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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Agricultural Science
Journal Basic Information
Journal DOI :
CNU Journal of Agricultural Science
Editor in Chief :
Volume & Issues
Volume 38, Issue 4 - Dec 2011
Volume 38, Issue 3 - Sep 2011
Volume 38, Issue 2 - Jun 2011
Volume 38, Issue 1 - Mar 2011
Selecting the target year
generating pad treatment on storage of grape berries
Lim, Byung-Seon ; Lee, Shin-Hee ; Hwang, Yong-Soo ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 607~612
The occurrence of grape berry shattering and decay is influenced by the pre- and/or postharvest infection of decay organisms and pest. Postharvest infection is associated with physical damage due to rough handling. To control quality loss during storage of table grapes, the effects of slow releasing
pad on storability of 'Rosario Bianco' (Vitis vinifera) and 'Campbell Early' (Vitis labruscana) grapes were examined, respectively. The
concentration in package of tables grapes reached to at about 40
after 40 days of treatment and remained more than 80 days above 15
. Decay was found in untreated 'Rosario Bianco' and 'Campbell Early' grapes at each for 44 and 85 days after storage, but not in
pad treated grapes. The storage potential of grape berries at
increased 2~3 times depending on cultivar by
pad treatment. The application of
pad is confirmed to be effective on the increase of market potential with minimizing quality loss such as berry shattering and decay.
Development of clubroot race4 resistant inbreds using conventional breeding and microspore culture method in Chinese cabbage
Park, Su-Hyoung ; Yoon, Moo-Kyoung ; Lim, Yong-Pyo ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 613~618
To develop clubroot resistant Chinese cabbage inbreds, IT 033820, a clubroot resistant turnip, was cross pollinated with a Chinese cabbage inbred of BP 079. From 2005, conventional breeding and microspore culture method performed using these F1 plants as parental materials. In 2007, conventional breeding method resulted in 21 F3 inbreds. After inoculation of clubroot race 4, one inbred showing 83% resistant was selected and registered as 'onkyo 20036ho' in 2008. From 2005, we scanned hybrid cultivars using micro spore culture and developed many doubled haploid (DH) lines in Chinese cabbage. Using Chinese cultivar of 'oong-baek 2ho' we developed 26 DH inbreds in 2007. After inoculation of clubroot race 4, one DH inbred showing 77% resistant and yellow inner leaf color was selected and registered as 'onkyo 20034'in 2008. We found conventional breeding method was effective using introduced germplasm showing low germination. However, when using hybrid cultivar as starting material, microspore culture method was powerful for developing various inbred in short time.
Estimating the heating value of major coniferous trees by moisture content
Hwang, Jin-Sung ; Oh, Jae-Heun ; Ji, Byoung-Yun ; Kim, Pan-Seog ; Lee, Joon-Woo ; Cha, Du-Song ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 619~624
The calorific value is the most significant factor in woody biomass utilization. We measured the calorific value by the wood parts (debarked parts and bark) and moisture content for 3 major tree species (Larix kaempferi, Pinus koraiensis, and Pinus rigida). Results showed that the calorific value decreased exponentially as the moisture content increased regardless of tree species and the wood parts. The bark had higher calorific values than woody parts (de-barked parts). In addition, Pinus koraiensis had the highest calorific values among 3 study species.
Free radical scavenging activity and protective effect from cellular oxidative stress of active compound from eggplant (Solanum melongena L.)
Kim, Hyun-Young ; Cho, Yun-Ju ; Yamabe, Noriko ; Cho, Eun-Ju ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 625~629
To investigate the protective effect of eggplant (Solanum melongena L.) and its active compound, delphinidin, we used in vitro and cellular system. The active fraction from eggplant, BuOH fraction, showed protective effect from hydrogen peroxide-induced oxidative stress in WI-38 fibroblast cells. It suggests that eggplant would have the protective activity from radical-induced oxidative damage and its BuOH fraction would play the crucial role with antioxidative activity. In addition, delphinidin, the active compound from eggplant, exerted the strong 1,1-diphenyl-2-picrylhydrazyl scavenging effect with
value of 6.59
. Furthermore, the cellular oxidative stress was induced by 2,2'-azobis (2-amidinopropane) dihydrochloride (AAPH) in LLC-
cells, while treatment of delphinidin atteunated AAPH-induced oxidative stress as dose-dependent manner. The present study suggests the antioxidative activity of eggplant and delphinidin against free radical-induced oxidative stress.
