地理学評論
Online ISSN : 2185-1719
Print ISSN : 0016-7444
ISSN-L : 0016-7444
25 巻, 5 号
選択された号の論文の4件中1~4を表示しています
  • 千葉 徳爾
    1952 年 25 巻 5 号 p. 169-181
    発行日: 1952/05/01
    公開日: 2008/12/24
    ジャーナル フリー
    1. Vegetation is a phenomenon which reflects many conditions of environment as functional space.
    We can regard crops as the artificial vegetation which reflects human conditions as well as natural conditionons. In other words, we can recognize the environment of agricultural communities by the crops.
    2. The qualitative close relation between regional conditions and varieties of aquatic-rice was proved by D. Matsuo in Omi-district. Then the auther attempted somewhat quantitative analysis in Miyagi and Aichi prefectures by the variety of aquatic-rice.
    The measuring unit is sub-prefecture (Gun).
    In Aichi-prefecture we divided it into 5 regions having the different percentages of the varieties. Fig. 1 and Table 2 show the properties and the transition of regional environment respectively.
    In Miyagi-prefecture the regional percentage of the varieties having the same quality are tested by Smirnov's relent-test method, every year as samples of environmental requisition from regional “population.” The requisitions are classified as follow: 1) Resistance to coolness 2) Resistance to rice-blast, other diseases and harmful-worms etc. 3) Requirement for better harvest 4) Requirement for better quality, for food. Since Gun is an administrative unit, we have to divert it into the boundary under the actual landutilization. The auther has done this by free-hand drawing and got Fig. 2, according to calculation in Table 3.
    4. On making the e attempts the anther had made up Fig. 4, to glimps the distribution of natural and economic environments for growing rice, though many restrictions exist. These data are given in by Agricultural Experiment Station of Japan.
    In detail this map is only forcast.
    a) Resistance to coolness is required in Hokkaido and the north-eastern part of Tohoku district. In these regions staple food are not rice.
    b) Resistance to Rice-blast etc. are mainly required in mountainland because in these districts the techniques of rice production are poorer. It is very often that we find old customs existing in these regions.
    c) Economic conditions as require good harvest and good quality for food appear in the regions which is free from natural control.
    The western coast of Tohoku district shows clear contrast to its eastern part. From the Nobi Plain to the coast of wester part of Setouchi, as climate and soil are in the best condition for aquatic-rice, and economic conditions are also very good, so the better quality for food is required and a large number of varieties are found in these areas.
    d) resistance to drought and brine is found in the western part of Japan, except for the Kujukuri Coastal-Plain. These regions are also poor in irrigation-technics. On the contraly resistance to dampness and flood is required along the rivers in the eastern part of Japan.
    e) The techniques of rice-culture in the southern islands of Kyushu are different from those in main lands. Like Loochoo they seed and gather in rice as early as they can to avoid the damages from Typhoon and harmfulworms. Used is Rikuu No. 132, are presentative variety in Tohoku district.
  • 谷津 榮壽, 中山 正民, 井口 正男, 高野 繁
    1952 年 25 巻 5 号 p. 182-192
    発行日: 1952/05/01
    公開日: 2008/12/24
    ジャーナル フリー
    The River Watarase flows out from the western part of the Nikko Volcanoes, and runs southward through Ashio mountainland and empties into the River Tone in Kwanto Plain. Recently this river flooded frequently and the river floor of its lower course has been elevated. by deposits.
    The writers studied on the transporting materials of this river, specifically referenced to the upper course in Ashio mountainland from the geomorphological and potamological point, of view as a fundamental survey for civil engineering. In this paper, the transporting materials of Watarase River are stated briefly.
    1. Suspended materials are supplied in large quantities from the settlingponds of Ashio Cupper Mine and its Refinery situated on the upper stream of this river. These materials are transported and deposited in the lower course and in the flood control lake, Akamanuma.
    2. Solution is leached out in a great deal from Akagi volcano region because this volcano erupted in quaternary and its rocks are fish. Consequently the amount of solution of the tributaries from this region is far more than that of the tributaries from palaeozoic slate and granite regions in this mountainland.
    In Akagi region, as the volcanic ash and detritus are less cohesive and many landslips happen, so the.boulders and gravels of andesite are heaped on this river bed near Omama Town at the entrance to this mountainland. Therefore the fluvial gravel deposits of quartz porphyry and liparite from the headwater of the River Watarase are less than those of the anndesite. The elevation of river floor is mainly due to the detritus from Akagi Volcano.
    3. The palaeozoic slate is apt to become small gavels, but granite is apt to become large boulders and not to become gravels. Granite. boulders are disintegrated abruptly into small pieces when they are transported in the river.
    4. About 10meters gravel bed in thickness is seemed to be deposited in the flood plain without any depression in the river which has the same physiographical features as the River Watarase.
    On such thickness of river gravel bed, we consider it to be renewed by several floods, and accordingly the river terraces which have such gravel beds are not to be called alluvial terraces in such rivers.
    5. The bed loads of this river are on the increase lately and about 500, 000 q. m. of sands and gravels are transported during a year.
  • 奥秩父山地の一例
    福宿 光一
    1952 年 25 巻 5 号 p. 193-205
    発行日: 1952/05/01
    公開日: 2008/12/24
    ジャーナル フリー
    In the Oku-Chichibu mountainland, each tributary of the upper stream of the Arakawa runs nearly from west to east and there are great differences between adret slopes facing south and ubac slopes facing north. The writer, in order to grasp the character of the mountain village from a standpoint of the arable land utilization, observed the differences of their land utilizations and natural environments and examined some problems in reference to the adret and the ubac.
    Consequently the following facts are proved in this article.
    (1) Natural environments which are differed by adret and ubac have various effects on the arable land utilization. But the ratio of the area of adret to ubac within cultivated land of farmers causes different aspects in the land utilization as well as the natural environments do.
    (2) The farmers under the circumstances in which they are unable to manage the adret arable land in their neighbourhood have a remarkable tendency to desire to win it even in the far distant places. For the farmers in mountain villages, the desires of obtaining adret arable lands are so strong that they do not mind the disadvantages from the viewpoint of distance, time and labour in reaching their adret arable lands from their residences.
  • 1952 年 25 巻 5 号 p. 206-210
    発行日: 1952/05/01
    公開日: 2008/12/24
    ジャーナル フリー
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