All issues
Successor
Volume 31 (1967 - 196･･･
- Issue 4 Pages 2-
- Issue 3 Pages 2-
- Issue 2 Pages 2-
- Issue 1 Pages 2-
Volume 31, Issue 2
Displaying 1-5 of 5 articles from this issue
- |<
- <
- 1
- >
- >|
-
Takeshi NAKAMURA, Naritada TAKAHASHI1967 Volume 31 Issue 2 Pages 2-4
Published: December 25, 1967
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSIn recently according to increase of demand for sightseeing, the number of visitors to the natural parks are increasing year after year.
In natural park the forest is a important factor in landscape.
At the Chubu-sangaku national park we investigated the forest constitution and what kind of forest are better from the view-point of landscape.
In this area, forestation and cut down a forest are not take and the forest put in natural state, so stand growing to over-thick and beauty effect of forest is not bring out.
Crown density of forest in this area is more than 50% in general and some time over 100%.
Result of this investigation the worthy forest from the view-point of landscape is as follows.
(1) The crown density of 28-47% is better as a forest constitution in national parks.
(2) In light demanding tree like the white birch and the black alder the crown density is better under 30% in young stand, and 40-50% in old growth stand.
(3) In case of the old age of katsura-trees and the elm-tree, although the crown density are 60% or more than that, the forest show light and magnificent apearance as a result of highness of trees.View full abstractDownload PDF (374K) -
Akira HOMMA, Hiroshi UCHINO1967 Volume 31 Issue 2 Pages 5-8
Published: December 25, 1967
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSSoils of the reclaimed land of the foreshore in the KEIYO RIGION (near CHIBA CITY) consist of sand and silt. The nain disadvantage with this silt is that this soils are not porous and contain salt of high degree.
The results oblained are
1. The order of the dry weight is as follows (1) Silt mixed with sand (1: 1); (2) Loam only; (3) Loam piled up; (4) Sand column; (5) Silt mixed with E B-30 (soil conditioner); (6) Silt mixed with Telnite (Soil conditioner); (7) Silt only.
Healthy growth of grasses is noticible from (1) to (3), while it is not worthmentioning from (4) to (7).
2. In the case of silt, percentage of Chlorine in the upper parts is always higher than the lower parts. In the case of Silt mixed with sand, Telnite and E B-30, percentage of Chlorine is considerably lower than that of silt only.
3. Though the percentage of Chlorine in silt is so high to grow any vegitable, but several roots were found in the bottom of silt (25cm in thickness).
4. From the present experiment it may be concluded that “Silt mixed with sand” and “Loam piled up” will be the most suitable methods for Zoisia matrella (HIMEKORAISHIBA) plantation.View full abstractDownload PDF (454K) -
The planning of Historic Park “Kudaradera old Temple” andlnterview survey on surrounding inhabitants' feelingsKimio KONDO1967 Volume 31 Issue 2 Pages 9-15
Published: December 25, 1967
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSThis study intends to survey inhabitants' feelings and habitations on Historic Park “Kudaradera old Park” to check designers' intention.
The survey had 870 answers and its main results are as follows;
i) The valuetion of historic park construction consists 6 to 9 agreement-replies against 1 objectionreply in its rate, and their reasons' numbers are 26 in agreement and 3 in objection, per 100 answers.
ii) Most of these reasons appoint only their surrounding conditions' alternation, but not historic parks' meanning; and most of visiting purposes are occupied with their relaxation.
iii) On future ways of historic spots' use, it is consisted of 6 to 8 in historic park constrction and 2 to 4 in playlot construction.
iv) Above results is a judge at the midway of first historic park's construction.
In future, i. e, after the perfection of this historic park, it is expected the increase of understanding of historic spots' value; because, at present, citizens with knowledge of present historic park or with high education, appreciate historic spots' value more than other citizens.
Thus, a survey after the perfection of this historic park, will make clear the educational influences of designing intention of this park.View full abstractDownload PDF (4908K) -
On the salt tolerance of ryegrasses and fescuesFumio KITAMURA1967 Volume 31 Issue 2 Pages 16-21
Published: December 25, 1967
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSThe experiments were carried out in 1966 to know the salt tolerance of lawn grasses. Perennial ryegrass, Italian ryegrass, and Creeping red fescue were grown in sand cultures at various concentrations of NaCl. Hoagland's solution was used as the basic solution (control), and the concentrations of CI to it were 1000, 5000, 10000, and 15000ppm, respectively. The results obtained are summarized as follows.
1. The growth of ryegrasses and fescues were almost normal at Cl 1000ppm similar to control. In the 5000Ppm application, it became worse and most plants died. In concentration of Cl above 10000ppm, the grasses are inpossible to live.
2. With increasing concentration of Cl, plants were dwarfed and the number of sterns, leaves and roots reduced.
3. As results of this experiments, perennial ryegrass, Italian ryegrass, and Creeping red fescue were comparatively strong to salt solution. Among the grasses, according to salt tolerance, they were arranged as follows:
Perennial ryegrass>Italian ryegrass>Creeping red fescue.View full abstractDownload PDF (3907K) -
Sumiji KOBASHI, Kozo KANNABE, Koichi GOTO1967 Volume 31 Issue 2 Pages 22-26
Published: December 25, 1967
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSAuthors measured forest and non-forest temperatures and these earth temperatures in Fukuchiyama for two years. The measurements were carried out in two testing slopes in forest of Pinus densiflora and Chamaecyparis obtusa and in non-forest. Air temperatures of 1.5m high above the ground surface and earth temperatures of 2cm, 5cm, 10cm, and 20cm deep under ground surface were measured.
These results were follows:
Air temperature
1. Concerning with the maximum and minimun values of air temperature for a day, the mean and maximum values for a month had the same tendancy: In summer the maximum values were nearly same and the minimum value in forest was higher than in non-forest. In winter, both of the maxium and minimum values in forest were higher than in non-forest.
2. The difference was 2.3°C in summer, 5. 6°Cin winter and attained to 6.7°C in maximum value.
3. The di f f ererence between the maximum and minimum values was 10°C in non-forest and 8°C in forest on an average, there were little change through a year.
Earth temperature
1. In winter, there were little difference between forest and non-forest about mean values for a month, and also little difference in depth. In summer, the ground sur face temperature in non-forest was 3-5°C higher than in forest. This difference decreased with the depth, being zero at the depth of 10cm.
2. The smaller the distance from the ground surface was, the larger the standard deviation became. This inclination was more remarkable in nonforest than in forest. And also the standard deviation was larger in summer than in winter.
3. The limit of depth where the standard deviation was large was 10 cm in non-forest and 5 cm in forest.View full abstractDownload PDF (1830K)
- |<
- <
- 1
- >
- >|