Growth responses of New Zealand Spinach [Tetragonia tetragonoides (Pall.) Kuntze] to different soil texture and salinity
Kim, Sung-Ki ; Kim, In-Kyung ; Lee, Geung-Joo ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 631~639
This research was conducted to investigate potential use of New Zealand spinach (Tetragonia tetragonoides) as a new vegetable crop which will be cultivating in salt-affected soils including reclaimed land. Traditionally New Zealand spinach has been studied to explore functional compound or salt removing potential. To cultivate the crop species in the salt-affected soil widely, it is essential to obtain salt and soil texture responses under the controlled environment. Fifty nine New Zealand spinach ecotypes native to Korean peninsula first collected over seashore areas, and primitive habitat soil environment was evaluated by analyzing soil chemical properties from 32 locations. Different textures of sandy, silt loam, and sandy loam soils were prepared from nearby sources of sea shore, upland and paddy soils, respectively. Target salinity levels of 16.0 dS/m, 27.5 dS/m, 39.9 dS/m, and 52.4 dS/m in electrical conductivity (ECw) were achieved by diluting of 25, 50, 75, 100% (v/v) sea water to tap water (control, 0.6 dS/m), respectively. Various measurements responding to soil texture and irrigation salinity included plant height, root length, fresh weight (FW), dry weight (DW), leaf parameters (leaf number, leaf length, leaf width), lateral branching, and inorganic ion content. was found to adapt to diverse habitats ranging various soil chemical properties including soil pH, organic matter, exchangeable bases, EC, and cation exchange capacity (CEC) in Korea. Responding to soil texture, New Zealand spinach grew better in silt loam and sandy loam soil than in sandy soil. Higher yield (FW and DW) seemed to be associated with branch number (r=0.99 and 0.99, respectively), followed by plant height (r=0.94 and 0.97, respectively) and leaf number (r=0.89 and 0.84, respectively). Plant height, FW, and DW of the New Zealand spinach accessions were decreased with increasing irrigation salinity, while root length was not significantly different compared to control. Based on previous report, more narrow spectrum of salinity range (up to 16 dS/m) needs to be further studied in order to obtain more accurate salinity responses of the plant. As expected, leaf Na content was increased significantly with increasing salinity, while K and Ca contents decreased. Growth responses to soil texture and irrigation salinity implied the potential use of New Zealand spinach as a leafy vegetable in salt-affected soil constructed with silt loam or sandy loam soils.
A study on vegetation and soil environmental characteristics of green roof in Daejeon Metropolitan City
Lee, Sang-Jin ; Park, Gwan-Soo ; Lee, Dong-Kun ; Jang, Seong-Wan ; Park, Beom-Hwan ; Lee, Hang-Goo ; Yun, Joon-Young ; Jang, Kwan-Woo ; Lee, Seung-Woo ; Lee, Ho-Young ; Kwon, Oh-Jung ; Lee, Sook-Mee ; Kil, Sung-Ho ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 641~649
This study was to analyze the soil environmental characteristics and vegetation status of green roof in Daejeon Metropolitan City. The investigated floras of vascular plants are 17 families, 26 genera, 28 species in Seo-Gu Daejeon District Office Building (SG), 25 families, 49 genera, 56 species in Galma Public Library (GP), and 34 families, 57 genera, 60 species in Daejeon City Hall (DC) respectively. Although the larger area shows the more numbers of species in introduced plants and naturalized plant, the naturalized plant ratios were similar with each other. They were 10.71%, 10.71%, and 11.67% at SG, GP, and DC respectively. As a result of analysis on soil physical property, soil depths including vegetation soil and drainage soil of 3 green roofs were 30cm. The depths of vegetation soil at SG, GP, and DC were 0~8cm, 0~10cm, 0~10cm respectively. As a results of soil chemical properties of our study, soil pH of vegetation soil and drainage soil were a range of 6.42 and 7.43, and a range of 6.55 and 7.43 on the average respectively. Available-P contents of vegetation soil and drainage soil were a range of 153.33 and 366.33mg/kg, and a range of 136.67 and 242.67 mg/kg which is very high, respectively. Carbon contents in soil at vegetation soil and drainage soil were a range of 3.16 and 6.38%, and a range of 1.63 and 2.47% respectively. Carbon storage per square meter within 30 cm were 2.76 kg, 2.99 kg, and 3.66 kg at SG, GP, and DC respectively.
