• Proceedings of the Korean Environmental Sciences Society Conference
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• 2018.10a
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• pp.174-174
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• 2018

• Proceedings of the Korean Society of Crop Science Conference
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• 2004.04a
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• pp.118-119
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• 2004

• Proceedings of the Korean Society of Crop Science Conference
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• 2018.10a
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• pp.41-41
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• 2018

• Proceedings of the Korean Society of Crop Science Conference
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• 2021.10a
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• pp.89-89
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• 2021

• Proceedings of the Korean Society of Crop Science Conference
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• 2022.04a
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• pp.41-41
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• 2022

• Korean Journal of Soil Science and Fertilizer
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• v.9 no.2
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• pp.99-105
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• 1976

After investigation of soil characteristics the properties of a reclaimed marine soil (Gupo series) distributed along the southern coastal areas of Korea are summarized as follows: 1. Gupo soils distributed in the southern Ria coastal area are derived from rolling to hilly materials and are poorly sorted with less influences of river fluvial action. These soils have high content of sand compared with the broad fluvio-marine soils in the western coastal areas. 2. The morphological features of the poorly drained Gupo soils are greyish brown sandy loam with a few yellowish mottles in the surface horizon and are grey sandy loam with a few gravel in the sub-strata. The ground water table remains around 10-30cm below the surface. These soils, recently reclaimed younger deposits, do not show any evidence of illuviation. 3. The "n" value (about 0.8) of the Gupo soils indicates physically unripened soils. 4. pH value of these soils shows more than 8.0 throughout the profile. Organic matter contents are extremely low (around 0.5%) except 1.2 percent in the surface horizon. C.E.C. ranges from 7 to 9m.e/100g which is lower than average in the country. The ratios of extractable cations such as Ca, Mg, Na and K of the surface horizon are 20:7:4:1. Base saturation is more than 60%. Available phosphate content is very low that is less than 25 ppm. Electric conductivity of the soils at $25^{\circ}C$ ranges 7 to 12 mmhos/cm and increased with depth. 5. According to classification of soil based on physical ripening, the Gupo soils can be classified into "Unripe soils with half-ripe sub-soils". The soils could be classified into "Hydric Haplaquents" in the original of the 7th Approximation (1960), but into "Typic Haplaqents in the supplement of 7th approximation which the physical ripening condition is not clearly expressed. Soil Taxonomy, apparently the final version of the 7th approximation, defines the soils as "Haplic Hydraquents" that clearly show the condition of physical ripening as well as other properties. Other several classification systems applied do not describe physical ripening condition of the soils.

• Journal of agriculture & life science
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• v.45 no.5
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• pp.17-23
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• 2011

Growth characteristics and adaptability of 10 poplar clones planted at a reclaimed tidal flat were evaluated. The contents of $Na^+$, $Ca^{2+}$ and $Mg^{2+}$ were 10.0, 3.4 and 1.5 times higher, respectively than those of control although the electrical conductivity(EC) in the soil at the test plantation was low as much as 0.51 dS/m. The contents of organic matter(OM) and total nitrogen(TN) in the soil were 22.9 and 23.0 times lower than those of control. Average survival rate of 10 poplar clones showed 88% at three years after planting. Clones Eco28(Populus euramericana), Dorskamp(Populus deltoides ${\times}$ P. nigra) and I-476(Populus euramericana) showed the best survival rate of 100%. However, clones 97-19(Populus deltoides(Lux) ${\times}$ P. deltoides(Harvard)) and Suwon (Populus koreana ${\times}$ P. nigra var. italica) were relatively lower than other clones. Average height and DBH of all clones were 4.8 m and 3.6 cm, respectively. Clone Dorskamp showed the greatest height and DBH, 5.9 m and 5.0 cm, respectively. Clones 97-19 and Dorskamp showed the least defoliation by stress and visible damage by insects and diseases, whereas clones Suwon and I-476 were the most sensitive at the reclaimed tidal flat. Clone Dorskamp showed the best adaptability at the reclaimed tidal flat, but clone Suwon showed the worst based on survival rate, growth, and visible damages.

• Journal of The Korean Society of Grassland and Forage Science
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• v.30 no.2
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• pp.121-126
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• 2010

Until now, The experiment about the forage crop have been almost not conducted on the reclaimed land. Therefore, this experiment was carried out in order to know productivity of summer forage crop using slurry composting-biofilteration (SCB) liquid fertilizer on reclaimed land of Hwaong and Sukmoon in korea from 2008 to 2009. The forage crops used in this experiment were corn and sorghum${\times}$sorghum hybrid which are used as summer forage crops in South Korea. The experiment was treated with chemical fertilizer (CF), swine slurry (SS) and SCB liquid fertilizer. Dry matter (DM) yield of corn was higher than those of sorghum${\times}$sorghum hybrid in both reclaimed lands but the effect of SCB liquid fertilizer was not appeared. The neutral detergent fiber (NDF) and acid detergent fiber (ADF) contents of corn were lower than those of sorghum${\times}$sorghum hybrid. The crude protein (CP) content and in vitro dry matter digestibility (IVDMD) of corn were higher than those of sorghum${\times}$sorghum hybrid. In generally feed values of corn were higher than those of sorghum${\times}$sorghum hybrid. The results of this study showed that summer forage crop cultivation using uses SCB liquid fertilizer on reclaimed land are possible.

• Korean Journal of Microbiology
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• v.6 no.4
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• pp.131-140
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• 1968

The soil of the reclaimed tidal land, located in Chogi-ri, Is. Kanghwa, Korea was used in this experiment. The experimented soil samples were collected from 18 sites with its time elapsed after the shore-protection works, soil-depth and the vegetation of saline plants, and at each site samplings were conducted monthly from March through October, 1968, for the purposes of examining the changes of microbial populations for the microbes such as bacteria, actinomycetes and fungi, by using the dilution plate method. The numbers of the microbes in these soils generally showed lower levels comparing with those of other soils. The more time elapsed after the reclamation, the higher numbers of the microbes inhibited the soils. Higher populations were there in the surface soils than in the lower part of the area. The surface soils included comparatively better conditions in aeration and contents of organic matter than in the lower part, and this fact was. same as in general soils. However, not so was this in the case of March, April and October due to the higher soil temperatures in the lows. At the experimental sites where the halophytes such as Salicorniu were grown vigourously, the more densly the plants grew, the higher populations of actinomycetes and fungi were, but not in the case of bacterial population. This means, in this soil with dense Salicornia, it is difficult to obtain good-natured soils in short time without a higher population of bacteria. For the rapid utilization of the land soil, in this view of point, the methods increasing the number of bacteria in the soil are needed as well as the cultivation and harvesting Salicorniu which indicated in the privious paper(Hong, et al., 1969a). According to the results of this experiment, the changes of soil-microbial populations in the reclaimed tidal land soil containing high salinity depend deeply upon the interrelations of many environmental factors such as soil-salinity, soil-components and contents, concentration of organic matters, pH, aeration, and air and soil temperatures, as in the general soils.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.22 no.2
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• pp.37-41
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• 1977

Zeolite was applied of the tidal land and its effect on growth and yield of the two rice varieties, Yushin and Jinheung, was studied. The salinity of the zeolite treated soil was lower than that of the control. The effect of zeolite on growth of rice was appeared at the maximum tillering stage. The remarkable effect of zeolite on grain yield appeared in the variety Yushin, an indiea type. The amount of 600kg/10a was recognized to be an optimum amountd of the zeolite application in the tidal land.