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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Environmental Agriculture
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Journal DOI :
The Korean Society of Environmental Agriculture
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Volume & Issues
Volume 31, Issue 4 - Dec 2012
Volume 31, Issue 3 - Sep 2012
Volume 31, Issue 2 - Jun 2012
Volume 31, Issue 1 - Mar 2012
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Health Risk Assessment through Residents Exposure to Toxic Metals in Soil and Groundwater in the Vicinity of Sanyang Metal Mine
Park, Jeong-Hun ; Choi, Kyoung-Kyoon ;
Korean Journal of Environmental Agriculture, volume 31, issue 2, 2012, Pages 97~103
DOI : 10.5338/KJEA.2012.31.2.97
BACKGROUND: Metal mines were actively developed in the early twentieth century in Korea; however, most of these mines were closed and abandoned without proper management. Therefore, toxic metal contamination in the vicinity of Korean abandoned metal mines has been reported. A risk assessment for these metals was performed for residents near by abandoned Sanyang metal mine. METHODS AND RESULTS: Soil and groundwater samples were collected from May to October 2007 around the mine. After pretreatment of these samples, metal concentrations were measured and then a risk assessment was performed using the Korean soil-contamination risk assessment guidelines. Cancer risk was the highest from inhalation of Pb-contaminated soil, followed in descending order by As-contaminated soil inhalation and water ingestion. The sum of carcinogenic risks was
. The noncarcinogenic risk was observed for inhalation of Hg-contaminated soil (5.71). CONCLUSION: Inhalation of soil in dust was the principal pathway to cause the health risk and most of the risk was attributed to As, Pb,Cd, and Hg contamination.
Fertilizer and Organic Inputs Effects on CO
Emission from a Soil under Changing Water Regimes
Lim, Sang-Sun ; Choi, Woo-Jung ; Kim, Han-Yong ;
Korean Journal of Environmental Agriculture, volume 31, issue 2, 2012, Pages 104~112
DOI : 10.5338/KJEA.2012.31.2.104
BACKGROUND: Agricultural inputs (fertilizer and organic inputs) and water conditions can influence
emission from agricultural soils. This study was conducted to investigate the effects of agricultural inputs (fertilizer and organic inputs) under changing water regime on
emission from a soil in a laboratory incubation experiment. METHODS AND RESULTS: Four treatments were laid out: control without input and three type of agricultural inputs (
, AS; pig manure compost, PMC; hairy vetch, HV). Fertilizer and organic inputs were mixed with 25 g of soil at 2.75 mg N/25 g soil (equivalent to 110 kg N/ha) in a bottle with septum, and incubated for 60 days. During the first 30-days incubation, the soil was waterlogged (1 cm of water depth) by adding distilled water weekly, and on 30 days of incubation, excess water was discarded then incubated up to 60 days without addition of water. Based on the redox potential, water regime could be classified into wetting (1 to 30 days), transition (31 to 40 days), and drying periods (41 to 60 days). Across the entire period,
flux ranged from 0 to 13.8 mg
/m/day and from 0.4~1.9 g
/m/day, and both were relatively higher in the early wetting period and the boundary between transition and drying periods. During the entire period, % loss of C relative to the initial was highest in HV (16.4%) followed by AS (8.1%), PMC (7.5%), and control (5.4%), indicating readily decomposability of HV. Accordingly, both
fluxes were greatest in HV treatment. Meanwhile, the lower
flux in AS and PMC treatments than the control was ascribed to reduction in
generation due to the presence of oxidized compounds such as
that compete with precursors of
for electrons. CONCLUSION: Green manure such as HV can replace synthetic fertilizer in terms of N input, however, it may increase
emission from soils. Therefore, co-application of green manure and livestock manure compost needs to be considered in order to achieve satisfactory N supply and to mitigate
