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Kang, Ui-Gum;Park, Hyang-Mee;Jung, Yeun-Tae;Park, Kyeong-Bae;Ha, Ho-Sung
- Korean Journal of Soil Science and Fertilizer
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- v.32 no.1
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- pp.62-67
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- 1999
As a basic experiment to enhance the symbiotic utility of atmospheric nitrogen on soybean, host affinities and serological distribution of Bradyrhizobium japonicum indigenous to five Korean upland soils were measured. Based on nodulation, the symbiotic affinities between indigenous B, japonicum and eight soybean cultivars were remarkably different among soil inocula. On the whole, the averaged affinities of B. japonicum populations to soybeans were favorable in order of Goseong > Milyang > Suweon soils, but those in Iksan and Namjeju soils were not, especially for Danweonkong, Jangkyeongkong, and Eunhakong soybean cultivars. Regression analyses between nodules mass and shoot dry weight of soybean yielded model with $R^2=0.51$ for Goseong, $R^2=0.45$ for Milyang, $R^2=0.38$ for Iksan, $R^2=0.28$ for Namjeju, and $R^2=0.24$ for Suweon soils. B. japonicum from sampled soils were serologically fell into more than seven serogroups such as YCK 117(34.1%), YCK 141(6.5%), YCK 321(6.5%), YCK 445(4.7%), YCK 338(2.9%), YCK 150(1.2%), YCK 258(0.6%). The dominant serogroup YCK 117 was distributed 51.9 for Namjeju, 45.8 for Goseong, 41.7 for Iksan. 34.2 for Sueveon, and 11.1% for Milyang soils.
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Kim, C.K.
- Korean Journal of Soil Science and Fertilizer
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- v.2 no.1
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- pp.69-73
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- 1969
In order to improve nearly unarable soils, poor in humus and poorly drained coarse textured, derived from fluvio marine deposit; a factorial experiment have been conducted to find out the influence of compost, increased potassium application and split application of potassium on the yield and germination of soybean variety Haman. The result obtained arid discussed may be summarized as follows. (1) The soybean yield increase was significant by the application of compost, increased amount of potassium and split application of potassium. (2) The application of compost significantly increased the numbers of germination. (3) The increased amount of potash and split application of potash fertilizer showed an apparent effect on the increase of germination and grain numbers per plant. (4) There was a positive relation between the number of grains per plant and the number of pods per plant, however, the increased numbers of pods per plant has not a direct effect for the increase of soybean yield per unit area. (5) Above results suggests that the improvement of nearly unarable Woolsuk Island soils derived from fluvio marine coarse material may be possible by the application of compost, increased amount and split application of potash fertilizer.
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Sohn, Yong-Man;Song, Jae-Do;Jeon, Geon-Yeong;Kim, Doo-Hwan;Park, Moo-Eon
- Korean Journal of Soil Science and Fertilizer
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- v.43 no.5
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- pp.529-539
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- 2010
In order to evaluate the effect of soil salinity and culturing conditions including compost application and vinyl mulching on the maintenance of ridge and the growth of upland crops, three crops such as corn, soybean and sweet potato were experimented by using three or four cultivars of crops in the Saemangeum reclaimed tidal land. Average soil salinity before seeding was 2 dS $m^{-1}$, which was low enough for general upland crops to grow. However, high soil EC more than 16 dS $m^{-1}$ was observed in some parts of the experimented field. In the experiment, it was concluded that growth retardation and yield reduction of summer upland crops might be from severe erosion of ridge, soil compaction, flooding or wet soil condition and high salinity of some parts, and then these deteriorations were possibly improved for good crop growth and yield increase by compost application and vinyl mulching cultivation in the Saemangeum reclaimed tidal land.
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