• Korean Journal of Weed Science
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• v.9 no.3
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• pp.250-261
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• 1989

This study was conducted to evaluate the effect of retardent Paclobutrazol on the seed quality factors such as oil content, protein content and fatty acid composition in peanut cv. Saeddle(early variety) and Napung(medium variety). The results are summarized as follows : Oil content of seed was appeared to increase when Paclobutrazol was applied and especially it was remarkably increased at 120 ppm-90 DAS both in varieties. Even though protein content showed a little increase at 120 ppm-70 DAS in early variety and 120 ppm -90 DAS in medium variety, however, it was decreased in most case. Saturated fatty acids such as palmitic and stearic acid was reduced by Paclobutrazol treatment but unsaturated fatty acids such as oleic, linoleic, eicosenoic and eicosadienoic acid was tended to increase in early variety while palmitic acid was increased in medium variety but linoleic acid reduced and no change was observed in oleic acid content.

• Korean Journal of Agricultural Science
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• v.39 no.4
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• pp.483-489
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• 2012

Preference of stink bugs to various leguminous seeds was evaluated by using VTS (Video Tracking System) in laboratory. Major soybean stink bugs such as bean bug, Riptortus pedestris (Fabricius), one-banded stink bug, Piezodorus hybneri (Gmelin), eastern green stink bug, Nezara antennata (Scott), and sole bug, Dolycoris baccarum (L.) were significantly most attracted to Cheongjakong, a soybean variety, baited fish-net trap, followed by soybean varieties Ilpumgeomjeongkong and Taekwangkong, a peanut variety Daekwangdangkong, a kidney bean variety Gangnangkong, and a adzuki bean variety Jungwonpat, respectively in a soybean field. VTS observation in laboratory showed that R. pedestris and D. baccarum had significantly higher frequency of visit on Cheongjakong, followed by Ilpumgeomjeongkong. However, P. hybneri, N. antennata and Halyomorpha halys (Stal) had significantly higher number of visits on Cheongjakong, Seonnogkong and Jinpumkong, followed by Ilpumgeomjeongkong. The sojourned time of stink bugs, however, was significantly longer on Cheongjakong regardless of species of the bugs. Accordingly, Cheongjakong was evaluated as the most preferred soybean seed by fish-net trap and VTS. Thus, VTS is found to be an effective means to evaluate the food preference of stink bugs.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.29 no.3
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• pp.291-297
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• 1984

The peanut, unlike other plants, has three distinct steps in the reproductive process. These are the flowers, the peg and the fruit. This research was designed in the field to determine the difference of fruiting habit for each of plant types of peanut (Arachis hypogaea L.) in peanut culture limiting region. Eight cultivars representing four plant types, i.e., Virginia, Spanish, Valencia and Shinpung types. Number of pegs per plant produced in order of Spanish, Valencia, Virginia, Shinpung, Virginia type. The Virginia small seed type produced the most pods per plant. The shinpung type showed more percentage of matured pod than other types and early pot-set habit. Distribution of mature pods for each of branch positions to total mature pods occupied 63% on two cotyledonary branchs, 34% on 3rd to 5th branchs, 3% on over 6th branchs. Shinpung type was considered more favorable plant type than other types for breeding of early maturing high yielding variety because of early pot-set and high percentage of mature pod.

• Korean Journal of Weed Science
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• v.8 no.1
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• pp.71-89
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• 1988

This study was conducted to evaluate the effect of a growth retardant, Paclobutrazol on the growth, yield and its components. and physiological traits in peanut cv. Saeddle (early variety) and Nampung (medium variety). The results are summarized as follows : Main stem and branch length of both varieties were remarkably retarded at early growth stage application, but the retardation effect was reduced at late growth stage application. Number of branches was increased remarkably by treating 60ppm at 20days after seedling (DAS) in early variety. Lodging ill medium variety was not observed through growth period when 120ppm of Paclobutrazol was applied while lodging was not appeared between 40 DAS and 80 DAS in early variety. The numbers of riped pods in early variety was increased when application of 120ppm at 40 DAS was made while it was increased as application of 120ppm at 90 DAS in the medium variety. Cercospora leaf spot was reduced by spraying at 40 or 50 DAS regardless of concentration and varieties. Chlorophyll content and photosynthetic activity increased when paclobutrazol was applied during 40-60 DAS in early variety while these were observed at 90 DAS in medium variety. Seed weight tended to increase as paclobutrazol application was delayed. The ratio of pods to seeds was higher at 60ppm-40 DAS in early variety while it was higher at 120ppm-90 DAS in medium variety.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.47 no.6
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• pp.437-442
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• 2002

To breed high quality and yield peanut variety according to select the short flowering duration, fifteen germplasms (1 virginia,7 spanish,6 valencia types and var, Daekwang) were investigated the flowering habit and agronomic characteristics from 1998 to 1999. Emergence date of the selected short flowering duration germplasms (SPFGs) was earlier 1-3 days and middle or small seed than that of var, Daekwang. Main stem length was longer 57cm but the number of branches, pods, 100-seed weight, and pod weight per plant was reduced 25%, 23%, 42%, 46%, respectively, in SPFCs comparing to var, Daekwang. The flowering date in SPFGs was similar but the flowering duration was earlier 5-16 days than that of var, Daekwang (52 days). Varieties that flowered shorter duration than 50 days were 18.8% among the SPFGs. The number of total flowers in SPFGs was fewer 50% than that of var, Daekwang. The rate of flowering inhibition were 50-52% than that of var Daekwang. The frequencies of flowering duration (under 50 days) were 7.7% in virginia, 46.2% in spanish, 53.9% in valencia. The effect of shading treatment on rate of flowering inhibition were 11%, but number of branches and pods were reduced by 27-31% in valencia type compared to non-shade. Correlation coefficient was significant positively ($r=0.9314^*$ virginia, $r=0.9551^*$ spanish, $r=0.9551^*$ valencia) between the air temperature and flower number, The frequency of peg and pod number on 1st to 2nd nodes in SPFGs were more 3-12%, 21-26% than that of var. Daekwang. The rate of mature pods at 80 days after flowering were higher 12-17% than that of var, Daekwang (68%). Correlation coefficient was high significant negatively between date of first flower and flowering date, the ratio of mature pod.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.37 no.4
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• pp.347-354
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• 1992