Estimation Suspended Solids Concentration of the Doam Reservoir under Dry and Wet Weather Conditions
Choi, Jae-Wan ; Shin, Dong-Seok ; Lim, Kyoung-Jae ; Lee, Sang-Soo ; Kang, Min-Ji ;
Korean Journal of Environmental Agriculture, volume 31, issue 2, 2012, Pages 113~121
DOI : 10.5338/KJEA.2012.31.2.113
BACKGROUND: The Doam watershed in Korea has been managed for the reduction and the prevention of non-point source pollution since 2007. Especially, the water quality of the Doam reservoir is a primary issue related to the Doam dam reoperation. We have carried out the modeling to evaluate the water quality based on suspended solids (SS) of the Doam watershed and the Doam reservoir. Two powerful hydrological and water quality models (HSPF and CE-QUAL-W2) were employed to simulate the combined processes of water quantity and quality both in the upland watershed of the Doam reservoir and the downstream waterbody. METHODS AND RESULTS: The HSPF model was calibrated and validated for streamflow and SS. The CE-QUAL-W2 was calibrated for water level, water temperature, and SS and was validated for the only water level owing to data lack. With the parameters obtained through the appropriate calibration, SS concentrations of inflow into and in the Doam reservoir were simulated for three years (2008, 2004 and 1998) of the minimum, the average, and the maximum of total annual precipitation during recent 30 years. The annual average SS concentrations of the inflow for 2008, 2004, and 1998 were 8.6, 10.9, and 18.4 mg/L, respectively and those in the Doam reservoir were 9.2, 13.8, and 21.5 mg/L. CONCLOUSION(s): The results showed that more intense and frequent precipitation would cause higher SS concentration and longer SS's retention in the reservoir. The HSPF and the CE-QUAL-W2 models could represent reasonably the SS from the Doam watershed and in the Doam reservoir.
Contamination Assessment of Water Quality and Stream Sediments Affected by Mine Drainage in the Sambo Mine Creek
Jung, Goo-Bok ; Kwon, Soon-Ik ; Hong, Sung-Chang ; Kim, Min-Kyeong ; Chae, Mi-Jin ; Kim, Won-Il ; Lee, Jong-Sik ; Kang, Kee-Kyung ;
Korean Journal of Environmental Agriculture, volume 31, issue 2, 2012, Pages 122~128
DOI : 10.5338/KJEA.2012.31.2.122
BACKGROUND: Mine drainage from metal mining districts is a well-recognized source of environmental contamination. Oxidation of metal sulfides in mines, mine dumps and tailing impoundments produces acidic, metal-rich waters that can contaminate the local surface water and soil. METHODS AND RESULTS: This experiment was carried out to investigate the pollution assessment of heavy metal on the water quality of mine drainage, paddy soils and sediment in lower watershed affected by mine drainage of the Sambo mine. The average concentrations of dissolved Cd (0.018~0.035 mg/L) in mine drainage discharged from the main waste rock dumps(WRD) was higher than the water quality standards (0.01 mg/L) for agricultural water in Korea. Also, the average concentrations of dissolved Zn, Fe and Mn were higher than those of recommended maximum concentrations (Zn 2.0, Fe 5.0, Mn 0.2 mg/L) of trace metal in irrigation water proposed by FAO (1994). The average contents of Pb and Zn in paddy soils was higher than those of standard level for soil contamination(Pb 200, Zn 300 mg/kg) in agricultural soil by Soil Environmental Conservation Act in Korea. Also, the concentrations of Cd, Pb and Zn in sediment were higher than those of standard level for soil contamination (Cd 10, Pb 400, Zn 600 mg/L) in waterway soil by Soil Environmental Conservation Act in Korea. The enrichment factor (EFc) of heavy metals in stream sediments were in the order as Cd>Pb>Zn> As>Cu>Cr>Ni. Also, the geoaccumulation index (Igeo) of heavy metals in stream sediments were in the order as Zn>Cd>Pb>Cu>As>Cr>Ni, specially, the geoaccumulation index (Igeo) of Zn (Igeo 3.1~6.2) were relatively higher than that of other metals in sediment. CONCLUSION(s): The results indicate that stream water and sediment were affected by mine drainage discharged from the Sambo mine at least to a distance of 1 km downstream (SN-1, SN-2) of the mine water discharge point.
