In the first and second reports were discussed a reconnaissance method and a quadrate method of vegetation survey for the diagnostic study of succession of the slope vegetation on expressways. There were many types of communities under the various site factors. It is important to recognize the site factors that al e primarily responsible for the control of the species combination of the plant community.
This time the author plan to ellaborate on a belttransect method for the analysis of the relation between the slope vegetation rand the site factors, especially the location on cutting or embankment.
He made a case study on Meishin expressway, Tomei expressway, and Chuo expressway. Selection of stands for sampling of belttiansect was done for each typical vegetation. Width of belt is 2m and the belt is cut every 2m.
Date were recorded in each 2m×2m quadrate according to Braun-Blanquet method. The number of belttransect was 26. The analysis of the date was made as follows.
1. The location on the slopes were classified into 5 categories; upper part of cutting, lower part of cutting, top of embankment, upper part of embankment, lower part of embankment.
2. The life form spectra and the number of degree of succession was calculated in each part of slopes to compare the plant communities and the location on the slopes.
3. Height growth of Pinus densiflora was recorded to analysis the relation between the growth and the location on the slopes.
After these analysis, the results were as follows.
The succesion is more progressive on the cutting slopes, especially on the upper part of cutting slopes. The reason of this is thought that the upper part of cutting slopes neighbours the forest communities upon the cutting slopes. But the height growth of Pinus densiflora is better on the lower part of slopes, because the soil of the lower part of slopes is deep and more moderately moist.

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The purpose of this study is to clarify the structure of amenity (components of amenity and their integrated forms) of open spaces and its regional differences among urban open spaces, country open spaces and natural area's open spaces. For the persuit of this study it is impotant to analyze people's idea of the best condition of open spaces, so 42 items were selected as the components of open space and the degrees of people's desire for each of them were measured in 7 ranks (from quite unnecessary to very necessary). The questionnairing were held to 5 different groups of people. Results were the following.
1. The degrees of desire for the components of urban open spaces were high in every 5 groups, on the contrary the degrees of desire for the each components of natural area's open spaces varied more widely than those of urban open spaces.
2. Comparing the degrees of desire for a component between urban open spaces and natural area's open spaces, the components of [urban open spaces>natural area's open spaces] type were artificial and those of [urban open spaces<natural area's open spaces] type were natural, and those of [urbanopen spaces≠natural area's open spaces] type were indispensable or unnecessary for every open space.
3. Through the factor analysis by the Direct Varimax Method based on correlation coefficients between each desire for the components of open spaces, 11 factors were estimated, such as restfulness, artificiality, coolness, natural beauty, natural play, comfortness of nature, cleanliness, utility, management, quietness and naturalness. Among these factors, restfulness, artificiality and coolness were estimated in every groups and regions (urban, country and natural area).
4. Difining the “components of factor” as the components of open spaces which have greater factor loadings, eight factors without restfulness, artifi ciality and coolness sometimes belonged to the components of these three factors. Therefore eight factors except these three factors were peculiar to a group or to a region. Then restfulness, artificiality and coolness were considered as the fundamental factors or criterions in the case of the evaluation of open spaces.
5. The number of the components of artificiality were inclined to increase from urban open spaces to country and natural area's open spaces, i. e. in urban open spaces japanese garden, children play facilities and stands in open spaces were the main components of the artifiiciality and in country and natural area's open spaces even the components of utility and natural play belonged to the components of artificiality.
6. Defining the “need of factor” as the mean value of the degrees of desire for the components of a factor, the need of restfulness were the highest, then the needs of coolness and artificiality followed it. Comparing these needs of factors among urban country and natural area's open spaces, the need of artificiality was inclined to decrease in the order of urban, country and natural area.

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There are many physical units that relate to land which are useful in analysis, synthesis and planning required in planning studies. Generally, several scales of meshes and: or administrative districts are used as basic units. Also, watersheds have become an important unit in natural land use planning.
In this study, the relationship between the units and the regional characteristics are discussed. This is followed by a discussion of the relationship between land use and natural land conditions.
Finally, planning units based on watersheds are proposed for land use planning in the Sennan region of Osaka prefecture. These planning units are formed in two steps. Watersheds are used as the basic units, then these units are subdivided using ridges, rivers roads and/or railways as boundaries. These smaller units are used for gathering land use and land conditioh data. The process used in defining the units is descrived below:
(1) determine the basic river and its course indicated on the map (1/30, 000).
(2) define those watershed with ridges, etc.
(3) divide each watersheds into mountain, hill and flat zones.
(4) determine the subdivided units as in steps 1-3.
Land use data were gathered according to the basic and subdivided units and the subdivided units relating to the main ridges of the watershed were checked. These are shown in figure 13. However, land use planning maps based on the natural land potential should be proposed.

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