• Journal of the Korean Society of Tobacco Science
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• v.22 no.1
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• pp.71-75
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• 2000

The genetic makeup could be the most important among many factors affecting yield and quality of tobacco(Nicotiana tabacum L.). The mammoth gene found in N. tabacum is associated with greater leaf number and poor leaf quality. This study was carried out to obtain the basic information about the inheritance of mammoth gene and white flower color. Two flue-cured breeding lines, KF 9373-2 and KF 8832-85, F$_1$, F$_2$, two parents backcrossed with F$_1$, and F$_3$ lines derived from cross of above two lines were investigated for flowering type(mammoth gene) and flower color. All plants of F$_1$ population revealed normal flowering type and pink flower color. The progeny of F$_2$ generation was segregated into the phenotypic ratio of 9 : 3 : 3 : 1 with normal flowering type and pink flower color, normal and white, non flowering type(NF) and pink, and NF and white, respectively. Among the progenies of back-crossing populations, the flowering type showed a segregation ratio of 1 : 1 as normal and NF in BP$_1$ and flower color did also 1 : 1 as pink and white in BP$_2$. All lines have the mammoth gene in F$_3$. that were selected in F$_2$ progeny as non flowering. But 9 lines among 14 were segregated with 3 : 1 as pink and white flower in F$_3$. which were selected in F$_2$ as pink flower color. These results indicated that the characters of mammoth gene and white flower were controlled by a pair of recessive genes, respectively.

• Korean Journal of Food Science and Technology
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• v.21 no.6
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• pp.851-856
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• 1989

The physical properties of essential oil of nutmeg extracted in different methods (SDE, Solvent, $CO_2$) were investigated and also the components of essential oil were analyzed using G.C. and G.C./ Mass. Solvent extraction yield was 23% and was higher than those of SDE extraction and $CO_2$ extraction. From the analysis result and physical properties of nutmeg oil, it was conformed that the nutmeg used In this experiment was similar to East Indies type. The content of sabinene was 3.6-14.1%, 28.4-48.7% for myristicin, 1.2-2.1% for elemicin, and 3.6-5.6% for safrole. The camphene was identified in SDE extracts but not in $CO_2$ extracts. The volatile components of SDE extracts and solvent extracts contained large amount of monoterpene and terpene alcohol but $CO_2$ extracts aminly contained aromatic compounds.

• Korean Journal of Soil Science and Fertilizer
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• v.22 no.4
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• pp.290-295
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• 1989

An incubation study was conducted to examine the effect of soil pH and temperature on nitrification potential of 8 different soil series applied with no-N and 200 ugN/g soil as a compound fertilizer at 60 % moisture content of maximum water holding capacity for 8 weeks, whose series were ranged from acid to mild alkali as Gopyeong(Jincheon, pH 4.51), Yesan(Jincheon, pH 4.54), Jigog(Eumseong, pH 4.71), Songsan(Goesan, pH 5.01), Angye(Seongju, pH 5.34), Banho(Seongju, pH 5.73), Weongog(Jincheon, pH 5.93), and Banho(Seongju, pH 7.70), respectively. Interrelationship between the nitrifiable and the net $NO_3-N$(N added plot-no-N plot) accumulated in the soil and tobacco yield in the no fertilizer plot were investigated as well. 1. Nitrification response was various according to soil characteristics at each temperature condition showing that nitrifiable $NO_3-N$ values of the soils were much higher at $25^{\circ}C$ than $15^{\circ}C$. And difference of nitrification potential affected by temperature was markedly distinguishable from 2 weeks after incubation and was showing a tendency to reduce with increasing of soil pH. 2. At each temperature condition, net $NO_3-N$ accumulated at 2 and 4 weeks after incubation was positively correlated with soil pH. 3. Tobacco yield in the no fertilizer plot was more highly correlated with the values of nitrifiable and net $NO_3-N$ accumulated at $15^{\circ}C$ similar to soil temperature in rhizosphere of early stage of tobacco growth than those at optimum temperature($25^{\circ}C$).