Consequences of Water Induced Disasters to Livelihood Activities in Nepal
Gurung, Anup ; Karki, Arpana ; Karki, Rahul ; Bista, Rajesh ; Oh, Sang-Eun ;
Korean Journal of Environmental Agriculture, volume 31, issue 2, 2012, Pages 129~136
DOI : 10.5338/KJEA.2012.31.2.129
BACKGROUND: The changes in the climatic conditions have brought potentially significant new challenges, most critical are likely to be its impact on local livelihoods, agriculture, biodiversity and environments. Water induced disasters such as landslides, floods, erratic rain etc., are very common in developing countries which lead to changes in biological, geophysical and socioeconomic elements. The extent of damages caused by natural disasters is more sever in least developing countries. However, disasters affect women and men differently. In most of the cases women have to carry more burden as compared to their male counterpart during the period of disasters. METHODS AND RESULTS: This study examines the impact of disasters on the local livelihood especially agriculture and income generating activities of women in three districts of Nepal. The study uses the primary data collected following an exploratory approach, based on an intensive field study. The general findings of the study revealed that women had to experience hard time as compared to their male counterpart both during and after the disaster happen. Women are responsible for caring their children, collecting firewood, fetching water, collecting grass for livestock and performing household chores. Whereas, men are mainly involved in out-migration and remained out-side home most of the time. After the disaster occurred, most of the women had to struggle to support their lives as well as had to work longer hours than men during reconstruction period. Nepal follows patriarchal system and men can afford more leisure time as compared to women. During the disaster period, some of the households lost their agricultural lands, livestock and other properties. These losses created some additional workload to women respondent, however at the same time; they learn to build confidence, self-respect, self-esteem, and self-dependency.Although Nepal is predominantly agriculture, majority of the farmers are at subsistence level. In addition, men and women have different roles which differ with the variation in agro-production systems. Moreover women are extensively involved in agricultural activities though their importances were not recognized. Denial of land ownership and denial of access to resources as well as migration of male counterparts are some of the major reasons for affecting the agricultural environments for women in Nepal. CONCLUSION: The shelter reconstruction program has definitely brought positive change in women's access to decision making. The gradual increase in number of women respondent in access to decision making in different areas is a positive change and this has also provided them with a unique opportunity to change their gendered status in society.Furthermore, the exodus out-flow of male counterparts accelerated the additional burden and workload on women.
Comparison of Nutrient Balance in a Reclaimed Tidal Upland between Chemical and Compost Fertilization for the Winter Green Barley Cultivation
Song, In-Hong ; Lee, Kyong-Do ; Kim, Ji-Hye ; Kang, Moon-Seong ; Jang, Jeong-Ryeol ;
Korean Journal of Environmental Agriculture, volume 31, issue 2, 2012, Pages 137~145
DOI : 10.5338/KJEA.2012.31.2.137
BACKGROUND: Along with the surplus rice production, introduction of upland crop cultivations into newly reclaimed tidal areas has gained public attentions in terms of farming diversification and farmers income increase. However, its impacts on the surroundings have not been well studied yet, especially associated with nutrient balance from reclaimed upland cultivation. The objective of this study was to investigate water and nutrient balance during winter barley cultivation as affected different fertilization methods. METHODS AND RESULTS: TN and TP balance for three different plots treated by livestock compost, chemical fertilizer, and no application were monitored during winter green barley cultivation (2010-2011) at the NICS Kyehwa experimental field in Jeonbuk, Korea. Nutrient content in soil and pore water near soil surface appeared to increase, while sub-soil layer remained similar with no fertilization plot. Livestock compost application appeared to increase organic matter content in surface soil compared to chemical fertilization. Crop yield was the greatest with livestock compost application (10.6 t/ha) followed by chemical fertilization (6.9 t/ha) and no application (1.8 t/ha). The nitrogen uptake rate was also greater with livestock compost (52.4%) than chemical fertilizer (48.1%). Phosphorus uptake rate was much smaller (about 7.0%) compared to nitrogen. Nutrient loss by surface and subsurface runoff seemed to be minimal primarily due to small rainfall amount during the winter season. Most of the remaining nutrients, particularly phosphate seemed to be stored in soil layer. Phosphate accumulation appeared to be more phenomenal in the plot applied by livestock compost with higher phosphorus content. CONCLUSION: This study demonstrated that livestock compost application to tidal upland may increase barley crop production and also improve soil fertility by supplying organic content. However, excessive phosphorus supply with livestock compost seems likely to cause a phosphate accumulation problem, unless the nitrogen-based fertilization practice is adjusted.
