巻号一覧
9 巻 (1953 - 1954)
- 3-4 号 p. 81-
- 2 号 p. 41-
- 1 号 p. 4-
9 巻, 1 号
選択された号の論文の11件中1～11を表示しています
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(1) 春季における降雨と土壤流亡松岡 匡一, 川上 剛志1953 年 9 巻 1 号 p. 4-6
発行日: 1953/12/10
公開日: 2010/02/25
ジャーナル フリーNo concrete study on soil erosion concerning the grass land was ever made in Japan. I began, therefore, some experiments in 1952 with the object for clarifying the effect at grass land and rainfall have on soil erosion at the grass land of 13 chobu (1 chobu is about 2.45 acres), 25-40° gradient, east-faced steep hill-side and ecological analysis was made on the growth of grass of the natural grass land. Pleioblastus variegatus. was predominent, then Miscanthus sinensis. and Carex brunnea, grew thick and Lespedeza Cyrtobotrya. Themeda triandra. Cymbopogon goeringii. and Rhododendron dilatatum. Rhododendron reticulatum. too, were witnessed to grow in group throughout the land.
A concrete dam was made just where rain water ran away and water volume at the time of rainfall and the volume of soil erosion were measured there. The soil erosion at the grass land due to rainfall rapidly increased at the earlier stage of rainfall, decreased a little, and then increased. It was the same condition that the increase of water had on soil erosion. Soil erosion incereased after rainfall and decreased a little about 2 hours later when the rainfall was 7-19mm, its intensity 1-3.5mm per hour, and the water volume dropped most 6-8 hours after rainfall. The reason why soil erosion increased at the earlier stage of rainfall, decreased a little later, and then increased again, could be explained at that weathered and collapsed surface soil eroded first, letting the next surface soil to settle and then the next surface soil collapsed and began to erode.
The same phenomena could be obtained as to the running water volume from the grass land. This might be explained because the growth of plants on the grass land had very close relation with the gathering of decayed plants material.抄録全体を表示PDF形式でダウンロード (494K) -
千葉 豪1953 年 9 巻 1 号 p. 7-10
発行日: 1953/12/10
公開日: 2010/02/25
ジャーナル フリーIn this paper the author described mainly the specil quality of peat-bog and considerated the method of researches on the duty of water. Observations were carried out at the experimental rice-fields at Iwamizawa, Bibai and Kotoni in Hokkaido. Duty of water was counted every decade from percolation, evaporation and transpiration.
Evapotation and transpiration were estimated by formulae (1)-(5) from fall of water in some pots in the rice field; in half the number of the pots were soil, water and two rice-plants and in the other were only soil and water.
Apparent percolation was taken as the difference between fall of water in the rice-field and evaporation from the rice-field surface, and leakage of water through the raised foot-path between rice-fields was eliminated by measuring percolation with a cylinder without bottom. For instance, the more water in irrigation canal decreased the more the apparent percolation in the rice-field increased, on the contrary the more the water increased the more the percolation decreased, because the apparent percolation included leakage of water through the raised foot-path between rice-fields. When the percolation was maximum, that is, when the water in the irrigation canal was minimum, true percolation (in vertical direction) was 2/3 the volume of the apparent percolation. The maximum percolation decreased gradually as the ground became hard (Fig. 2). Percolation also was affected by the ground water level. In Fig. 3 as the culvert was closed at relief well, the lower parts of the rice-fields had higher level of ground water, and at (5) (Fig. 3) water leaks to the farm at a great rate and it seemed that the lowest part of the rice-field adjoinning a farm had a considerably lower ground water level.抄録全体を表示PDF形式でダウンロード (728K) -
掛流の開始・停止に伴う地温の推移佐藤 正一1953 年 9 巻 1 号 p. 11-12
発行日: 1953/12/10
公開日: 2010/02/25
ジャーナル フリーIn the plain district of Kyushu, the climate is almost subtropical in summer season.
For the paddy rice, low field-temperature depending on continuous irrigation with running-water is more favorable than high temperature based on stagnant water.
At the beginning of running-water irrigation, the soil-temperature instantly follows the water-temperature and becomes lower, while it continues lower for a week or so after the stopping of this irrigation, compared with that in the field with stagnant water.
Accordingly, the running-water irrigation should be ended some days before the artificial control of temperature becomes unnecessary.抄録全体を表示PDF形式でダウンロード (311K) -
淺川 富雄1953 年 9 巻 1 号 p. 13-16
発行日: 1953/12/10
公開日: 2010/02/25
ジャーナル フリー1. The climate of Nagano city belongs to that of inner Japanese type; therefore especially in winter, much cloudiness, moisture, snow, and warmth are observed.
2. The city has the character of city climate; concerning atmospheric temperature, humidity, frost, wind, fog, and the like, there is a very distinctive difference between in and out of the city.
