• KOREAN JOURNAL OF CROP SCIENCE
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• v.31 no.4
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• pp.483-492
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• 1986

To find out the responses of plant growth, nodulation, and yield of soybean and their varietal differences to different soil pH, 16 soybean cultivars were examined under three different levels of soil pH. In general, as the soil pH decreased, plant growth, nodulation, yield and yield component and protein con-tents of grains were decreased in most of cultivars studied. But there were significant varietal differences in the responses of the characters investigated to soil pH. Jangbaegkong was evaluated as the most tolerant cultivar to acid soil, and Ulsan, Bongeui, Hwanggeumkong, and LC7852 were also relatively torelant to acid soil. There were significant correlation between soil pH and grain yield in 7 cultivars among 16, but were not in other cultivars.

• Korean Journal of Soil Science and Fertilizer
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• v.21 no.2
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• pp.141-148
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• 1988

Though the cultivation history of soybean in Korea is relatively long, taxonomical study on symbiont nodule bacteria, Rhizobium japonicum is not carried out yet systematically. This work was for the taxonomical study on Korean native R. japonicum by recognizing isolates seroimmunologically as well as for the elucidation of its affinity with host soybean variety. Twenty seven isolates from 13 soybean cultivars cultivated at Seoul National University's experiment field and 6 strains of R. japonicum preserved in our laboratory have been tested. Tube agglutination test, agglutinin adsorption test, and gel immune diffusion test were used. The results obtained are as follows: 1. Twenty five isolates and strains of R. japonicum among 33 were classified into 4 serogroups and identified as indivisual serotype. 2. Two isolates isolated from Hill and Milyang cultivars, 2 isolates from Bangsa and Jangbaek, and 4 isolates from Paldal, Sae-al, and Jangbaek were identified as the same serotype respectively. 3. Seroimmunological tests may be adapted for the elucidation of the affinities between the strains and soybean cultivars as well as strain recognition and systematic classification of Korean native R. japonicum.

• Korean Journal of Environmental Agriculture
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• v.18 no.1
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• pp.66-69
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• 1999

To investigate the hormetic effect of the low dose ${\gamma}-ray$, soybean(Glycine max L.) seeds of three cultivars (Hwangkeumkong, Bansakong, S900 cv.) were irradiated with the dose of 0.5∼20.0 Gy and cultivated in the experimental field. The hormetic effects of the low dose ${\gamma}-ray$ on the growth of field experiment were different from each cultivar, that is, more effective in the S900 cultivar of black seedcoat color than in the Hwangkeumkong and Bangsakong of yellow ones. The germination rate of S900 cultivar increased about 30% in the 0.5Gy irradiated group compared with that of the control. The plant height of the 4.0Gy irradiated group in both Bangsakong and S900 cultivar increased 15% more than that of the control. Grain yield and the number of pod in 1.0 Gy and 4.0 Gy irradiated group of S900 cultivar and that of 2.0 Gy irradiated group of Hwangkeumkong increased 25 and 35% on the average, respectively.

• Korean Journal of Food Science and Technology
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• v.22 no.3
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• pp.357-362
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• 1990

Soy yoghurt was prepared from 19 soybean cultivars with the use of L. acidophilus KCTC 2182. Various characteristics of fermented soymilk and the ratio of product recovery in soy yoghurt were investigated The mean crude protein content of the soy yoghurt was 2.74% with a range of 2.58-2.91% and the mean crude fat content was 1.49% with a range of 1.34-1.85%. Total solids recovered from original soybean in soy yoghurt ranged 52.14-61.54% with a mean value of 56.17%. Crude protein recovery in soy yoghurt ranged 59.22-67.5% with a mean value of 63.32%, Crude fat ranged 65.8-86.02% with a mean value of 72.57%. Titratable acidity of soy yoghurt ranged 0.20-0.41%. Viable cell count of soy yoghurt ranged $3.83{\times}10^8-3.22{\times}10^9/ml$ and the amount of separated whey ranged 1.4-8.2ml per 100ml of soymilk.