Development of Analytical Method for Picoxystrobin in Agricultural Commodities Using GC/ECD and GC/MS
Kwon, Hye-Young ; Kim, Chan-Sup ; Park, Byung-Jun ; Kim, Il-Hwan ; Hong, Su-Myeong ; Son, Kyung-Ae ; Jin, Yong-Duk ; Lee, Je-Bong ; Im, Geon-Jae ; Kim, Doo-Ho ;
Korean Journal of Environmental Agriculture, volume 31, issue 2, 2012, Pages 146~151
DOI : 10.5338/KJEA.2012.31.2.146
BACKGROUND: This study was conducted to develop analytical method for picoxystrobin in agricultural commodities using GC/ECD and GC/MS. METHODS AND RESULTS: Each steps of analytical method were optimized for determining picoxystrobin residues in various agricultural commodities. The developed methods include acetone extraction, n-hexane/saline water partition and florisil column chromatography for analysis of all samples (apple, potato, green pepper, hulled rice and soybean), and in addition to these steps, solid phase extraction (SPE) was used for analysis of green pepper and n-hexane/acetonitrile partition was used for analysis of hulled rice and soybean. The instrumental conditions were tested for quantitation in GC/ECD and for confirmation in GC/MS. Recovery was in the range of 86~109% with RSD
10.2% and the quantitation limits (LOQ) of method were 0.025 mg/kg in all agricultural commodities. CONCLUSION: The result showed that the developed method can be used to determine picoxystrobin residue in agricultural commodities.
Residue Patterns of Insecticide Flubendiamide by Varieties of Peaches
Kim, Hyo-Young ; Hwang, Jeong-In ; Lee, Eun-Hyang ; Jeon, Young-Hwan ; Kim, Ji-Hwan ; Ahn, Ji-Woon ; Park, Hyun-Ju ; Chung, Chang-Kook ; Kim, San-Yeong ; Lee, Suk-Hee ; Kim, Jang-Eok ;
Korean Journal of Environmental Agriculture, volume 31, issue 2, 2012, Pages 152~156
DOI : 10.5338/KJEA.2012.31.2.152
BACKGROUND: This research has investigated the residue patterns of insecticide flubendiamide on three species of peaches with different surface forms, and the residue amounts of them when mixed with a spreader. METHODS AND RESULTS: Pesticide used for field application on peaches was 20% flubendiamide of suspension concentrate(SC) and was sprayed at a recommended rate. The residue amounts of flubendiamide in peach were analyzed by HPLC equipped with UV detector. After the observation with a microscope, the rank of fuzz amount on peach's surface was Kurakatawase, Wolmi in descending order and Cheonhong did not have any fuzz. The residue amounts of flubendiamide were 0.54 mg/kg for Kurakatawase, 0.43 mg/kg for Wolmi and 0.10 mg/kg for Cheonhong, respectively. When flubendiamide was used with a spreader, polyoxy ethylene methylpoly siloxane, the residue amount for Kurakatawase barely changed at 0.55 mg/kg regardless of mixing with a spreader, and at 0.53 mg/kg for Wolmi. In Cheonhong, the residue amount was 0.48 mg/kg, which increased by 4.8 times due to the use of a spreader. CONCLUSION: This result indicates that the residue amounts of flubendiamde were affected by the surface forms of peaches, and in the presence of a spreader the residue amount did not increase in fuzzy species, but was affected greatly for species without fuzz.