• Korean Journal of Food Science and Technology
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• v.18 no.2
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• pp.168-172
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• 1986

The swelling and hydration properties of Korean red ginseng tails and yield of total solids in extract were studied during extraction with ethanol solution having a concentration of 0-90% at $60-100^{\circ}C$. Extraction was carried out 5 times which was taken 8 hours per each time of extraction. The swelling, hydration and total solids yield were increased as the ethanol concentration decreased and as the extraction temperature raised. The cumulative value of solids yield suggested that three times of extractions with water or 70% ethanol were effective to recover more than 84%. Linear regression analysis on the properties investigated and extraction conditions showed a linear logarithmic relationship .

• Korean Journal of Soil Science and Fertilizer
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• v.17 no.4
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• pp.371-374
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• 1984

This study was conducted to establish the statistic model by use the soil physico-chemical properties for prediction of ginseng root yield. Twenty seven farmer's red ginseng fields from the ginseng growing area were chosen for this study. Root yield of 6-year old ginseng was $1.85{\pm}0.54Kg$ per $3.3m^2$, and it showed positive correlation between yield and porosity, content of clay, clay and silt, organic matter, cation exchange capacity of the field soils, respectively, but showed a negative correlation with available phosphate. Prediction of root yield was possible with equation combined with porosity($X_1$), content of clay($X_2$), clay and silt($X_3$), available phosphate($X_4$), CEC($X_5$), the equation is $Y=-1.175+0.033X_1-0.04X_2+0.012X_3-0.001X_4+0.171X_5$. Standard partial regression coefficients were 0.3799 in CEC, 0.1550 in content of clay, 0.0890 in porosity, 0.0599 in content of clay silt, and -0.0138 in available phosphate.

• Korean Journal of Soil Science and Fertilizer
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• v.33 no.4
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• pp.221-233
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• 2000

Evaluation method of soil fertility by application of geographic information system (GIS) which includes landscape characteristics and soil map data was investigated from productivities of red pepper and tobacco grown on the fields with no fertilization. Total 131 fields experiments, 64 fields of red pepper and 67 fields of tobacco were conducted from 22 and 23 fields for red pepper and tobacco, respectively, located at Cheangweon and Eumseong counties in 1996, from 20 and 25 fields at Boeun and Goesan counties in 1997, and 22 and 19 fields at Jincheon and Chungju counties in 1998. All the experimental sites were selected on the basis of wide range of distribution in landscape and soil attributes. Dry weights and nutrients (N, P and K) uptakes by red pepper plant and tobacco leaves were considered as basic fertility of the soil (BFS). The BFS was estimated by twenty-five independent variables including 13 chemical properties and 12 GIS data. Twenty-five independent variables were classified by two groups, 15 quantitative variables and 10 qualitative variables, and were analyzed by multiple linear regression (MLR) of REG and GLM models of SAS. Dry weight of red pepper (DWRP) and dry weight of tobacco leaves (DWTL) every year showed high variations by five times in difference plots with minimum yield and maximum yield indicating the diverse soil fertility among the experimental fields. Evaluation for the BFS by the MLR including independent variables was better than that by simple regression showing gradual improvement by adding chemical properties, quantitative variables, and qualitative variables of the GIS. However the evaluation for the BFS by the MLR showed the better result for tobacco than red pepper. For example the variability in the DWTL by MLR was explained 34.2% by only chemical properties, 35.0% by adding quantitative variables, and 72.5% by adding both the quantitative and qualitative variables of the GIS compared with 21.7% by simple regression with $NO_3-N$ content in soil. Consequently, it is assumed that this approach by the MLR including both the quantitative and qualitative variables was available as an evaluation model of soil fertility for upland field.