• Korean journal of applied entomology
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• v.15 no.2 s.27
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• pp.61-68
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• 1976

Leading soybean cultivars such as Kwanggyo, Yugu No.3, Dongbugtae, Gangrim, and Eundaedu were heavily diseased by a virus in Korea. The disease was most severe in the northern provinces where soybean mosaic virus also occurrs, but the disease has also been observed in other provinces where soybean diseases are less prevalent. The disease symptoms were similar to bud blight caused by tobacco ringspot virus; but this was not confirmed in inoculation tests on indicator plants and serological experiments. There were some differences in varietal susceptibility to the disease, with symptom variation depending on the soybean cultivar and source of inoculm. Disease symptoms on infected soybean plants were mottling and necrosis. The present results, therefore, indicate some strains of SMV or a mixture of legume viruses may or may not be responsible for the disease.

• Applied Biological Chemistry
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• v.33 no.2
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• pp.109-115
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• 1990

This study was carried out to investigate the effect of L-cysteine and sodium sulfite on heat inactivation of soybean trypsin inhibitor(STI) and to determine cultivar difference in the inhibitory activity of STI. Effect of L-cysteine and sodium sulfite at different concentrations, pH's, and lengths of treatment on inactivation of STI were studied. The inactivation of STI was spectrophotometrically determined by measuring the rate of production of p-nitroaniline from synthetic substrate, N-benzoyl-DL-arginine-p-nitroanilide. Addition of L-cysteine and sodium sulfite increased magnitude of heat inactivation and greatly inhibited the re-activation of STI. There was no difference STI inactivation in among soybean cultivars employed. The trypsin inhibitory activity of STI of the soybean cultivars ranged from 64.7 to 86.4 TIU(trypsin inhibitor unit) per gram soyflour and the decreasing order of the TIU was Jangback>Hill>Jangyeab, Kwangkyo> Danyeab>Dangkyung>Paldal, Saeal, Duckyu>Hwangkeum. Inhibitory activity of STI was correlated with cysteine $content(r=0.6568^*)$ and with $digestivility(r=-0.7695^{**})$, but there was no correlation between the protein content and the inhibitory activity of STI.

• Applied Biological Chemistry
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• v.7
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• pp.79-84
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• 1966

1. In order to elucidate the differences between varieties of Korean soybean, forty-nine subjects were examined for their chemical constituents. Their proportions varied considerably with the differences in variety. The moisture varied from 10.93% to 12.57%(aver. 11.95%), protein; 33.79% to 47.00%(aver. 39.8%) crude fat; from 16.32% to 24.79%(aver. 19.2%), crude fiber; from 3.03% to 5.57%(aver. 3.98%), ash; from 3.95% to 5.23%(aver. 4.6%) and nitrogen free-extracts (earbohydrates); from 16.58% to 26,81% (aver. 20.57%) Chemical composition of soybean was affected by the varieties as well as their localities of growth. 2. Of the total protein, 33.26% based on the soybean meal was soluble protein and 1.94% insoluble protein in average.

• Korean Journal of Food Science and Technology
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• v.14 no.2
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• pp.106-111
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• 1982

To investigate the soybean trypsin inhibitors from seven varieties of soybeans and their twenty one $F_1-hybrids$, water soluble proteins were extracted. Trypsin inhibitors were isolated from those proteins and purified by sephadex G-75 column chromatography and polyacrylamide gel electrophresis. Total 16 kinds of trypsin inhibitors were isolated. From each variety of soybeans, $5{\sim}12$ kinds of trysin inhibitors could be detected and among them, 5 kinds of trypsin inhibitors were mainly distributed.

• Proceedings of the Korean Society of Crop Science Conference
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• 1977.05a
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• pp.19.1-19.1
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• 1977

• Proceedings of the Korean Society of Crop Science Conference
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• 1977.05a
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• pp.18-18
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• 1977