Development of Analytical Method for the Determination and Identification of Unregistered Pesticides in Domestic for Orange and Brown Rice(I) -Chlorthal-dimethyl, Clomeprop, Diflufenican, Hexachlorobenzene, Picolinafen, Propyzamide-
Chang, Hee-Ra ; Kang, Hae-Rim ; Kim, Jong-Hwan ; Do, Jung-A ; Oh, Jae-Ho ; Kwon, Ki-Sung ; Im, Moo-Hyeog ; Kim, Kyun ;
Korean Journal of Environmental Agriculture, volume 31, issue 2, 2012, Pages 157~163
DOI : 10.5338/KJEA.2012.31.2.157
BACKGROUND: For the safety of imported agricultural products, the study was conducted to develop the analytical method of unregistered pesticides in domestic. The analytical method of 6 pesticides, chlorthal-dimethyl, clomeprop, diflufenican, hexachlorobenzene, picolinafen, and propyzamide, for a fast multi-residue analysis were established for two different type crops, orange and brown rice by GC-ECD and confirmed by mass spectrometry. METHODS AND RESULTS: The analytical method was evaluated to limit of quantification, linearity and recoveries. The crop samples were extracted with acetonitrile and performed cleanup by liquid-liquid partition and Florisil SPE to remove co-extracted matrix. The extracted samples were analyzed by GC-ECD with good sensitivity and selectivity of the method. The limits of quantification (LOQ) range of the method with S/N ratio of 10 was 0.02~0.05 mg/kg for orange and brown rice. The linearity for targeted pesticides were
>0.999 at the levels ranged from 0.05 to 10.0 mg/kg. The average recoveries ranged from 74.4% to 110.3% with the percentage of coefficient variation in the range 0.2~8.8% at two different spiking levels (0.02 mg/kg and 0.2 mg/kg, 0.05 mg/kg and 0.5 mg/kg) in brown rice. And the average recoveries ranged from 77.8% to 118.4% with the percentage of coefficient variation in the range 0.2~6.6% at two different spiking levels (0.02 mg/kg and 0.2 mg/kg, 0.05 mg/kg and 0.5 mg/kg) in orange. Final determination was by gas chromatography/mass spectrometry/selected ion monitoring (GC/MS/SIM) to identify the targeted pesticides. CONCLUSION: As a result, this developed analytical method can be used as an official method for imported agricultural products.
Monitoring of Pesticide Residues and Risk Assessment for Fruit Vegetables and Root Vegetables of Environment-friendly Certified and General Agricultural Products
Ahn, Ji-Woon ; Jeon, Young-Hwan ; Hwang, Jeong-In ; Kim, Hyo-Young ; Kim, Ji-Hwan ; Chung, Duck-Hwa ; Kim, Jang-Eok ;
Korean Journal of Environmental Agriculture, volume 31, issue 2, 2012, Pages 164~169
DOI : 10.5338/KJEA.2012.31.2.164
BACKGROUND: This study was conducted to monitor the residue of pesticides and to assess their risk in domestic agricultural products, such as fruit vegetables, tomatoes, oriental melons and root vegetables, garlic, potatoes and onions. METHODS AND RESULTS: 250 samples containing both general and environment-friendly certified agricultural products were collected from traditional markets and supermarkets in 6 cities. 132 pesticides except for herbicides were analysed using the multi-residue methods by GC/ECD, GC/NPD and HPLC/UVD. 17 kinds of pesticides were detected from 42 samples, which were 32 general, 1 organic, 4 pesticide-free and 5 low pesticide agricultural products. Among those, myclobutanil detected in 1 potato and procymidone detected in 10 oriental melons were unregistered pesticides for using in Korea. Fenbuconazole detected in 1 potato and phorate detected in 1 tomato were exceeded over the MRLs established by Korea Food and Drug Administration. CONCLUSION: Based on these results, a risk assesment was conducted using a percentage of acceptable daily intake(%ADI). %ADI ranged from 0.0064% to 4.6035%, and showed these values have no effect on human health.