3. What the author calls “the atmospheric currents of the Susobana” goes through the center of the city from west to east, causing a great influence upon the atmospheric temperature, humidiy, wind, frost, etc the city.抄録全体を表示PDF形式でダウンロード (735K) -
小林 茂樹1953 年 9 巻 1 号 p. 17-19
発行日: 1953/12/10
公開日: 2010/02/25
ジャーナル フリーThe area concerned which is adjacent to the city of Okaya is situated at the outlet of lake Suwa comprises the beginning part of the Valley of Tenryu and its eighboaring mountains. According to K. MISARA's article which was published more than 20 years ago and which reveals that the bending direction of a rice plant indicates the prevailing wind in autumn at the locality, the writer measured the bending direction of this crop this autumn and drew them in the map of 1:10000 which is shown in Fig. 2. It is indeed natural that at the Valley bottom prevail SW winds since Valley Tenryu runs in NE-SW direction, but it is eurious enough to find that there exist conspicuous western winds not only at both valley walls but also at the several alluvial fans in front of them.
In order to investigate the cause of prevalence of these western winds there, the writer furthermore observed the bending direction of the plant as far as in the surrounding region of Fig. 2, and drew them in Fig. 1, the rectangle in which corresponds to the area of Fig. 2. In this map he learned that SW winds exclusively prevail not only in the Suwa Basin, on both foothills of the Shioziri Pass but in the Ina Valley as well, and has ascertained that no wind blows into this area except the SW winds from the Ina Valley, which are the cause of the seasonal winds at the Valley bottom of Fig. 2.
According to the mechanical observations at the Kirigamine Weather Station situated at the summit of Vol. Kuruma-yama, the height of which is 1952m above sea level, however, the direction of the seasonal wind at the locality is S and SSW all through the year*. It is, therefore, not difficult to suppose the prevalence of southern winds in the air of the same height of Vol. Kurumayama also in the region of Fig. 1, even though SW winds prevail near the earth's surface by reason of the terrestrial modification, and it is also easy to infer the seasonal wind of the same direction over the area of Fig. 2, against which the upper part of the western ridge becomes a favourable screen. Since the wind velocity generally increases exceedingly in proportion to the height, it seems that the southern winds thus stroke against this precipitous valley wall blow downwards into the tributary valleys consequently eroding it to become the western winds in question, and these western winds further run upwards in the tributary valleys similarly growing in the opposite wall of Valley Tenryu, since this eastern valley wall is perfectly screened by the interfluve mountain ridge from the southern seasonal winds in the air.
* (the long arrow drawn at the summit of this volcano indicates the direction of the seasonal winds there.)抄録全体を表示PDF形式でダウンロード (554K) -
1953 年 9 巻 1 号 p. 19
発行日: 1953/12/10
公開日: 2010/02/25
ジャーナル フリーPDF形式でダウンロード (196K) -
病原菌の発育並びに生殖器官形成と病原性に及ぼす温度の影響藤川 隆1953 年 9 巻 1 号 p. 20-22
発行日: 1953/12/10
公開日: 2010/02/25
ジャーナル フリー(1) 本論文に於ては, 胡瓜疫病菌の発育並びに生殖器官形成と温度との関係に就て記述した。
(2) 菌叢の発育と温度との関係を22～38℃の各供試温度に就て見るに, 24.5～32℃で良く発育し, 其の適温は28～29.5℃の間にあるものと考えられる。而して, 38℃にては極めて僅かに発育するようである。
(3) 分生胞子の形成は本実験では形成少く判然としないが, 厚膜胞子は実験範囲で何れも形成し, 22～29.5℃の間でよく形成し, 卵胞子は22～29.5℃の間で形成され, 24.5～28℃で形成が良好である。
(4) 病原性と温度との関係は24.5℃最も早く, 28～29.5℃之に次ぎ32, 22℃の順となり, 35℃で急激に発病は低下し, 38℃では発病を認め得なかつた。
(5) 卵胞子の発芽を検せし処, 24.5℃と28℃とで発芽管を出し, 其の先端に分生胞子の形成するを認めた。
(6) 本菌の発育最高可能温度をしるため更に35～40℃で行つた処其の限界は38℃で, 39℃では発育し得なかつた。故に本菌は極めて高温菌という事が出来る。抄録全体を表示PDF形式でダウンロード (537K) -
A. 農業物理の面から見た水温上昇の諸問題三原 義秋1953 年 9 巻 1 号 p. 23-26
発行日: 1953/12/10
公開日: 2010/02/25
ジャーナル フリーPDF形式でダウンロード (754K) -
B. 稲作の面から見た水温上昇の問題田中 稔1953 年 9 巻 1 号 p. 27-30
発行日: 1953/12/10
公開日: 2010/02/25
ジャーナル フリーPDF形式でダウンロード (739K) -
C. 土地改良事業における水温上昇の諸問題深倉 好美1953 年 9 巻 1 号 p. 31-36
発行日: 1953/12/10
公開日: 2010/02/25
ジャーナル フリーPDF形式でダウンロード (1019K) -
D. 太田川水系の河川水温仁秋 伸彦1953 年 9 巻 1 号 p. 37-39
発行日: 1953/12/10
公開日: 2010/02/25
ジャーナル フリーPDF形式でダウンロード (462K)
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