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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Crop Science
Journal Basic Information
Journal DOI :
The Korean Society of Crop Science
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Volume & Issues
Volume 1, Issue 1 - Dec 1963
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Studies on the soybean varieties in Korea -1. Classificiatons of Ecotypes and Maturity groups-
Kwon-Yawl Chang ;
Korean Journal of Crop Science, volume 1, issue 1, 1963, Pages 3~25
Experiments were carried out to classify the ecotypes and maturity groups of soybean varieties, and to make clear the relationships among these ecotypes, maturity groups and some characteristics in the growing and ripening process of soybean varieties in Korea. Soybean varieties used as the material were 138, 57 varieties collected from Japan, America and Canada and 81 local varieties of Korea. These varieties were grown in the Experimental Farms, College of Agriculture, Seoul National University, Suwon, Korea and Chinju Agricultural College, Kyungsang Namdo, Korea. Seed sowing was conducted at 8 times from April15 to July 29, at 15 day-intervals, in 1962. The classification methods of ecotypes and maturity groups applied in this study, and the results obtained are summarized as follows; 1. Ecotypes were classified from the standpoint of the periods from emergence to flowering, the shortened ratio of days from sowing to flowering by delayed sowing, and the periods from flowering to maturity(as shown in Table A). 2. All varieties wer classified into 10 ecotypes of Ia
symbols. Korean local varieties, however, belong to 6 ecotypes of IIb
, respectively(table 1). 3. Durations from sowing to maturity were from 120 to 190 days in April sowing plots of all varieties. From the standpoint of the durations, maturity groups were classified into 9 groups from group I, extreme early, to group IX, extreme late, but our local varieties belong to 5 maturity groups of III, IV, V, VI and VII symbols, respectively(Table 2). 4. Kinds of ecotypes and maturity groups, and the number of soybean varieties belonging to those are as shown in Table B. 5. In this study, it was observed that there were some close relations between these ecotypes and maturity groups (Table 3,4), and among the ecotypes, maturity groups and some other characteristics in the growing and ripening process of the soybean varieties(Table 5). 6. Furthermore, it was also observed that the kinds of ecotypes and maturity groups of recommended varieties in the southern Korean provinces are more numerous than those of the northern provinces in Korea.
Study on the increases in rice yield
Won-Chai Chung ;
Korean Journal of Crop Science, volume 1, issue 1, 1963, Pages 26~31
1. This experiment was conducted with paddy rice in replicated field plot of clay load in Chung Puk College. This experiment has been intended to find out the suitable polt for increasing the yield of rice plant among the 36 plots which consist of 3 factors; deep plowing, heavy fertilizer and thick planting. 2 According to the standard and the heavy fertilizer applications, spikes and grains per phyung have been compared. It has been find out that the higher yield can be obtain in such plots as these; (1) the plot with standard fertilizer application, 15cm plowing depth and 400 hill per phyung, (2) the plot with two times as much fertilizer application, 30 cm plowing depth and 300 hills per phyung, (3) the plot with three times as much fertilizer application, 30cm plowing depth and 300 hills, or 45cm plowing depth and 400hills per phyung. 3. In the yield of brown rice, there has been significant difference in each main factor: hills per phyung, the plowing depth and the amount of fertilizer, and in the first order interaction; depthxfertilizer, depthxhills and hillsxfertilizer, and in the 2nd order interaction; depthx hillsxfertilizer. 4. In the plots with 30cm plowing depth, thick, planting of 200∼300 hills per phyung and two times as much fertilizer, the yield of rice has been superior to others.
THE INFLUENCE OF GIBBERELLIC ACID ON TOBACCO. "The influence on the growth sun-curing tobacco varieties."
Sang-Yull Jae ;
Korean Journal of Crop Science, volume 1, issue 1, 1963, Pages 32~35
In order to investigate the responsiveness of sun-curing tobacco varietie - CHUNGJOO YUB, HATANO and HYANGCBBO - to the Gibberellic Acid 100, 200, and 300 P.P.M. of Gillberellic Acid were sprayed in the field at the stage of just prior to stein elongation. 1. The elongation of stem and leaves were prominent at the concentration of 300 P.P.M. with 30.05~55.22% increase in the stem and 16.96~50.69% increase in the leaves. Hut their width decreased to 70.42~83.66%. 2. The number of leaves did not effected with the treatment meaningly that the elongation of stem was caused by the elongation of intermodes and not by the increase of nodes. 3.12~13.9% increase of raw leaf.es weight were resulted at the concentration of 200 P.P.M. 4. The weight of dry matter were increased by 9~12.2% at the concentration of 200 P.P.M. treatment.
