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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Environmental Agriculture
Journal Basic Information
Journal DOI :
The Korean Society of Environmental Agriculture
Editor in Chief :
Volume & Issues
Volume 4, Issue 2 - Dec 1985
Volume 4, Issue 1 - Jun 1985
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Sequential Extraction of Cadmium, Zinc, Copper and Lead in Soils near Zinc-mining Sites
Yoo, Sun-Ho ; Kim, Kye-Hoon ; Hyun, Hae-Nam ;
Korean Journal of Environmental Agriculture, volume 4, issue 2, 1985, Pages 71~77
Soil samples collected from paddy field adjacent to zinc-mining sites were sequentially extracted to assess chemical fractions of Cd, Zn, Cu and Pb. The purpose of this study was two fold; (i) to examine the chemical forms of heavy metal in soils by sequential extraction. and (ii) to determine relationships between the chemical distribution of heavy metal in the soil and the heavy metal content of the brown rice. The results are summarized as follows. The content of exchangeable, organically bound and carbonate Cd and residual Zn was 73.9% and 63.8% of total Cd and Zn in the soil, respectively. The content of exchangeable Cd, Zn and Pb in soil showed highly negative correlations with pH, organically bound Cd, carbonate Cd, sulfide Cd, Zn and Pb in soil showed highly positive correlations with pH. The content of organically bound Cd, Zn, Pb and carbonate Cu in soil showed highly positive correlations with organic matter content, while the content of sulfide Cu and residual Cd in soil showed highly negative correlation with organic matter content. The content of carbonate Cd, Zn, Pb and residual Cu in soil showed highly positive correlations with CEC, but the content of exchangeable Cd, Zn, Cu, Pb and organically bound Cu in soil showed highly negative correlations with CEC. The content of total, organically bound, carbonate, sulfide and residual Cd in soil were highly correlated with that of Cd in brown rice. The content of any Pb fractions in soil were not correlated with that of Pb in brown rice. The content of water soluble and exchangeable Zn in soil were highly correlated with that of Zn in brown rice.
Effects of Paper Sludge Application on the Chemical Properties of Paddy Soil and Growth of Paddy Rice;I. Effects of Paper Sludge Application on the Nitrogen Forms and Inorganic Nutrients of Paddy Soil
Heo, Jong-Soo ; Kim, Kwang-Sik ;
Korean Journal of Environmental Agriculture, volume 4, issue 2, 1985, Pages 78~87
To investigate the effects of paper sludge, by-products of paper manufactory, on the chemical properties of paddy soil and growth of paddy rice, paper sludges were applied to the pots at the rates of 300, 600, 900 and 1,200㎏/l0a which were either pread-justed C/N ratio to 30 : 1 or not adjusted. The effects were compared with those of control. Seasonal variations of various forms of soil organic nitrogen, the mineralization of organic nitrogen and the contents of soil minerals were analyzed. The results were summarized as follows: 1) The contents of soil organic nitrogen, especially amino sugar-N and amino acid-N, organic matter, CEC and available
were increased by application of paper sludge compared with that of control. 2) The mineralizations of organic nitrogen after 6 weeks of incubation at
were 12. 2, 12.6, 15.1, 9.7 and
in the control, 300㎏/l0a sludge treatment, 300㎏/l0a sludge treatment(C/N ratio adjusted), 600㎏/l0a sludge treatment and 600㎏/l0a sludge treatment(C/N ratio adjusted), respectively. 3) Cu and Pb contents in the soil were in the range of
ppm, respectively. Cr and Cu in the soil were not detected at all. There were no differences in the contents of all the heavy metals among all the treatments in the soil.
A Survey on the Heavy Metal Concentration of Soil Samples around Onsan Industrial Complex
Lee, Su-Rae ; Song, Ki-Joon ;
Korean Journal of Environmental Agriculture, volume 4, issue 2, 1985, Pages 88~94
In order to investigate the pollution potential of soils after the construction of Onsan Industrial Complex(non-ferrous metal refineries), concentrations of hazardous heavy metals were analyzed for soil samples collected from paddy, upland, orchard and forest soils around the Complex during the period of March 1978 to May 1979. The results are summarized as follows. 1) The concentrations of heavy metals (air-dry basis) for cultivated soil samples from 46 sites were obtained in the range of trace-9.3 ppm As, trace-0.6 ppm Cd, 4
22 ppm Cu, trace-0.37 ppm Hg, 6
43 ppm Pb and 27
93 ppm Zn, which were regarded as non-polluted when compared with the whole Korea data for non-polluted paddy soils. 2) When the heavy metal concentrations were compared with respect to paddy, upland and orchard soils, no significant difference was observed in As, Cd, Cu and Zn whereas significant difference was observed in Hg and Pb. When they were compared with respect to region surrounding the Complex, no significant difference was observed in As, Cd, Hg whereas significant difference was observed in Cu and Pb. 3) Soil samples from several sites near Korea Zinc Refinery were contaminated with Cd, Pb and Zn, due to the accidental emission during its testing operation. Any further contamination was not observed after regular operation of the Refinery.