• Journal of Ginseng Research
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• v.6 no.2
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• pp.154-161
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• 1982

To determine the effects of mulching with the hulls of rice on the growth of the ginseng plant and changes of its growing environment-soil moisture content. subterranccan temperature and soil hardness- were investigated under different light intensity such as 5%, 10%, 20%, and 30% light transmittance rate(LTR). The results obtained were as follows; 1. Soil moisture content under the shading was decreased as the increase of light intensity, whereas it was increased about 1.5% in each plot of LTR by the mulching. 2. Suberranccan temperature under the shading was increased as the increase of light intensity. It was decreased on a hot day by the mulching but increased on a cold day. 3. Soil hardness was decreased by the mulching. 4. Sprouting date of the ginseng plants was acclerated for 7 days and sprout periods were shortened for f days by mulching compared to the non-mulching treatment. 5. Missing plant rate was increased severely as the increase of light intensity more Than 20% LTR In the non-mulching plots but did not severe in the mulching plots. Missing plant rate was decreased remarkably by the mulching. The degree of decrease was larger as the increase 6f light intensity. 6. Root yield was increased in the mulching plots compared to the non$.$mulching plots. The degree of increase was larger as the increase of light intensity. The highest yield was obtained at 20% LTR with mulching.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.34 no.2
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• pp.198-203
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• 1989

Field experiment was conducted to find out the effect of lime materials application on yield, and chemical composition of Burley 21 in 1986. Lime materials and application rate were CaSO$_4$ : Ca 35kg/l0a. CaCO$_3$ : Ca 35kg/l0a and Liming: pH6.5. Contents of Ca and Mg in fresh or cured leaves were increased, but AI, Fe and Mn were decreased by applying lime materials. Yield were increased by applying lime materials. Among lime materials treatment, yield of limed and CaCO$_3$ plot were higher than that of CaSO$_4$ plot. Value per kg of cured leaves was not affected by applying lime materials. Cured leaves of CaSO$_4$ plot contained higher NH$_3$-nitrogen and alkalinity number of water insoluble ash than those of unlimed plot. Cured leaves of CaCO$_3$, plot contained higher alkalinity number of water soluble ash, insoluble ash and volatile neutral constituent, but lower protein-nitrogen and petroleum ether extracts than those of unlimed plot. Cured leaves of limed plot contained higher alkalinity number of water soluble and insoluble ash, NO$_3$-nitrogen and volatile neutral constituents, but lower protein -nitrogen, nicotine and petroleum ether extracts than those unlimed plot. Yield was increased, however leaf Quality in respect to chemical and organoleptic characteristics were not affected considerably by applying lime materials. Therefore, it suggests that controlling the soil pH about 6.5 by liming might be necessary for tobacco cultivation.

• Journal of the Korean Society of Tobacco Science
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• v.14 no.1
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• pp.66-78
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• 1992

The essential oil of Korean valerian root ( Valeriana fauriei roar. dasycarpa Hara) was isolated by simultaneous distillation Sl extraction. The oil content of fresh root was 0.7% (wb) and that of dried root was 2.1 5 (db) and sensory analysis of the oil indicated sweet-balsamic, woody and floral characteristic aroma notes. The oil was fractionated into one hydrocarbon fraction and three oxygenated hydrocarbon fractions by using silica gel column chromatograpy. Each fraction was analyzed by capillary GC and GC-MS. Out of 81 characterized compounds, the major compounds were a-pinene, camphene, $\beta$-pinene, bornyl acetate, borneol , bornyl iso-valerate and sesquiphellandrene and the characteristic floral and woody aroma of neutral fraction of Korean valerian root could be due to be the presence of oxygenated compounds such as borneol, bornyl acetate, bornyl iso-valerate, p-ionone ana $\beta$-ionone epoxide. Comparing the yield of Korean valerian root with those from other origins reported, oil content of Korean valerian root was higher than those of European and Indian origins.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.27 no.2
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• pp.163-168
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• 1982

Tobacco seedling which were sown 20 days earlier than conventional, both at 4-5 and 7-8 leaf stages, were once sprayed with ethrel (0, 500, and 1,000 ppm concentrations) and transplanted simultaneously to investigate the subsequent effects. The number of leaves and days to flower were tend to decrease when seedlings were treated at an early developmental stage than at later stage. The highest yield was obtained from seedlings treated with 500 ppm of ethrel at the 4-5 leaf stage, showing 40% increment above conventional seedlings, partly due to more number and bigger size of the leaves. Finally possible mechanisms for the result were discussed.