Assessment of Biological Toxicity Monitoring in Water Using Sulfur Oxidizing Bacteria
Kang, Woo-Chang ; Oh, Sang-Eun ;
Korean Journal of Environmental Agriculture, volume 31, issue 2, 2012, Pages 170~174
DOI : 10.5338/KJEA.2012.31.2.170
BACKGROUND: Inappropriate discharge of wastewaters and industrial effluents are becoming detrimental to the aquatic environment. The presence of toxic substances on wastewaters can be detected by physicochemical and biological methods. However, physicochemical methods do not give any information about biological toxicity. Therefore, in this study we tried to detect the presence of toxic substance on waters using sulfur-oxidizing bacteria (SOB) as a bioassay. MATERIALS AND RESULTS: The SOB biosensor was first stabilized using synthetic stream water and operated in both continuous and semi-continuous mode. When the SOB biosensor was operated in continuous mode, the effluent electrical conductivity (EC) stabilized at~1.72 dS/m. While in the case of semi-continuous, the EC stabilized at~0.6 dS/m. The SOB system was also operated at different reaction times to ascertain the shortest reaction time for monitoring the toxicity. Finally, the SOB biosensor was fed with nitrite as toxic substance. When 5 mg/L of nitrite was added to the SOB system, the EC decreased immediately. However, the EC recovered after few cycle. CONCLUSION: This study shows that the SOB biosensor can be used as warning system to protect aquatic environment from hazardous materials. Although SOB biosensor can not give specific information about the toxic substances, it can assess whether the water is toxic or not.
The Algicidal Activity of Pseudoalteromonas sp. NH-12 against the Toxic Dinoflagellate Alexandrium catenella
Jeoung, Nam-Ho ; Son, Hong-Joo ; Jeong, Seong-Yun ;
Korean Journal of Environmental Agriculture, volume 31, issue 2, 2012, Pages 175~184
DOI : 10.5338/KJEA.2012.31.2.175
BACKGROUND: The aim of this study was to isolate and identify algicidal bacterium that tends to kill the toxic dinoflagellate Alexandrium catenella, and to determine the algicidal activity. METHODS AND RESULTS: Among of four algicidal bacteria isolated in this study, NH-12 isolate was the strongest algicidal activity against A. catenella. NH-12 isolate was identified on the basis of biochemical characteristics and analysis of 16S rRNA gene sequences. The isolate showed 97.67% homology with Pseudoalteromonas prydzensis ACAM
(U85855), and was designated Pseudoalteromonas sp. NH-12. The optimal culture conditions of this isolate were
, initial pH 8.0, and 3.0% (w/v) NaCl concentration. The algicidal activity of NH-12 was significantly increased to maximum value in the late of logarithmic phase of bacterial culture. As a result of 'cell culture insert' experiment, NH-12 is assumed to produce secondary metabolites, as an indirect attacker. When 10% culture filtrate of NH-12 was applied to A. catenella, over 99% of algal cells were destroyed within 24 h. In addition, the killing effects were increased in dose and time dependent manners. CONCLUSION(S): Taken together, our results suggest that Pseudoalteromonas sp. NH-12 could be a candidate for controlling of toxic algal blooms.
