The most interesting facilities for the blind are swings fountains and benches which give them comfortable sounds. The desirable path for them ih park is concrete or lown in material, plain and straight in form, 1.5-3m in width, by only one side, 50cm wide. One step is 15-20cm high, the switable bench is 40-60cm high. The handrail for leading is not good for 60% of them.
Utilization ratio on park is high but more than half of them did not feel interesting after play. Problems which are expected to be solved by planners are invention of more delightful and sefty facilities for play, method of indication of place, and disposition of facilities.

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People living in urban environment, are very thirsty for contacting with nature. So, even trees and small woods located in parks, pricincts of shrine and temple, private gardens and other open spaces in urban areas, have a powerful effect on the improvement of the feeling of sufficiency to natural greens in urban life.
Our study intends to investigate the quantitative inter-relationship between natural greens, mainly consisting of trees and small woods, and psychological or emotional reaction of people to them, which is expressed as feeling of green-sufficiency. Their results will be able to serve as concrete criteria for environmental assessment or urban landscape planning.
As the first cace study, we made a questionary survey in four school districts in Kishiwada City, Osaka Prefecture, and asked the dewellers, who are the parents of the school children in the districts, whether they felt the green rich or not in zone of daily life in order to perceive their feeling of greensufficiency.
On the other hand, we calculated the green coverage (per-centage) of four supposed zones of daily life with the radius of 150, 250, 350 and 550 meters respectively by using aerial photographs taken in 1971.
The results from this study are as follows.
(1) When the ogives of the component ratio of repliers by difference of the feeling are described by every zone, both curves of 150 and 250 meters zones ore alike each other, but different from those of 350 and 550 meters zones. From this fact, we may assume that the greens which are distributed in the zone of the radius of about 250 meters govern the feeling of green-sufficiency in a daily life.
(2) The minimum standard of the green coverage which is necessary to hold the sense of psychological sufficiency to the natural green is supposed to be about 15%.
(3) The locational types of the trees or groves with which dwellers are familiar in the neighborhood, are various, but they have a common character as landmarks in the surroundings. We can observe that the average distance from the dwelling place of earch replier to these greens is within 300 to 500 meters radius, and extends with public accessibility to them.

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[in Japanese]

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This study intends to research the effect of the state of soil on the growth of street trees in the city. The most of street trees, generally, lost vigour. Growth effections is rather less by air pollution, but more by physical and chemical condition of soil and subsoil, showing vital forces of such trees. Principal reasons to show poor growth are considered following data:
1. Gravel and gravel horizon are frequent in soil.
2. There is hardpan in the subsoil.
3. Soil is hard and compact.
4. Soil water permeability is not favourable.
5. There is decline in soil water-holding ability.
6. Soil acidity is excessive alkalization.
7. There is lacking in major elements of fertilizer, especially nitrogen and phosphoric acid in soil.
8. There are contained too much injurious materials against growing in soil.

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[in Japanese]

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