Effects of dietary protein of hog hair on the nutrients metabolism in poultry
Oh, Hyun-Min ; Park, Noh-Sung ; Jo, Chi-Hyun ; Kim, Sung-Bok ; Lim, Jae-Sam ; Lee, Bong-Duk ; Lee, Soo-Kee ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 651~657
Two experiments were conducted to investigate the effect of feeding hog hair protein (HHP) on the nutritional value for poultry. In experiment 1, twenty roosters of Hanhyup-3 strain were alloted, and metabolizability of HHAA was measured. In experiment 2, forty roosters of Hanhyup-3 strain were alloted to 0, 3, 7.6 and 15.1% of HHAA treatments, 10 birds per treatment, and measured feed utilization and blood parameters. In experiment 1, no trend was found in excretion of amino acid, high in glysine and glutelin, low in valine, threonine, and methionine. HHAA metabolizability of serine, phenylalanine, alanine, and isoleucine was more higher than that of lysine, cystine, asparagine, and tyrosine. In experiment 2, as the HHAA level increased, feed intake decreased significantly in 15.1% treatment, but water intake increased significantly in 15.1% traetment. Dry matter and nitrogen metabolizability decreased in 7.6 and 15.1% treatments. Although no significant difference was found among three treatments(0, 3, and 5.7%), as the HHAA level increased, dry matter and nitrogen metabolizability decreased. Serum creatinine level was significantly increased in 15.1% treatment. In conclusion, it is considered that proper level to substitute soybean meal by HHAA was 10%.
Growing performance of two pure-line Korean native ducks at growing phase
Kim, Hak-Kyu ; Hong, Eui-Chul ; Kang, Bo-Seok ; Heo, Kang-Nyeong ; Choo, Hyo-Jun ; HwangBo, Jong ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 659~665
This work was conducted to evaluate the hatching and growing performance of Korean Native Ducks (KND) Pure Breeding Line (PL). A total of 400 male and female pullets were produced from PL to keep in National Institute of Animal Science, Korea. Pullets were divided into 4 treatments, 5 repetitions per treatment, and 20 heads per repetition. Four treatments were compared in a
factorial arrangement with 2 groups (White strains, WW; Jade Green strains, CC) for their parents and 2 groups (male and female). Livability was not significantly different at 20 weeks among male and female of 2 strains. There was no significant difference on body weight and feed intake between WW and CC strains (P>0.05), but there was significantly different on body weight and feed intake between male and female (P<0.05). The feed conversion ratio of female was higher compared to male (P<0.05), but there was no significantly different between CC and WW strains. These results provide the basic data to develope the new strains of Korean Native Ducks.
Effect of bovine recombinant somatotropin protein on milk yield in Hanwoo
Woo, Jae-Seok ; Lee, Seung-Hwan ; Lee, Myeung-Sik ; Park, Jung-Yong ; Kim, Min-Kyu ; Hong, Sung-Goo ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 667~672
This study was carried out to increase the breeding rate using sustained recombinant bovine somatotropin (bST) and examine the reproductive disorder and disease prevalencies of cow and calf, respectively. Sixty cows were allotted randomly to three groups in randomized complete block design; (1) No treatment, (2) 500 mg bST two times + 250 mg bST SC injection five times from 3 weeks before to 9 weeks after parturition every two weeks, (3) 500 mg bST two times before 3 weeks parturition + 250 mg bST SC injection three times from five to 9 weeks after parturition every two weeks. Developmental data of birth weight, weaning weight, total gain and average daily gain in control was
kg, respectively. There is no significant difference between Group 1 and 3 in the examined factors. However, there is significant difference between Group 1 and 2 in the birth weight (
kg), weaning weight (
kg), total gain (
kg) and average daily gain (
kg). Total gain was showed higher in Group 2 and 3 than Group 1 in the >2nd parity, and in Group 2 than Group 1 and 3 in the 1st parity. There is no significant difference in the BCS, no return days and disease occurrence of cow and calf by bST treatment. Number of service per conception was slightly increased in the Group 3 compared to Group 1 and 2. To increase the breeding ability of Hanwoo, it is recommended that 500 mg bST two times + 250 mg bST injection five times from 3 weeks before to 9 weeks after parturition every two weeks.
