• Korean Architects
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• s.513
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• pp.16-21
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• 2012

• Journal of Korean Society of Forest Science
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• v.16 no.1
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• pp.63-67
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• 1972

• Journal of Forest and Environmental Science
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• v.33 no.1
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• pp.74-77
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• 2017

The purpose of this study is to analyze the effect of thinning intensity on the growth of large diameter trees in Korean white pine (Pinus koraiensis S. et Z.) plantation. Eight thinning plots were analyzed by categorizing into heavy thinning, light thinning, no thinning (control) according to thinning intensity. As a result, average DBH increased more in heavy thinning plots than in light thinning or unthinned plots. The number of large trees (DBH>25 cm) were obviously shown the most in heavy thinning plots. It is considered that heavy thinning is needed for the production of the large diameter trees.

• Journal of Forest and Environmental Science
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• v.28 no.2
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• pp.68-74
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• 2012

A total of 45 Pinus sylvestnis var. mongolica trees from 9 plots in northeast China were destructively sampled to develop aboveground prediction equations for inventory application. Sampling plots covered a range of stand ages (12-47-years-old) and densities (450-3,840/ha). The distribution of aboveground biomass of whole-trees and tree component (stems, branches and leaves) of individual trees were studied and 4 equations were developed as functions of diameter at breast height (DBH), total height (HT). All the equations have good estimation effect with high prediction precision over 90%. Forest biomass was estimated based on the individual biomass prediction equations. It was found forest biomass of all organs increased with the increasing of stand age and density. And the period of 45-50 years was the suitable harvest time for Pinus sylvesris plantation.

• Korean Journal of Environmental Agriculture
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• v.19 no.2
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• pp.188-190
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• 2000

We explored changes in soil nitrogen (N) availability in a thinned (control, light, moderate, and heavy thinning) Larix leptolepis plantation determined by using ion exchange resin bags. Nitrogen availability varied among measurement periods, however, total available N (ammonium plus nitrate) concentrations did not change significantly in the 1 year since thinning. We found higher N availability in summer and fall than in winter.

• Journal of Korean Society of Forest Science
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• v.65 no.1
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• pp.96-99
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• 1984

The analysis of data about the 6-year-old Korean pine plantation was done in order to decide the suitable plot size for the survey on several stand characters. The plot size of at least 0.04 ha was recommendable for the investigation of height; but the size of 0.08 ha for D.B.H. and for crown width.

• The Korean Journal of Ecology
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• v.10 no.1
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• pp.33-42
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• 1987

The forest vegetation of Mt. Chil-gab was studied from 1983 to 1984. By Z-M method, the actual vegetation was classified into 8 communities and 1 plantation; Quercus variabilis, Q. variabilis-Styrax obassia, Q variabilis-Q. dentata, Q. varisbilid-Q. mongolica, Q. acutissima-Q. variabilis, Zelkova serrata-Styrax japonica, Capinus laxiflora, Pinus densiflora community and Larix leptolepts plantation (on the mountain foot) community. The plant communities of Q. variabilis and S. japonica as edaphic climax, in terms of the isopleth line of warmth index. Based on the data of vegetation survey and environmental analysis, the actual vegetation map and potential natural vegetation map were perpared with scale of 1/25, 000.

• Journal of Korean Society of Forest Science
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• v.96 no.2
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• pp.145-150
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• 2007

This study was conducted to elucidate the mid-growth of Norway spruce at the age of 27 and select the superior provenances in Korea. Growth performance of twenty-four provenances from Germany and Rumania were investigated in four plantations. Significant differences were found in growth (height, DBH, volume) with plantations. Maximum growth were detected on plantation Chuncheon which located in most northern area, and minimum growth were detected on plantation Wanju located in most southern area. The rank of height in provenances has fluctuated, but superior/inferior groups have been almost fixed. 840-23, 840-10, 840-19 in Germany, G1-64-57, G1-64-54 in Rumania proved excellent provenances. Height in early stage positively correlated with that in late stage. The growth was positively correlated with latitude and altitude of plantations, but negatively correlated with temperature.

• Journal of the Korean Wood Science and Technology
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• v.50 no.1
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• pp.46-58
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• 2022

Wood from tropical plantation forests has lower physical and mechanical properties than mature wood. Furfuryl alcohol (FA) impregnation into the wood could help to enhance hydrophobic properties, dimensional stability, and structural strength. Furfurylation was applied to specimens of the following four fast-growing tropical wood species: jabon (Anthocephalus cadamba), sengon (Falcataria moluccana), mangium (Acacia mangium), and pine (Pinus merkusii). The discoloration and physical and mechanical properties were subsequently measured, and the results showed that furfurylated wood had a darker color and better physical and mechanical properties than untreated wood. Specifically, the furfurylated wood had higher density, modulus of elasticity, and hardness and lower moisture content, water absorption, swelling, and shrinkage. The furfurylation significantly enhanced physical and mechanical properties.

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2005.10a
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• pp.106-108
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• 2005