Late harvest in peanut has often resulted in reduced yield and dissipation of labor by virtue of increasing over-matured pods causing the pod shattering. Present study was conducted to obtain a basic information for deciding optimum harvest time of the peanut in Chungbuk province by examination of yield components at different harvest time of leading cultivars Saedl and Youngho cultivated with vinyl mulching or non-mulching conditions. Peg number and pod number were significantly increased by vinyl mulching and also significantly different by the harvest time. Pod number increased with the lapse of days after flowering was gradually decreased from 100 days after flowering in saedl and 110 days in Youngho. Number of seed-bearing pods and matured seed percent were significantly increased by vinyl mulching and had tendency to increase with the lapse of days after flowering. There was no significant difference in number of over-matured pods and pod shattering percent between vinyl mulching and non-mulching. They increased drastically in 110 days after flowering in Saedl, but in 120 days after flowering in Youngho, Increase in 100 seed weight by vinyl mulching was statistically nonsignificant in both varieties, however, total seed yield was significantly increased by vinyl mulching, showing maximum yield in 100 days after flowering in the variety Saedl and 110 days in Youngho, respectively, Seed yield was negatively correlated to peg number and positively correlated to pod number, seed-bearing pod number, pod shattering percent, matured seed percent and 100 seed weight, respectively.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• v.46 no.5
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• pp.43-50
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• 2014

The cultivation of agricultural crops results in the generation of agricultural byproducts. Researchers have reported that these materials can be useful in a variety of applications. However, over 50% of them are currently discarded because of the lack of specific technologies in industrial applications. Therefore, effective and specific applications must be developed in order to manufacture high-quality materials using discarded lignocellulosic resources. In this study, we determined the possibility of using kraft pulp from major agricultural byproducts as a raw material for the manufacture of paperboard. Rice husks, peanut husks, and garlic stems were obtained and used to prepare many kinds of kraft pulps by controlling the active alkali, sulfidity, reaction time, and liquor ratio. After the production of these kraft pulps, handsheets were manufactured by mixing them with KOCC. After preconditioning, the physical properties and strengths of the handsheets were measured according to the TAPPI test methods. The shapes, lengths, and widths of the pulp fibers varied according to the type of agricultural byproduct and the kraft pulping conditions. Rice husk and garlic stem pulps manufactured under mild pulping conditions resulted in handsheets of higher bulk than other pulps. Garlic stem pulps manufactured under mild pulping conditions were stronger than rice husk pulps and peanut husk pulps.

• Journal of the Korean Society of Food Science and Nutrition
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• v.22 no.3
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• pp.328-333
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• 1993

The effect of defatted and dehydrated beef muscle on the physical properties of thermoplastically extruded defatted soybean, cottonseed, peanut and sunflower seed flours were investigated. To minimize the adverse effect of meat fat and to increase the mixing efficiency of the meat with defatted oilseed flours at a given moisture level, beef muscle was extracted with chloroform-ethanol(2 : 1) at 2$0^{\circ}C$ and air dried. The variety of oilseed flours used had greater effects on color, expansion, bulk density, water absorption rate and textural strength of the extrudate than did the added level of defatted, dehydrated beef muscle (0 to 20% on a dry weight basis).

• Research in Plant Disease
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• v.20 no.3
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• pp.189-195
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• 2014

Genetic engineering is being used to enhance disease resistance and nutritional value of crops including rice plant. Considering the fast-growing agricultural biotechnology and rapidly increasing global area of transgenic crops, the risk evaluation on environment is necessary. In this study, we surveyed the difference of disease occurrence between transgenic rice variety, Iksan526 transformed with peanut stilbene synthase gene and non-transgenic rice varieties, Dongjin and Nampyeong in the field. Moreover, the possibility of gene transfer from transgenic rice to bacterial and fungal pathogens was investigated. The results of this study indicated that there was no significant difference in the occurrence and severity of the diseases between Iksan526 and Dongjin or Nampyeong. In addition, the results suggested that rice pathogen, such as Xanthomonas oryzae pv. oryzae, Rhizoctonia solani and Magnaporthe grisea did not take up stilbene synthase and bar genes under natural conditions. Moreover the transformed DNA was not transferred to the pathogens even in repetitive contacts.

• Journal of Drive and Control
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• v.20 no.4
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• pp.100-106
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• 2023

We developed a crawler-based driving platform that can perform harvesting, transportation, pest control, and rotary operation by equipping it with various implements, and analyzed its performance. This single platform was developed to perform as pepper harvester, peanut harvester, and transporter with a 46-kW engine. A simulation model was developed to study the specifications of the platform, and the accuracy was also analyzed. The absolute percentage error ranged from 0.2 to 5.9%, which made it possible to predict the platform performance using simulation model. In T-test, both torque and speed on field and asphalt showed a significant difference (1%). Driving torque required differed depending on the nature of the field, and the speeds also changed based on soil load. The developed platform has the advantage of being equipped with a variety of working tools, expected to be used to harvest root crops in the future.