Genetic polymorphism in regulatory region of fatty acid binding protein 4 (FABP4) and its effect on carcass weight in Hanwoo steers
Lee, Seung-Hwan ; Kim, Nam-Kuk ; Kim, Seung-Chang ; Choi, Bong-Hwan ; Heo, Kang-Neung ; Lee, Chang-Soo ; Kim, Oun-Hyun ; Lee, Jun-Heon ; Kim, Hyeong-Cheul ; Hong, Seong-Koo ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 673~680
The aim of this study was to identify the polymorphism on fatty acid binding protein (FABP4) gene promoter region and its association with carcass traits in Hanwoo. We performed PCR-direct sequencing of FABP4 promoter region to identify single nucleotide polymorphism (SNPs) using unrelated 24 Hanwoo bulls. Four SNPs (-298A>G, -472A>G, -887A>G, -862A>G) were detected in the promoter region and genotyped on 583 Hanwoo steers. A linear mixed model revealed an association of three SNPs (-298A>G, -472A>G and -862A>G) with carcass weight and marbling score in dominance model (P<0.05). The animals with AA genotypes for the three SNPs were heavier carcass weight (5 kg) than animals with GG genotypes in the statistical analysis. For the marbling score, the AA genotype was lower effect of marbling score (0.21) than GG genotypes. In conclusion, this study indicates an important role for three SNPs detected in promoter region of FABP4 in determining carcass weight and marbling score in Hanwoo.
Effect of new born piglet survival rate by growth in uterus during end of pregnancy and cesarean section time of fetus in specific pathogen free transgenic cloned mini pig
Woo, Jae-Seok ; Hwang, Seong-Soo ; Oh, Keon-Bong ; Lee, Hwi-Cheul ; Yang, Byoung-Chul ; Im, Gi-Sun ; Lee, Myeung-Sik ; Kim, Min-Kyu ; Nho, Whan-Gook ; Park, Soo-Bong ; Hong, Sung-Goo ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 681~687
Bioorgan transgenic cloned mini pig has a problem of growth retardation in uterus during end of pregnancy so that survival rate is very low in newborn piglet. In order to support their life after birth, cesarean section of fetus with sufficient growth in uterus was tested in this study. First of all, fetus growth measured using a ultrasound scanner during pregnancy in transgenic mini pig, comparing normal pig. After 113 days for delivering, fetus was removed out of uterus. Fetus growth for normal pig was 1.8 cm at 4weeks and 14.4 cm at end of pregnancy (15 weeks). At 113 days, fetus growth was
cm in ultrasound scanner and real growth measurement from fetus removal out of uterus was
cm. It is very a similar result between measurement of ultrasound scanner and real measurement. Therefore, using ultrasound scanner for measuring fetus growth will be useful to predict fetus growth in uterus.