Studies on the characteristics of recommended soybean varieties in Korea 1. on the days from planting to blooming and from blooming to ripening:
Mun-Hue Heu ;
Korean Journal of Crop Science, volume 1, issue 1, 1963, Pages 36~41
10 of Korean domestic recommended varieties(all of them are determinate type) and 10 of introduced varieties from U.S.A.(All of them are indeterminate type) are grown in replicated field in order to clarify the varietal differences in the days from planting to blooming to ripening. The results are summarized as follows; 1. Domestic varieties showed remarkable shortday sensibility for the days from planting to blooming. The difference in sensibility between domestic and introduced was significant while within the domestic group the differences were not significant. 2. The days from planting to blooming were linearly shortened in accordance with the delayed planting from the late April through the late June. 3. Annual variation in days from planting to blooming was not noticeable in the domestic varieties while the introduced ones showed remarkably. 4. The days from blooming to ripening were significantly shortened for the introduced varieties but not significantly for the domestic varieties accordingly with the delayed planting. The mean shortest days of domestic varieties were longer than the mean shortest days of introduced varieties. 5. The days from planting to blooming was shortest when a variety was grown during early August through middle September (with 12.5~13.5 hrs day length and 22~
temperature), and the days from blooming to ripening were also shortest when a variety was matured within same duration. These were true for the varieties of both groups.
GENOTYPIC AND PHENOTYPIC CORRELATIONS IN A SOYBEAN CROSS
Shin-Han Kwon ;
Korean Journal of Crop Science, volume 1, issue 1, 1963, Pages 42~45
In a plant breeding program, an efficient selection of desired characters in a population is important. Generally, many agronomic characters in a given population are determined by polygenes and quantitatively inherited. In practice, the genetic relationship between two observed characters which are undoubtedly subjected to the environmental influence is difficult to identify. In recent years, many workers have attempted to understant the genetic relationship between characters in terms of genotypic correlation, and the knowledge thus gained should furnish many important and useful information for the planning of breeding, selection, and interpretation of the result. The genotypic correlation is the result of pleiotropy, linkage of genes(2, 3, 5, 6, 8) and natural or artificial selection(4). The purposes of this study were to estimate genotyric and phenotypic correlations between all possible pairs of nine characters. and to seek certain characters which may be useful as indicators of certain important agronomic characters. Weber and Moorthy(10), Johnson et al. (5) and Sheth(7) found that in general, the genotypic correlations were higher than the phenotypic correlations. Weiss et al. (11) obtained significant positive correlations between maturity and oil content, maturity and low protein content, and high protein content and low oil content. Weber and Moorthy(10) reported the positive genotypic correlations between flowering and maturity, yield and maturity, yield and plant height, yield and seed weight, and negative genotypic correlations between maturity and oil content, and oil content and seed weight. Johnson et al. (5) studied the genotypic and phenotypic correlations among 24 characters and concluded that selection based entirely on a long fruiting period, lateness, heavy seed, low protein, high oil and resistance to lodging would be effective in increasing yield. Sheth(7) found the following positive associations among characters; height and maturity, yield and lodging, low protein content and high oil content, and yield and low protein content. Hanson et al.(1) also reported high negative correlation between seed yield and protein content.
The study on the effects of the fertilizer of which the chief ingredient were the silicate, manganeize and the iron, to the Rice plant.
Eun-Woong Lee ; Yong-Dea Yun ;
Korean Journal of Crop Science, volume 1, issue 1, 1963, Pages 46~48
1. In this experiment, the effect of the fertilizer of which the chief ingredients are the silicate, the manganeize and the iron, was examined by applying to the rice variety Norm ＃6, in three different vote as 377 gr, 754 gr and 1131 gr per 0.22 a. 2. In the rearing of the rice plant, the effects of the fertilizer was not so significant in the plant height or division. 3. The rice blast and the leaf spot was decreased by appling this fertiliger and the lager dose, the less significantly. 4. The fruiting-rate, yield, and the perfect unpolished-rice weight were increased by appling this fertilizer, and the whole unpolished rice weight and the perfect unpolished rice weight was inproportion to the amount of the fertilizer.