• 한국작물학회지
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• 제45권6호
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• pp.361-365
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• 2000

20세기에 재배되었던 우리나라 벼 품종 중에서 육성년대별로 비교적 널리 보급되었던 15개 품종에 대하여 수량구성요소를 분석하고 수량의 연차간 안정성을 검정한 결과를 요약하면 다음과 같다. 1. 수량구성요소 가운데 연차간 변이가 가장 작은 품종은 주당수수에서 다산벼, 수당립수에서 조동지, 등숙비율에서 용문벼, 천립중에서 낙동벼, 수량에서 다산벼였다. 2. Stroike and Johnson의 모델을 이용한 분석결과 자포니카에서 일품벼, 화성벼, 동진벼 통일형에서 안다벼, 다산벼가 평균 이상의 연차간 안정성을 보였다. 3. Grafius의 모델을 이용한 분석에서 universal variety의 만족조건을 충족시키는 품종으로는 자포니카에서 일품벼, 동진벼, 화성벼, 낙동벼, 조동지 등이었고, 통일형에서 다산벼와 삼강벼 등이었다. 4. Finlay and Wilkinson의 모델을 이용하여 안정성을 검정한 결과 자포니카에서 다마금. 동진벼, 화성벼, 일품벼 통일형에서 다산벼와 용문벼가 연차간 환경변이에 대하여 적응성이 높았다. 5. 이상의 3가지 검정방법으로 연차간 수량과 안정성을 추정하여 볼 때 공시품종 중에 최근 육성 품종들이 높은 안정성과 수량성을 보이는 것으로 평가되었다.

• 드라이브 ㆍ 컨트롤
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• 제21권2호
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• pp.36-43
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• 2024

The yield is basic and necessary information in precision agriculture that reduces input resources and enhances productivity. Yield information is important because it can be used to set up farming plans and evaluate farming results. Yield monitoring systems are commercialized in the United States and Japan but not in Korea. Therefore, such a system must be developed. This study was conducted to develop a yield monitoring system that improved performance by correcting a previously developed flow sensor using a grain tank-weighing system. An impact-plated type flow sensor was installed in a grain tank where grains are placed, and grain tank-weighing sensors were installed under the grain tank to estimate the weight of the grain inside the tank. The grain flow rate and grain weight prediction models showed high correlations, with coefficient of determinations (R2) of 0.9979 and 0.9991, respectively. A main controller of the yield monitoring system that calculated the real-time yield using a sensor output value was also developed and installed in a combine harvester. Field tests of the combine harvester yield monitoring system were conducted in a rice paddy field. The developed yield monitoring system showed high accuracy with an error of 0.13%. Therefore, the newly developed yield monitoring system can be used to predict grain weight with high accuracy.

• Bulletin of the Korean Chemical Society
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• 제35권12호
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• pp.3618-3622
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• 2014

Simple and practical synthesis of natural benzofuran derivative eupomatenoid-6 via Horner-Emmons type condensation as the key step is described. The umpolung property of aldehyde derivative, ${\alpha}$-aminophosphonate was efficiently employed in this reaction. ${\alpha}$-Aminophosphonate of anisaldehyde subjected to Horner-Emmons type condensation with 5-bromo-2-methoxybenzaldehyde to yield the deoxybenzoin, which was further methylated and then underwent tandem demethylation-cyclodehydration to afford the benzofuran scaffold in excellent yield. Finally Suzuki coupling with propenyl boronic acid afforded eupomatenoid-6 with an overall yield of 56.8%.

• 조명전기설비학회논문지
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• 제25권5호
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• pp.104-109
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• 2011

In this paper, after an acceleration typed ion wind generator which could format strong electric field in air was manufactured and installed, the effects of the electrode configuration and distance of acceleration type ion wind generator with triangle structure on the ion wind generation characteristics were investigated. As a result, the ion wind generator with curvature multipoint electrode could generate higher ion wind velocity and ion wind generation yield than others with multipoint electrode, curvature line electrode, line electrode structure. The ion wind generator with curvature multipoint electrode showed a peak ion wind velocity of 1.33[m/s] at 19.0[kV] and a ion wind generation yield of 0.12[m/Ws] at 15.0[kV].

• 한국초지조사료학회지
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• 제15권4호
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• pp.279-284
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• 1995

The competition relationship between orchardgrass(Docflis glomerutu L. cv; Potomac) and red clover (Trifnlium prurense L. cv; Kenland) was investigated under the pure and mixed swards. Each species were grown in intra- and interspecific competition in pots and fields for 2-years. Intra- and interspecific competition were evaluated by calculating traditional methods; expected yield, relative yield total(RYT), aggressivity and compensation index(CI), and shoot and root dry matter production in the orchadgrass(ffi) pure, red clover(RC) pure and orchardgrdss(W)-red clover(RC) mixed sward. The results obtained were summarized as follows: Compared to OG and RC pure swards, the shoot and root dry maaer(DM) yield of OG-RC mixed sward were higher and more deeply rooted under the soil than those of OG and RC pure sward. Also, the number of tillen per plant of OG in the OG-RC mixed sward was less than that of OG pure sward, but that of RC in the OGRC mixed sward was more than that of RC pure sward. OG-RC mixed sward were evaluated as a productive sward type compared to OG and RC pure swards in that actual yield was higher than expect yield and that relative yield total(RYT), and compensation index(C1) were high. As mentioned above, compared to intraspecific competition as a OG and RC pure sward, interspecific competition as a OG-RC mixed sward was evaluated to productive type under the ffi and RC species utilization