Evaluation of Polychlorinated Biphenyls(PCBs) and Organochlorine Insecticide Residues in Irrigation Waters in the Periphery of Suwon
Lee, Youn-Hyung ; Hwang, Eul-Chul ; Park, Chang-Kyu ;
Korean Journal of Environmental Agriculture, volume 4, issue 2, 1985, Pages 95~101
Water samples collected monthly between November 1982 and October 1983 from seven reserviors and a river in the periphery of Suwon, Korea were subjected to gas chromatographic analysis for PCBs and organochlorine insecticide residues. PCBs were positively detected in the most samples. The average residue levels of PCBs were found in the range of 0.009
0.5 ppb while those of organochlorine insecticides were in the range of "not detected"
0.008 ppb. The ratio of average residue levels of PCBs to those of total DDT was found to vary with sampling sites. The highest ratio of 500 was found in the water samples of Han River and the lowest in water of Won-chun Reservior. Both industrial and urban waste appear to be responsible for PCBs in the irrigation waters.
Effect of Water Management and Lime Application on the Growth and Copper Uptake of Paddy Rice
Kim, Kyu-Sik ; Kim, Bok-Young ; Lee, Min-Hyo ; Han, Ki-Hak ; Kim, Maun-Soo ;
Korean Journal of Environmental Agriculture, volume 4, issue 2, 1985, Pages 102~107
A pot experiment was conducted to find out the effects of water management, slaked lime and wollastonite on growth and Cu uptake of rice at Cu added soil. The soil was adjusted to 0, 50, 100 and 200 ppm concentration of Cu. The application amount of slaked lime was the lime requirement plus 150 ㎏/l0a and wollastonite 200 ㎏/10a, respectively. The copper concentration in soil which reduced yield significantly was 133.1 ppm for submersion and 136.8 ppm for intermittent irrigation. The application of lime and wollastonite reduced Cu content in brown rice as well as increased rice yields compared to that of no lime. The copper content in plant was increased with increasing soil Cu concentration, however, reduced with submersion and application of slaked lime, and increased with increasing the ratio of Cu/Ca+Mg equivalent in soil.
Aerial Application Tests with Some Low toxicity Insecticides Against the Fall Webworm, Hyphantria cunea Drury (Lepidoptera: Arctiidae)
Chung, Sang-Bai ; Ko, Je-Ho ;
Korean Journal of Environmental Agriculture, volume 4, issue 2, 1985, Pages 108~113
Aerial application tests with a biological insecticide (Thuricide
) and two low toxicity insecticides, Diflubenzuron (Dimilin
) and Triflumuron (Alsystin
) were carried out against the fall webworm (Hyphantria cunea Drury). For experimental application by helicopter, dilutions of 30x and 45x Thuricide, 180x and 240x Alsystin, and 180x Dimilin were utilized. The solutions were applied at a rate of 30 liters per hectare. The results are as follows: 1) All treatments, Dimilin 25% wp, Thuricide wp, and Alsystin 25% wp, were found to very effec tive against fall webworm larvae. Percentages of mortality averaged between 93.9% and 97%. 2) No significant differences in percentages of larval kill were found between dilutions of Thuricide (30x and 45x) or Alsystin (180x and 240x). 3) Assessment of parasite densities in the treated areas 35 days after treatment indicated that percentages of reduction for all five species found, including Brachymeria lasus(Walker) (=obscurata [Walker]), were lower than for areas treated with the conventional insecticide Diplox
(trichlorfon) 25% wp. In particular, the percentage of reduction in Thuricide-treated areas was only 21% as compared with the untreated (control) areas. 4) Aerial applications of Dimilin were very effective and economical for control of the fall webworm by comparison with [aerial] applications of Thuricide.
A Micro-quantification of Abscisic Acid from Plant Tissue by Pentafluorobenzyl Esterification Using GLC
Jeong, Young-Ho ; Hong, Moo-Ki ; Song, Byung-Hun ;
Korean Journal of Environmental Agriculture, volume 4, issue 2, 1985, Pages 114~117
A new method for micro-quantification of abscisic acid from plant tissue is described. GLC-ECD method of abscisic acid pertafluorobenzyl ester synthesized by reaction of plant extract with pentafluorobenzyl bromide showed higher sensitivity than that of abscisic acid methyl ester, and the detection limit of abscisic acid by the described method was as low as 5 pg.
Subchronic Toxicity of Herbicide Butachlor in Fish , the Medaka (Oryzias latipes)
Shin, Chun-Chul ; Lee, Sung-Kyu ; Roh, Jung-Ku ;
Korean Journal of Environmental Agriculture, volume 4, issue 2, 1985, Pages 118~125
To establish an evaluation system of aquatic toxicity of chemicals at no-effect level, flow through and early life stage toxicity test were performed on a freshwater fish, the medaka (Oryzias latipes). The characteristics of medaka as a bioassay organism for the chronic toxicity test were discussed. Maximum acceptable toxicant concentration(MATC) of butachlor for the madaka in soft water was estimated using survival, growth, and reproduction as indicators of toxic effects. During a 3-month period, the fry of medaka were exposed to butachor concentrations ranging from 0.16 to 0.0l mg/liter and the DO concentration, temperature, and pH in the exposure chamber were measured to check the test condition. The highest concentration showed slight decrease of growth rate in medaka and reduced hatchability of spawning egg. Survival, growth, and reproductive success of adults in butachlor concentration of 0.04 and 0.01 mg/liter were not different from those of the control. The MATC was estimated to be between 0.04 and 0.16 mg/liter for medaka.
Pollution of Soils and Farm Products
Seo, Yoon-Sue ;
Korean Journal of Environmental Agriculture, volume 4, issue 2, 1985, Pages 126~138
Prediction and Control of Oil Erosion and Water Pollution in Agricultural Lands
Koh, Chae-Koon ;
Korean Journal of Environmental Agriculture, volume 4, issue 2, 1985, Pages 139~147