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Article type: Cover
1994 Volume 22 Pages
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1994 Volume 22 Pages
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1994 Volume 22 Pages
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1994 Volume 22 Pages
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Article type: Appendix
1994 Volume 22 Pages
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Article type: Index
1994 Volume 22 Pages
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Kyoei NISHIKAWA
Article type: Article
1994 Volume 22 Pages
1-18
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This paper describes the recent trends in national forest inventory systems of the advanced nations. Each system is analyzed according to sampling methods, itemes of inventory, GIS, remote sensing, information systems, publications and users. The main characteristics common to these countries are 1) Gathered information cover all kinds of timber and non-timber resources, 2) Objectives of inventory are changed from repeated temporary field inventories to monitor the changes of forests and environments. 3) Remote sensing and GIS techniques are now being applied to CFI systems to provide up-to-date forest information for local areas, and 4) Computer-aided systems have been developed to acquire and process data efficiently. A modified forest register system combined with a monitoring survey based on CFI and remote sensing is recommended for Japan.
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Masahiro AMANO, Ken SUGIMURA, Sang-Kyun Kim, Hyun Je Cho
Article type: Article
1994 Volume 22 Pages
19-29
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Because of expanding populations in large East Asian cities, urban sprawl, chaotic expansion and resulting disappearance of urban forests are serious problems confronting the living environment. Questionnaires were distributed to residents of Seoul and Kobe to determine their perceptions of the forests surrounding their cities. Results show the order of residents' priorities for forest uses to be (1) water and land conservation, (2) wildlife conservation, (3) preservation of the scenic landscape, and (4) timber production. The patterns of responses in Kobe and Seoul were nearly identical. The correlation coefficient for both patterns was 0.96. The most important forest use, water and land conservation, was further divided into subcategories. Kobe residents ordered their priorities as: (1) flood control, (2) stable water supply, (3) mitigation of slope failure, and (4) preservation of water quality. Seoul residents ranked their priorities as: (1) preservation of water quality, (2) stable water supply, (3) flood control, and (4) mitigation of slope failure. In this case the respondent pattern of two residents' citizens were completely different. The correlation coefficient of the two patterns was -0.12. We can make the following conclusion from the survey results: (a) The urban forest must be maintained in coincidence with the characteristics of each city, (b) The urban forests are important for recreational use. (c) Timber production is not recommended in urban forests. (d) Government expenditures for the upkeep of urban forests are supported by local residents.
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Yuji UOZUMI
Article type: Article
1994 Volume 22 Pages
31-41
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Forests on urban fringes are very important resources to make the urban district safer and more attractive. However deforestation is unavoidable due to urban encroachment. Therefore it is necessary to find new successful strategies to maintain urban forests. Forests in urban districts decline as population density increases. Each urban district has its own deforestation trend. For example, the data for 34 municipalities in Osaka prefecture over 25 years show various deforestation trends, including deforestation predictions for a 10 percent increase in population in the year 1990 which varied with each district. The highest level of deforestation was 73 percent, with 4 municipalities having a deforestation rate of over 50 percent. On the other hand, there were 10 municipalities with a deforestation rate of less than 5 percent. In the districts with higher deforestation rates, it will be necessary to implement urgent, hard-hitting and expensive measures such as direct government controls. But in districts with lower deforestation rates, indirect and inexpensive means such as environmental monitoring or public information campaigns will be more effective in the long run. In general, it is very expensive to preserve forests in urban districts. But new ideas will save much money and be more successful in achieving this goal.
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Xiao-Xian ZHENG
Article type: Article
1994 Volume 22 Pages
43-59
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The purpose of this paper is to propose a decision support system using- an information system for watershed forest management, which provides more practical information on long rotation forest planning in the Tenryu River watershed in Hase Village, Nagano Prefecture. First, GIS was used to divide the planning area into 4 working blocks, one each for large log production, middle log production, small log production and ecological conservation, based on site quality, locality and log demand. Next, the growth and the volume of yield and utilization were predicted for various thinning patterns and felling age by a simulation model using a system yield table for karamatsu(Larix Kaempferi) even-aged stands. The results were as follows: 1) Low thinning is the most suitable method. 2) Thinning is necessary every 10 or 15 years. 3) The rotation in maximum final mean annual increment of yield volume is about 50 years. 4) The rotation in maximum final mean annual increment of utilizing volume is about 50 years for I and II site classes, about 60 years for III site class. Finally, the best felling ages were judged to be about 70 years for large and middle log production, and 60 years for small log production.
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Hiroyuki TAKIGUCHI, Hiroyuki WATANABE, Kazukiyo YAMAMOTO
Article type: Article
1994 Volume 22 Pages
61-65
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In an effort to develop a model for accurately predicting foliage area (FA) of a branch of Cryptomeria japonica, we analyzed the relationship between FA and the basal area inner bark of the branch (P_0BA), and between FA and the cross-sectional area inner bark of the branch measured at the farthest point from the tip of the branch to which foliage shoots were still attached (P_1BA). The FA-P_1BA relationship had a higher correlation than the FA-P_0BA relationship, and showed no difference among trees. The FA-P_1BA relationship was expressed as FA = 0.627 P_1BA. The constant relationship of FA-P_1BA offers a convenient means of estimating the FA in C. japonica.
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Masanobu YAMANE
Article type: Article
1994 Volume 22 Pages
67-71
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Shogo KOBAYASHI
Article type: Article
1994 Volume 22 Pages
73-78
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Yukio TERAOKA
Article type: Article
1994 Volume 22 Pages
79-82
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Norihiko SHIRAISHI, Kazuhiko SAITO
Article type: Article
1994 Volume 22 Pages
83-89
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1994 Volume 22 Pages
90-91
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1994 Volume 22 Pages
92-93
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1994 Volume 22 Pages
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1994 Volume 22 Pages
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1994 Volume 22 Pages
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1994 Volume 22 Pages
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1994 Volume 22 Pages
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1994 Volume 22 Pages
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1994 Volume 22 Pages
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Article type: Cover
1994 Volume 22 Pages
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