Phosphorus Removal Characteristics by Bacteria Isolated from Industrial Wastewater
Kim, Hee-Jung ; Lee, Seok-Eon ; Hong, Hyeon-Ki ; Kim, Deok-Hyun ; An, Jung-Woo ; Choi, Jong-Soon ; Nam, Ju-Hyun ; Lee, Moon-Soon ; Woo, Sun-Hee ; Chung, Keun-Yook ;
Korean Journal of Environmental Agriculture, volume 31, issue 2, 2012, Pages 185~191
DOI : 10.5338/KJEA.2012.31.2.185
Background: The removal of phosphate(P) in the wastewater is essential for the prevention of eutrophication in the river and stream. This study was initiated to evaluate the P removal by three strains of bacteria isolated from industrial wastewater. The three strains of bacteria, A1, A2, and A3, isolated were identified as Stenotrophomonas maltophilia strain CUPS 3, Rhodococcus erythropolis strain Sco-C01, Bacillus sp. 3434BRRJ, respectively. METHODS AND RESULTS: The experiments evaluating the effects of temperature, P concentration, aeration, and carbon sources on P removal by Bacillus sp. 3434BRRJ were performed in the following conditions: temperature, 15, 25 and
; P concentrations, 20, 30, and 40 mg/L; oxygen condition, aerobic, anaerobic/aerobic conditions; carbon sources, glucose, acetate and mixture of glucose and acetate. As a result, the best optimum conditions for P removal by Bacillus sp. 3434BRRJ were as follows: temperature,
; P concentration, 20 mg/L; carbon sources, mixture of glucose and acetate; oxygen concentration, anaerobic and aerobic conditions. The P removal efficiencies by Bacillus sp. 3434BRRJ, Stenotrophomonas maltophilia strain CUPS, and Rhodococcus erythropolis strain Sco-C01 were 99%, 50%, 20%, respectively. CONCLUSION: As a result, the best optimum conditions for P removal by Bacillus sp. 3434BRRJ selected and used in this study were as follows: temperature,
; P concentration, 20 mg/L; carbon sources, mixture of glucose and acetate; oxygen concentration, anaerobic and aerobic conditions.
The Effects of Genetically Modified Crops on Soil Microbial Community
Lee, Ki-Jong ; Oh, Sung-Dug ; Sohn, Soo-In ; Ryu, Tae-Hun ; Park, Jong-Sug ; Lee, Jang-Yong ; Cho, Hyun-Suk ; Ahn, Byung-Ohg ;
Korean Journal of Environmental Agriculture, volume 31, issue 2, 2012, Pages 192~199
DOI : 10.5338/KJEA.2012.31.2.192
BACKGROUND: Genetically modified (GM) crops must receive relevant regulator's authorization before they can be sold as seed or used food, feed and processing. Before approving any GM crop, the relevant government ministries are required to examine environmental risk assessment to make scientifically sound and socially acceptable decisions. But one of the least studied and understood areas in the environmental risk assessment of GM crops are their impact on soil microbial community. METHODS AND RESULTS: Recently, advanced methods have been developed to characterize the soil microbial community in various environments. In this study, the culture-dependent and culture-independent technical approaches for profiling soil microbial communities are summarized and their applicability to assess GM crops are discussed. CONCLUSION(S): We concluded that the effect of GM crops on soil microbial community need to be assessed on a case by case basis. The combination of culture-dependent and culture-independent method was necessary for reliable and detailed assessment of effect of GM crops on soil microbial community.
Establishment of Watershed Management System for Efficient Water Management in the Yeongsan and Seomjin River Basin
Joung, Hee-Joung ; Jung, Jae-Woon ; Kim, Kap-Soon ; Park, Ha-Na ; Lim, Byung-Jin ; Huh, Yu-Jeong ; Lee, Jun-Bae ;
Korean Journal of Environmental Agriculture, volume 31, issue 2, 2012, Pages 200~204
DOI : 10.5338/KJEA.2012.31.2.200
BACKGROUND: Recently, the project for improvement of water quality and preservation of the Yeongsan and Seomjin river basin was actively promoted. However, the publicity for many results of the project is not actively done, thus they are rarely used. Furthermore, there are not sufficient information about the projects preformed by other research institutions. Therefore, the watershed management system for efficient water management is needed in the Yeongsan and Seomjin river basin. CONCLUSION: Firstly, establishment of the Yeongsan and Seomjin river basin management research center, Secondly, construciton of wed-based water management research network. These results will serve as a basic data for efficient water management.