• 한국작물학회지
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• 제46권1호
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• pp.64-67
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• 2001

Snap bean is a new corp in Korea but believed to have a great deal of potentials for both domestic and overseas markets. The present study was performed to obtain the basic information about growth- and quality-related characteristics and to determinate the optimum seeding date and harvesting time for snap bean. Pod yield was significantly affected by seeding date. The highest pod yield was obtained from March 20 for determinate type and April 4 for indeterminate one, respectively, with the range of 13.0-23.7 t/ha. The pod length of indeterminate type was over 13cm, and the pod length was over 5 grams. The pod width for tested varieties was less than 1.0cm. Considering the pod growth characters such as pod length, pod width, and pod weight, the optimum harvesting time for immature pods of snap bean was supposed to be from 15 to 20 days after flowering. The daily yield of snap bean was begun to sharply increase from 15 days after the first flowering and the maximum yield was recorded at 30 days after flowering. For the accumulated yield, nearly 90% of total yield was obtained in 42 days after flowering.

• 한국약용작물학회지
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• 제6권3호
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• pp.188-192
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• 1998

작약(芍藥)의 육종재료(育種材料)로 이용되는 유전질원(遺傳資源)의 수집(蒐集)과 활용시(活用時) 외관(外觀)의 형태적(形態的) 특성(特性)과 지하부(地下部) 약근수량(藥根收量)과의 상호(相互) 상관(相關)을 조사한 결과(結果)는 다음과 같다. 1. 약재용(藥材用)으로 수집(蒐集)된 74계통중(系統中) 홑꽃이 61%였으며 겹꽃은 39%로 홑꽃이 주를 이루었다. 2. 경장(經長)은 주로 $50{\sim}60cm$였으며 줄기직경은 $7{\sim}8mm$, 줄기수는 $5{\sim}10$개 범위에 분포가 가장 많았다. 3. 수집계통중(蒐集系統中) 내병성(耐病性)이 매우 강(强)한 계통은 3계통(系統)이었고, 주당(株當) 뿌리 수량이 90 이상(以上)인 화형은 홑꽃이 많았다. 4. 뿌리수량(收量)과의 상관(相關)은 홑꽃은 경장, 경수, 근장, 근직경, 근수, 겹꽃은 경장, 경수, 근직경, 근수와 각각 고도(高度)의 정상관(正相關)을 보였다. 5. 뿌리수량(收量)과 pareniflorin 성분함량(成分含量)과는 홑꽃에서 고도(高度)의 정상관(正相關)이었으나 겹꽃에서는 부(負)의 상관이 인정(認定)되었다.

• 한국초지조사료학회지
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• 제15권1호
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• pp.67-72
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• 1995

To select the highest yield soiling type forage, the yield performance of selected sorghum-sudangrass hybrids imported in 1992 have been evaluated at Chonnam region. The soiling type hybrids used in this experiment were TE-haygrazer, FP-5 Sudan, Sweet sioux V, and X -78050. Three different cuttings were done on July 6, August 6 and September 16 in 1992. This trial was arranged as a randomized complete block design with three replications under taken over a period 5 months from May to September in 1992. The results of this experiment were summarized as follows: The hybrids tested were not significantly different by plant height, leaf blade length, leaf blade width and stem diameter. In the first cutting, dry matter yield of FP-5 Sudan was the highest. In the second and third cutting, dry matter yield of Sweet sioux V was the highest among hybrids. The contents of crude protein, hemicellulose, relative feeding value(RFV), and amino acid were the highest by the first cutting, but NDF and ADF were shown the lowest.

• Asian-Australasian Journal of Animal Sciences
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• 제28권2호
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• pp.268-272
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• 2015

The current study was carried out to determine the influence of different resting surfaces and stall types on milk yield and animal health. Study was carried out in Bursa that is one of the most important cities of Turkey in terms of dairy production. Effects of resting surfaces and stall types on milk yield were found to be important. Also influence of different resting surfaces and stall types on lactation length was examined and found that rubber mats were different from the two other options. Relationships between different resting surfaces or stall types and health problems were examined and connection between stall type and repeat breeding (RB), dystocia, retained placenta and a connection between resting surface types and RB and clinical mastitis were found to be important. Considering their economic reflections, it can be said that results are quite important to the Turkish dairy industry.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 1994년도 추계학술대회 논문집
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• pp.25-32
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• 1994

In order to analyse stretching of perforated sheets for shadow masks by the finite element method for use with the associated flow rule, yield functions which can explain the yield stresses and the apparent plastic contraction ratios of the sheets have been obtained. Coefficients in the yield functions could be determined from the measured apparent plastic contraction ratios under uniaxial tension. Using this yield function and estimated coefficients, the stretching of hole-type and slot-type sheets has been analysed and compared with the experimental results. The calculated results were in good agreement with the experimental results.