Under the growing interests in forest resources and the demands for the consolidation of manifold forests, applicability of the GIS techniques for the multipurpose resource management was discussed from the viewpoint of the database construction on resource environmental information, which was based on the watershed management. A system integrated the watershed resource information based on the public administrative data and the forest register concerned with forest resource information was considered. The usage of national census data was discussed on the case of Shimanto Forest Planning District. The information system integrated the watershed resource information and the forest register was proposed at Umaji.

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As a method of reforestation which aims at decreasing the cost of reforestation, ensuring the income of cash and saving labours, the slash-burning have been carrying out since 1984 in cut over Pinus-Quercus forests in Nita-Cho, Shimane Prefecture. To sustain productivity in forests, nutrient dynamics should be studied,and it is very necessary to clarify the effects of slash and burn of field on forest soils compared with the general reforestation. The purpose of this paper is to clarify the changes of soil temperature during the burning, and the ashing extent of organic matter accumulated on the forest floor after burning.

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This paper deals with the feasibility of assessment of tree vital activity by the colormeter for urban park trees. The estimation algorythm of tree vital activity is based on the spectral characteristic of tree leaves against solar radiance. Measurement with colormeter is enable to estimate without affecting by light source because this colormetric system is used in condition with same insert light angle by the specified archromatic lights. Vital activity assessment by the tristimulus value of tree leaves is usefull for periodical mesurement in a small area.

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