Effect of the single nucleotide polymorphism from cytochrome P450 (CYP2A6) gene to fatty acid composition traits in Korean native pig crossed progeny
Roh, Jung-Gun ; Kim, Sang-Wook ; Kim, Kwan-Suk ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 689~693
The purpose of this study was to investigate the Cytochrome P450 (CYP2A6) gene as a candidate gene for the traits related with meat fatty acid composition traits in pigs. Porcine CYP2A6 polymorphisms were detected and PCR-RFLP was performed for genotyping of Korean native pig (n=14), Landrace (n=3), Duroc (n=3), Berkshire (n=3), Yorkshire (n=8) and F2 population composed of 202 individuals from an intercross between Korean Native pig and Yorkshire. PCR primer set amplified a 612 bp fragment of CYP2A6 and digestion of the PCR products was performed with the restriction enzymes SchI. The CYP2A6 SchI polymorphism was only found in the KNP breed. The genotype frequencies of TT, TC and CC genotypes were 0.36, 0.56 and 0.08 in the KNP respectively and the other pig breeds were fixed with CC genotype (Duroc, Landrace, Berkshire and Yorkshire). Statistical association between genotypes and fatty acid composition traits were tested in the Korean native pig and Yorkshire crossed F2 pigs. The CYP2A6 SchI polymorphism was associated with only fatty acid composition C20:3n3 level (cis11,14,17-Eicosatrienoic acid, p=0.0252). The 'T' allele was associated with lower C20:3n3 level. Further study is required to validate the genotypic association and biological consequence of the CYP2A6 gene polymorphism in pigs.
Effect of lighting regimes on amino acid and fatty acid contents of broiler chicken meat
Na, Jae-Cheon ; Park, Sung-Bok ; Kang, Hwan-Ku ; Kim, Dong-Wook ; Kim, Min-Ji ; Bang, Han-Tae ; Chae, Hyun-Seok ; Choi, Hee-Chul ; Suh, Ok-Suk ; Hong, Eui-Chul ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 695~701
The study was carried out to investigate the effect of lighting regimes on performance and meat quality of broiler. A total of 912 chicks was divided into 2 groups with male (3 replications/group, 34 heads/replication) and female (3 replications/group, 42 heads/replication). Treatments were control (C, natural lighting), T1 treatment (24L), and T2 treatment (1~2d, 24L; 2~4d, 23L+1D; 4~16d, 16L+8D; 16~21d, 18L+6D; 21~42d, 23L+1D) by lighting regimes. Lysine content of male chicken meats at T2 treatment was lower compared to that of other treatments (p<0.05). There was no significant difference in all nonessential amino acid (AA) among treatments. Methionine content of female chicken meats at T2 treatment was lower compared to that of other treatments (p<0.05). The rate of C16:0, C16:1n7, and C18:1n9 of male chicken meat at T2 treatment was higher than that of other treatments (p<0.05), while C18:2n6 was lower at T2 treatment than other treatment (p<0.05). Mono-saturated fatty acid was the highest at T2 treatment, however, polysaturated fatty acid was the lowest at that treatment (p<0.05). There was no considerable difference in fatty acid composition of female chicken meat among treatments. Finally, lighting regime didn' affect on amino acid and fatty acid contents, and used possibly on energy reduction.
Effect of green manure barley and hairy vetch on soil characteristics and rice yield in paddy
Cho, Hyeoun-Suk ; Park, Woo-Young ; Jeon, Weon-Tai ; Seong, Ki-Yeung ; Kim, Chung-Guk ; Park, Tae-Seon ; Kim, Jae-Deok ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 703~709
This study was conducted at Korea's typical soil, loamy soil, to figure out the effect of how barley green manure (B), hairy vetch (HV) and the mixed-planting hairy vetch with barley green manure (HV/B) affecting on the yield of rice, usage of nutrient and soil characteristics. Supplying amount of nitrogen from HV, HV/B and B were 172.8 kg
, 64.3 kg
and 38.6 kg
, respectively. Hairy vetch had the highest plant height and SPAD of rice and next was hairy vetch/barley, chemical fertilizer (CF), none fertilizer (NF), and green manure barley. The amount of rice yield was 5.51 ton
with HV, and 4.24 ton
with HV/B. The chemical characteristics of soil showed lower pH and exchangeable cations (Ca and Mg) at B, HV and HV/B plot rather than that of chemical fertilizer (CF) plot. However, the physical characteristics of soil and the porosity rate showed better tendency at the green manure crops than CF. Nitrogen nutrient balance was showed the most balanced at CF, otherwise field of application of green manure crops were required the appropriate nutrition management if future crops would be cultivated because nitrogen nutrient could be devastated or accumulated.
