in which we can the tree-blades as fodder for cattles.
The annual products of these forest are 5 Millions ton in dry measure. If we can annually utilize, 10% of all the products, we cat annually 500 thousand of all tree blades in dry measure.
2 The result of experiments on the appetite for horses.
It is genrally showed, that a small quantity, of some tree-blades, allways rais es higher appetite, while lots of certain blades decreaseit.
It is sometimes possible to feed certain tree-blabes, mixed with another kinds of blades which are not eaten, when those blades are simply giveen.
This fact shows that mixed-feeding is better than pure one.
3 The results of physkilogical experiment,
The blabes of 5 specis: Betula Ermanii, Corylus heterophilla, Quercus mongolica, Acer mono and Lespedeza bicolor were given in each proportion, for 6 experimental horses, 12.7-20.0kg. a day.
The horses were examined 2 times; before feeding and after.
Then they differ in no respects from each other.
4 The inference of suitable tree species.
The 34 species, which are able to be utilized for cattle fodder was found out in the 110 species distributed in Eastern Manchuria.
By the point of classfication; Salicaceae, Betulaceae, Fagaceae, Leguminosae are most usefull families.
5 Conclusion.
Whole Japan forests are able to product the fodder-utilizable tree-blades, annually 5 Millions ton; it one can find out some suitable method, those blades will be usefully practical resources. And then it will be able to make up some part of thick fodder, which is supplied about 3, 500 thousand ton every year.

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