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A mixed forest of nine years old Ryukyumatsu (Pinus luchuensis Mayr) and Soshiju (Acasia confusa Merr.) was investigated in Nakijin, Okinawa, in order to obtain basic data for management of Ryukyumatsu. In the investigation, estimatep were effects of Soshiju on soil fertility by measuring growth of Ryukyumatsu, and condition of broad leaved trees and ground floor plants in the forest. 2. The standing number of Ryukyumatsu and Soshiju ranged from 600 to 11,600 and from 100 to 3,100 per hectare in the experimental plots, respectively. The wide range of the standing was considered to be due to accurance of dead tree at different rate. Ryukyumatsu grew successfully as Soshiju was introduced to the forest at lesser rate. Broad leaved tree ranged from 200 to 4,400 per hectare in the mixed planting plot of Ryukyumatsu and Soshiju. The broad leaved tree was found incneasing as the rate of Soshiju to Ryukyumatsu increased. 3. Height growth of Soshiju was greater than that of Ryukyumatsu in mixed planting plots. The height growth of Ryukyumatsu was greater in the mixed planting plots than in the pure plots of Ryukyumatsu. 4. The brest height diameter of Ryukyumatsu was inverse proportion to stand density of the plots with more than 8,000 standing per hectare but no relation was recognized in the plots with less than 8,000 standing. 5. The total basal area of all tree species and Ryukyumatsu in the exprimental plots was slightly proportional to the number of the trees, and it was greater in the mixed planting plots than in the pure plots of Ryukyumatsu. However, it was found that the basal area of Ryukyumatsu was in inverse proportion to standing density over 8,000 standings per hectare. The basal area of Ryukyumatsu was not affected by the standing density with less than 8,000 standings, and it was greater in the mixed plots than in the pure planting plots of Ryukyumatsu.","subitem_description_type":"Other"},{"subitem_description":"6. The volume of all tree species and Ryukyumatsu in the exprimental plots was slightly proportional to the standing number of the trees, and it was greater in the mixed planting plots than in the pure plots of Ryukyumatsu. However. it was found that the volume of Ryukyumatsu was in inverse proportion to standing density over 8,000 standing per hectare. The volume of Ryukyumatsu was not affected by the standing density with less than 8,000 standings, and it was greater in the mixed plots than in the pure planting plots of Ryukyumatsu. 7. The cover degree of Koshida (Dicrauopteris dichotoma Bernk.) in under vegitation was greater in the pure plots and smaller in the mixed plots. The number of under floor tree was greater in the mixed plots than in the pure plots. The standing number of broad leaved trees was in a range of 200 to 4,400 per hecter, which was predominated by Himetsubaki (Schima superba Gord. et Champ.) and Akamegashiwa (Mallotus japonicus Muell. -Arg.) occuping 71 percent of whole broad leaved trees. 8. According to the result of the present investigation, improved management of Ryukyumatsu would be suggested as follows; It is better to plant Soshiju with Ryukyumatsu to establish Ryukyumatsu forest. Soil fertility of the Ryukyumatsu forest should be improved by accumulation of good humus from Soshiju and other broad leaved trees. Seedlings of Ryukyumatsu should be grown under enough care. It is necessary to keep a proper proportion of Ryukyumatsu seedlings and broad leaved trees in the mixed forest by improvement cutting. And it ought to increaese the volume growth of Ryukyumatsu by conducting the management as mentioned above.","subitem_description_type":"Other"},{"subitem_description":"\u7d00\u8981\u8ad6\u6587","subitem_description_type":"Other"}]},"item_1617186643794":{"attribute_name":"Publisher","attribute_value_mlt":[{"subitem_1522300295150":"ja","subitem_1522300316516":"\u7409\u7403\u5927\u5b66\u8fb2\u5b66\u90e8"}]},"item_1617186702042":{"attribute_name":"Language","attribute_value_mlt":[{"subitem_1551255818386":"jpn"}]},"item_1617186783814":{"attribute_name":"Identifier","attribute_value_mlt":[{"subitem_identifier_type":"HDL","subitem_identifier_uri":"http://hdl.handle.net/20.500.12000/4505"}]},"item_1617186920753":{"attribute_name":"Source Identifier","attribute_value_mlt":[{"subitem_1522646500366":"ISSN","subitem_1522646572813":"0370-4246"},{"subitem_1522646500366":"NCID","subitem_1522646572813":"AN00250548"}]},"item_1617186941041":{"attribute_name":"Source Title","attribute_value_mlt":[{"subitem_1522650068558":"ja","subitem_1522650091861":"\u7409\u7403\u5927\u5b66\u8fb2\u5b66\u90e8\u5b66\u8853\u5831\u544a"},{"subitem_1522650068558":"en","subitem_1522650091861":"The Science Bulletin of the Faculty of Agriculture. 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