Rennet-induced gels and their mechanical properties
Choi, Jong-Woo ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 711~716
Casein micelles are the basic building block of rennet-induced gels. The stiffness of these gels is increased with reaction time. This is probably due to the continuous participation of activated casein micelles into growing network. Dual binding model of casein micelles, which explains assembly of casein and colloidal calcium phosphate, can provides fairly reasonable explanation for the changes in mechanical properties of rennet-induced gels made from different milk pHs and varying colloidal calcium phosphates. The changes in stiffness of these gels would be used for controlling textural properties of cheeses.
Antioxidative effects of hesperidin and hesperetin under cellular system
Cho, Eun-Ju ; Li, Li ; Yamabe, Noriko ; Kim, Hyun-Young ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 717~722
In this study, we investigated the antioxidant activity of hesperidin and hesperetin, which are the active compounds from Citrus junos, in the cellular system. Under cellular model of oxidative damage using LLC-
renal epithelial cell, the oxidative damage induced by 2,2'-azobis (2-amidinopropane) dihydrochloride (AAPH) led to the loss of cell viability, while treatment of hesperidin and hesperetin increased significantly the cell viability as dose-dependent manner. In addition, NO-induced cellular oxidative damage by sodium nitroprusside were significantly recovered by the treatment of hesperidin and hesperetin, showing the increase of cell viability. But hesperidin and hesperetin showed no significant protective effect on
-induced cellular oxidative damage. The present study indicates that hesperidin and hesperetin protect against free radical, especially AAPH-induced peroxyl radical. In particular, hesperetin has stronger protective effect against oxidative stress than hesperidin.
GC/MS analysis of volatile constituents from woody plants
Lee, Dong-Gu ; Choi, Kyung ; Lee, Sang-Hyun ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 723~730
To search for the new development of industrial application of woody plants, the chemical composition of the volatile constituents from woody plants (Evodia daniellii, Clerodendron trichotomum, Prunus padus, and Zanthoxylum ailanthoides) was determined by GC and GC/MS spectrometric analysis with the aid of NBS, Wiley Library and RI indice searches. The major constituents were t-ocimene from the leaves of E. daniellii, linalool from the leaves of C. trichotomum, benzaldehyde from the leaves and twigs of P. padus,
-thujene from the leaves of Z. ailanthoides, and 2-undecanone from the stems of Z. ailanthoides. These results suggested that the major volatile constituents of woody plants could be a useful lead compound in the development of functional materials for industrial application.
Analysis of learning effects using audio-visual manual of SWAT
Lee, Ju-Yeong ; Kim, Tea-Ho ; Ryu, Ji-Chul ; Kang, Hyun-Woo ; Kum, Dong-Hyuk ; Woo, Won-Hee ; Jang, Chun-Hwa ; Choi, Jong-Dae ; Lim, Kyoung-Jae ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 731~737
In the modern society, GIS-based decision support system has been used in evaluating environmental issues and changes due to spatial and temporal analysis capabilities of the GIS. However without proper manual of these systems, its desired goals could not be achieved. In this study, audio-visual SWAT tutorial system was developed to evaluate its effectives in learning the SWAT model. Learning effects was analyzed after in-class demonstration and survey. The survey was conducted for
grade students with/without audio-visual materials using 30 questionnaires, composed of 3 items for trend of respondent, 5 items for effects of audio-visual materials, and 12 items for effects of with/without manual in learning the model. For group without audio-visual manual, 2.98 out of 5 was obtained and 4.05 out of 5 was obtained for group with audio-visual manual, indicating higher content delivery with audio-visual learning effects. As shown in this study, the audio-visual learning material should be developed and used in various computer-based modeling system.
Analysis of soil loss on sloping land considering daily rainfall
Kim, Won-Jun ; Park, Bum-Soo ; Lee, Jae-Hyeok ; Ryu, Ji-Chul ; Jang, Chun-Hwa ; Kim, Young-Sug ; Park, Hwa-Yong ; Lim, Kyoung-Jae ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 739~745
The MUSLE was utilized in this study to estimate soil erosion using daily precipitation which was main influential factor in soil loss estimation. Various scenarios were simulated to evaluate how transition of slope, agricultural products and precipitation could affect soil loss in the field. It was found that slope was the most affecting factor in soil loss estimation. Especially 1.8 times the soil loss was expected with potato at 45% slope compared with codonopsis at same slope with MUSLE model. Fortunately, farmers had planted codonopsis at this slope to reduce soil erosion from this steep slope. As shown in this study, the MUSLE method could be utilized to determine optimum crop type for each field with various slope conditions to minimize soil erosion. This approach utilized in this study could be applied to other agricultural watersheds to evaluate various soil erosion conditions.
