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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
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Volume & Issues
Volume 1, Issue 2 - Dec 1982
Volume 1, Issue 1 - Jun 1982
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Levels of Organochlorine Pesticide Residues in the Cultivating Soils in the Suburbs of Gwangju - City, Jeollanam-Do
Suh, Yong-Tack ; Park, Ro-Dong ; Sim, Jae-Han ;
Korean Journal of Environmental Agriculture, volume 1, issue 2, 1982, Pages 83~88
Residues of some organochlorine pesticides
heptachlor, aldrin, heptachlor epoxide, dieldrin, p,p'-DDD, p,p'-DDT) in the cultivating soils (53 samples) were evaluated in the suburbs of Gwangju-City, Jeollanam-Do. Results obtained are summarized as follows. 1) Seven organochlorine pesticides were detected in more than 60% of the sample soils except dieldrin. In particular,
was detected in almost all soil samples and residue level of p,p'-DDT was higher than that of the others. 2) Detection frequencies and residue levels of up-land soil were higher than those of paddy soil. 3) There was no difference in the organochlorine residue levels between land-readjusted paddy soil and natural paddy
Persistence of Cyanofenphos on Chinese Cabbage
Lee, Hae-Keun ; Park, Young-Sun ; Hong, Jong-Uck ; Talekar, N.S. ;
Korean Journal of Environmental Agriculture, volume 1, issue 2, 1982, Pages 89~92
Persistence of cyanofenphos on Chinese cabbage under the different climate conditions was studied by spraying the insecticide at the rate of 0.5 and 0.75 ㎏ AI/ha at 22 and 36 days after transplanting and monitoring its residues upto 35 days after the final spray. At both spraying rates the degradation patterns of the insecticide, regardless of climate condition, showed similar trends; cyanofenphos residues on Chinese cabbage declined rapidly upto 14 days after the final spray but more slowly thereafter. Half-life for cyanofenphos on Chinese cabbage was
days. The half-life was little affected by the spraying rate and time. Based on the FAO/WHO maximum residue limit of cyanofenphos on common cabbage (2 ppm), it is recommended that the pre-harvest intervels of the insecticide on Chinese cabbage could be 16 and 19 days for 0.5 and 0.75 ㎏ AI/ha, respectively.
Persistence of IBP and Isoprothiolane in Rice Plant
Lee, Hae-Keun ; Jeong, Young-Ho ; Han, Ki-Hak ;
Korean Journal of Environmental Agriculture, volume 1, issue 2, 1982, Pages 93~98
Effect of the application time on the persistence of IBP and isoprothiolane in rice plant was studied in the field and effects of the water depth and soil texture on their persistence were also tested as a pot experiment. When granules were applied to the rice paddy water, two fungicides were readily absorbed through the root system and rapidly translocated to the upper parts of the plant. The concentrations of two fungicides in rice plant reached to the maximum within 24 hr regardless of the application time. When applied at the maximum tillering stage, the persistence pattern of two fungicides in plant showed similar trends; that is, residue levels of two compounds declined rapidly upto 7 days after application but more slowly thereafter. When applied at the heading stage, the persistence pattern of IBP in plant was similar to the maximum tillering stage while isoprothilane was quite different; 3 ppm reached on 3rd days after application was maintained almost constant for further 25 days. There was no effect of the water depth on the persistence of two compounds in plant and IBP concentration in plant was also not affected by soil texture. However, isoprothiolane in plant was higher in sandy loam than in loam and clay loam. Isoprothiolane residues in plant were much higher than those of IBP.
Studies on the Effect of Heptachlor Residues in Soil on the Growth of Hop ;I. Phytotoxic Symptom of Heptachlor Residues in Hop
Park, Kyeong-Yeol ; Lee, Dong-Woo ; Park, Chang-Kyu ; Han, Dae-Sung ;
Korean Journal of Environmental Agriculture, volume 1, issue 2, 1982, Pages 99~104
These studies were carried out to investigate the damage of root rot of hop by heptachlor residues in soil at nine farm fields and pot experiment for two years from 1980 to 1981. 1) Pot experiment results indicated that root rot of hop occurred in farm field were caused by heptachlor phytotoxicity. 2) The damage of root rot of the hop was found by heptachlor residues in soil. Hop root in the low concentration of heptachlor was turned to brown mottle, and then rotted. In high concentration, the hop root was decreased in number, blocked in growth, and resulted to greyish change with death. 3) Hop vine damaged by heptachlor was hardened and broken with ease. 4) Heptachlor epoxide which was inferred to be the main cause of hop root rot gave the damage to hop at 0.009 ppm reisdues in soil. 5) The phytotoxicity of heptachlor was proved to last for 10 years or more in this study.
