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Table of Content

    15 April 1956, Volume 22 Issue 2 Previous Issue    Next Issue
    SOURCES OF FOOD AND INCREASE OF POPULATION
    Sun Ching-chih
    1956, 22 (2):  121-133.  doi: 10.11821/xb195602001
    Abstract ( )   PDF (898KB) ( )   Save
    According to the Yearbook of Food and Agricultural Statistics, Part one, Vol.Ⅷ, 1953, there are in the whole world altogether 13,300,000,000 hectares of cultivated lands (including orchards), constituting, roughly speaking, 9% of tillable land on earth, to say the most.
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    TOPOGRAPHICAL FEATURES AND FROST DAMAGE
    L? Chung
    1956, 22 (2):  149-158.  doi: 10.11821/xb195602002
    Abstract ( )   PDF (694KB) ( )   Save
    The author has in the past four years been afforded opportunities to inves-tigate the problem of frost damage, such as the frost bite of wheat in North China, of forage plants in the Changpei Area, and of tropical plants in South China. In the course of these ins=estigations the author has keonly felt the close relationship between topography and frost damage. If favourable topography is chosen for plants, the frost damage rrLay be avoided or lessened to some extent. In this paper, the author based on leis past investigations makes a com-prehensive report particularly on mutters concerning topography in holes that it map be helpful to agriculture in taking precautions against frost damage.
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    FRAGMENTARY GEOMORPHOLOGICAL OBSERVATIONS ON THE CHIN-HO BASIN
    Chen Shu-p'eng, Lu Jen-wei and T'eng Chu
    1956, 22 (2):  159-183.  doi: 10.11821/xb195602003
    Abstract ( )   PDF (2349KB) ( )   Save
    The Chin-ho is a tributary of the Huangho, entering the latter east of the Sanmen Gorge after flowing 450 km in central Shansi (Fig. 1). The upper streiun part of the Chin-ho basin, some 1000 m above sew-level, is a dissected plateau with Mills and ridges rel>resenting the remnants of a ter-tiary peneplain (Fig. 16) that truncates the gently folded strata (Figs. 2,5,6). Loessial materials spread all over; they vary in thickness and chemical tom-position from place to place and regularly from N to S. Five types of their occurrence may be recognised (Fig. 9). The stream 1;ttern is sul}erposeM from the old surface but slightly modified by minor sturctures(Pig. 10).The several ruptures de pence plus the three steps of rock terraces disclose the rehe2ted rejuvenation (Figs. 15,16). The deep gorges in alternation }itl} brow valleys, the cut-off meander-cores and the various loessic forms add to the comple};ity and differentiation of relief (Figs. 22-25). The lower course of the Chin-ho, after piercing through the Tai-hang rwnge, built a vast fan-shaped plain with loassial material:. Here, for the last 2000 years, the land surface, ns well as the hydrographic conditions, has been greatly modifiod by irrigation systems and other conservancy works.
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