Evaluation of wireless communication devices for remote monitoring of protected crop production environment
Hur, Seung-Oh ; Ryu, Myong-Jin ; Ryu, Dong-Ki ; Chung, Sun-Ok ; Huh, Yun-Kun ; Choi, Jin-Yong ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 747~752
Wireless technology has enabled farmers monitor and control protected production environment more efficiently. Utilization of USN (Ubiquitous Sensor Network) devices also brought benefits due to reduced wiring and central data handling requirements. However, wireless communication loses signal under unfavorable conditions (e.g., blocked signal path, low signal intensity). In this paper, performance of commercial wireless communication devices were evaluated for application to protected crop production. Two different models of wireless communication devices were tested. Sensors used in the study were weather units installed outside and top of a greenhouse (wind velocity and direction, precipitation, temperature and humidity), inside ambient condition units (temperature, humidity,
, and light intensity), and irrigation status units (irrigation flow and pressure, and soil water content). Performance of wireless communication was evaluated with and without crop. For a 2.4 GHz device, communication distance was decreased by about 10% when crops were present between the transmitting and receiving antennas installed on the ground, and the best performance was obtained when the antennas were installed 2 m above the crop canopy. When tested in a greenhouse, center of a greenhouse was chosen as the location of receiving antenna. The results would provide information useful for implementation of wireless environment monitoring system for protected crop production using USN devices.
Application of smartphone and wi-fi communication for remote monitoring and control of protected crop production environment
Hur, Seung-Oh ; Han, Kyeong-Hwa ; Jeon, Sang-Ho ; Jang, Yong-Sun ; Kang, Sin-Woo ; Chung, Sun-Ok ; Kim, Hak-Jin ; Lee, Kyeong-Hwan ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 753~759
Protected crop production has been popular in Korea as well as in other countries. Intensive and continuous monitoring and control of the environment, which is labor- and time-consuming, is critical for stable crop productivity and profitability, otherwise damage could be happened due to unfavorable ambient and soil conditions. In the study, potential utilization of smartphone and remote access application in protected crop production environment was investigated. Tested available remote access applications provided functions of mouse click (left and right buttons), zooming in and out, and screen size and color resolution control. Wi-Fi data communication speeds were affected by signal intensity and user place. Data speeds at high (> -55 dBm), medium (-70~-56 dBm), and low (< -71 dBm) signal intensity levels were statistically different (
). Means of data communication speed were 6.642, 4.923, and 2.906 Mbps at hot spot, home, and office, respectively, and the differences were significant at a 0.05 level. Smart phone and remote access application were applied successfully to remote monitoring (inside temperature and humidity, and outside precipitation, temperature, and humidity) and control (window and light on/off) of green house environment. Response times for monitoring and control were less than 1 s at all places for high signal intensity (> -55 dBm), but they were increased to 1 ~ 10 s at home and office and to 10 ~ 30 s at hot spot for low signal intensity (< -71 dBm) for Wi-Fi. Results of the study would provide useful information for farmers to apply these techniques for their crop production.
Design and performance evaluation of portable electronic nose systems for freshness evaluation of meats II - Performance analysis of electronic nose systems by prediction of total bacteria count of pork meats
Kim, Jae-Gone ; Cho, Byoung-Kwan ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 761~767
The objective of this study was to predict total bacteria count of pork meats by using the portable electronic nose systems developed throughout two stages of the prototypes. Total bacteria counts were measured for pork meats stored at
for 21days and compared with the signals of the electronic nose systems. PLS(Partial least square), PCR (Principal component regression), MLR (Multiple linear regression) models were developed for the prediction of total bacteria count of pork meats. The coefficient of determination (
) and root mean square error of prediction (RMSEP) for the models were 0.789 and 0.784 log CFU/g with the 1st system for the pork loin, 0.796 and 0.597 log CFU/g with the 2nd system for the pork belly, and 0.661 and 0.576 log CFU/g with the 2nd system for the pork loin respectively. The results show that the developed electronic system has potential to predict total bacteria count of pork meats.