Evaluation of Polychlorinated Biphenyls and Organochlorine Insecticide Residues in Waters, Sediments and Crucian Carps in Soho Lake
Park, Chang-Kyu ; Hwang, Eul-Chul ;
Korean Journal of Environmental Agriculture, volume 1, issue 2, 1982, Pages 105~115
Environmental samples contaminated with elemental sulfur(waters 22, sediments 20, crucian carps 19) collected from Soho Lake during the period of Sep. 1981 to Apr. 1982 were analyzed for polychlorinated biphenyls(PCBs) and organochlorine insecticides by GLC-ECD. Elemental sulfur was found to interfere in the residue analysis of environmental samples and the sulfur was eliminated, prior to analysis, with copper powder. PCBs residues in Soho lake were temporarily characterized as Aroclor 1254 and were analyzed at minimum detectable quantity of 0.04 ng by derivatizing PCBs to decachlorobiphenyl(DCB). PCBs were positively detected in all samples and its residue levels in waters, sediments, and crucian carps were
ppm and 0.091 ppm, respectively. The residue levels of PCBs in all samples but sediments at central and outlet site of the lake were higher than those of total p,p'-DDT. The residue levels of PCBs in waters varied with inlets, i.e. those at right inlet site were three times of those at left inlet site. The main source of PCBs residues in the environmental samples of Soho Lake was not evident by present work.
Studies on the Agricultural Pollutions in Gyeong Gi Area 1. Effect of Nitrogen Level and Soil Improvements on Growth and Yield of Rice in the Paddy Field Irrigated with Polluted Water of Hwangguji River
Choi, Y.J. ; Cho, G.D. ; Park, C.G. ; Park, J.K. ;
Korean Journal of Environmental Agriculture, volume 1, issue 2, 1982, Pages 116~122
Investigation on the water quality of Hwangguji River and experiment on the effects of nitrogen and soil improvements were carried out in the paddy field irrigated with polluted water of the river. The obtained results are as follows: 1) Amount of COD and
in water of the river were 54 ppm, 65 ppm, during the seeding time, and were 52 ppm, 512 ppm during the transplanting time respectively. Their concentrations were over the standard levels. It seemed that the water pollution was mainly caused by organic waste matters. 2) It seemed that the effective nitrogen level was
in the paddy field irrigated with polluted water of the river. 3) The rice yields of potassium twice quantity application plot with N.P.K. fertilizer, the calcium application plot with N.P.K. fertilizer and the combined plot with potassium, wallarstonite, calcium and fresh straw, were increased 4, 5 and 8%, respectively, than that of the N.P.K. fertilizer standard level plot.
Studies on the Effects of Ozone Gas in Paddy Rice;1. Effects of Ozone Gas on Growth Stage of Rice
Kim, Bok-Young ; Cho, Jae-Kyu ; Park, Young-Sun ;
Korean Journal of Environmental Agriculture, volume 1, issue 2, 1982, Pages 123~128
This study was carried out to investigate the effect of ozone gas on paddy rice at the different growth stage. Seokwang variety of rice plant was exposed to 0.5 ppm ozone gas for 4 hours at rooting, maximum tillering, ear formation and heading stages. after ozone gas fumigation, damage symptom, percentage of destroyed leaf, chlorophyll content and peroxidase activity of rice plant were observed. The results obtained are as follows. 1) Typical symptom of ozone gas damage appeared greyish or reddish brown subtle spots within rice leaf vein. 2) Yield loss by ozone gas exposure at different growth stage was in the order of maximum tillering stage>rooting stage>ear formation stage>heading stage. 3) Chlorophyll damage and leaf destruction was the highest at maximum tillering stage, while damage of leaf and chlorophyll were not found at heading stage. 4) The damage by ozone gas fumigation was higher at the growth stage with higher N content in plant, and N content was decreased after ozone gas exposure.
Studies on the Effects of Ozone Gas in Paddy Rice;II. Effect of Ozone Gas on Varieties of Rice
Kim, Bok-Young ; Kim, Sun-Kwan ; Kim, Bok-Jin ;
Korean Journal of Environmental Agriculture, volume 1, issue 2, 1982, Pages 129~133
This study was conducted to find out the resistance of rice varieties to ozone gas. Thirty eight rice varieties were exposed to 0.3 ppm
gas for 3 hours. Damage symptom, percentage of destroyed leaf and chlorophyll contents were observed after
fumigation. The results obtained are as follows. 1) Typical symptom of
damage appeared to greyish subtle spots in Japonica type and redish brown subtle spots in Indica-Japonica hybrid type within rice leaf vein. 2) Resistant varieties to
gas were Palgwangbyeo, Seokwangbyeo and Milyang 30, while sensitive ones were Gwanakbyeo, Jinjubyeo and Hankangchalbyeo. 3) Chlorophyll damage of rice leaves were higher in Nongbaeck, Dobongbyeo, Palgeum, Jinjubyeo than in Milyang 21, Podgwangbyeo, Josaeongtongil, Honamjosaeng, Hwanggeumbyeo. 4) The amount of chlorophyll damage showed highly significant positive correlation with that of leaf destruction.