An analysis on enhancement of customer satisfaction for conversion farm with
Jang, Hyun-Dong ; Kim, Soung-Hun ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 769~774
This study aimed at finding the factors impacting customer satisfaction (CS) for conversion farm with
industry, because the most important thing in the conversion farm is enhancing customer satisfaction. The data on CS from 173 pumpkin farm's customers by on-line survey were gathered. The analysis using structural equation model with Amos was carried out. Product, service and purchasing were determined as 3 factors impacting to CS. The result showed that purchasing is the biggiest contributor to CS. It means the customers using on-ine market are very sensitive to farm's brand and logistics. It is also found that conversion with processing and farm experience activity is definitely affecting to building customer's trust. In conclusion, making efforts on enhancing CS in conversion farm is the key to success.
Hutan Kemasyarakatan (Community Forestry Programme) and REDD+
Yoon, Jun-Young ; Park, Gwan-Soo ; Kang, Ho-Duck ; Kim, Se-Bin ; Lee, Jun-Woo ; Sung, Yong-Joo ; Lee, Seung-Woo ; Lee, Sang-Jin ; Park, Beom-Hwan ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 775~783
The purpose of this study was to investigate if an community forestry programme (HKm) could be one of the main tool for REDD+ in Indonesia. Recently, considerable numbers of countries including Norway, England, Korea and etc. have invested 69 million US$ in total to Indonesia for implementation of REDD+. However, forest dependent people without a communal right are subject to poor forest governance during a stream of REDD+ in Indonesia. This study suggest that HKm are needed to be a tool for REDD+ in order to achieve the objects of REDD+ in terms of Equity, Efficiency, and Effectiveness (3Es) by stimulating local and Indigenous peoples to participate in REDD+. As a result of our study, Indonesia government have designated only 200,000 ha for HKm area by 2007. Indonesia government have a week political will to extend its area to give a communal right to those peoples who dwell in state forests and HKm application process is complicated and slow. HKm has a potential to be main tool for REDD+ in Indonesia. However HKm will be difficult to be main tool for REDD+ without resolving current obstacles.
The farm management analysis of the effect of yield increase and economic efficiency of cropping system on green manure crops - cabbage in the plastic house
Park, Sung-Yong ; Hwang, Kwang-Nam ; Cho, Hyeoun-Suk ; Ahn, Jong-Woong ; Lee, Yong-Hwan ; Park, Jeong-Hwa ; Park, Pyung-Sik ; Lim, Young-Taek ; Han, Hee-Suk ; Lee, Dong-Chul ; Yu, Hong-Seob ;
Korean Journal of Agricultural Science, volume 38, issue 4, 2011, Pages 785~791
This study was carried out to analyze the effect of the farm management and productivity increase of cabbages growing in the plastic house based on application of green manure crops such as silage corn, haussolgo (Sorghum bicolar L. Moench), hairy vetch, etc. According to the effect of green manure crop grown in summer season, the biomass amount of the silage corn was the highest; 7,630 kg per 10a, the next was haussolgo, 5,620 kg per 10a. In terms of the fertilizer ingredients, the first of forage soybean was 3.84% of nitrogen, whereas hairy vetch was 1.74% of phosphate and kalium, 4.74%. Productivity increase of cabbages was the highest in the haussolgo plot of which the yield of showed 10,090 kg per 10a and the farm household income would be worth 8,053 thousand won. By growing forage crops in the winter season, the biomass amount was the highest in the mixed sowing plot with rye (50%) and hairy vetch (50%) of 3,590 kg per 10a, whereas the productivity in the mixed seeding with rye (70%) and hairy vetch (30%) was highest, 6,249 kg per 10a and the farm household income would be worth 7,387 thousand won. Judging from these results, more practical on-farm research on applying different green manure crops as a basal fertilizer with cabbage in the plastic house should be considered to analyze the farm management and the farm household income at different sites.