• International Journal of Industrial Entomology and Biomaterials
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• v.23 no.1
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• pp.179-182
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• 2011

Normally the first generation of hybrid is supplied for farm rearing, precise and labor saving sex discrimination is needed. The new strain "Hansaengjam" is sex-limited (female:larval markings, male:no-markings) strain which was bred from both sex-limited strain Japanese originated Jam 153 and Chinese originated strain Jam 154. Productivity test of Hansaengjam during 2007 and 2009 showed high healthiness and cocoon yield. The Hansaengjam is evaluated as an excellent strain from healthiness, cocoon yield and other test results.

• Korean Journal of Soil Science and Fertilizer
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• v.47 no.2
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• pp.92-99
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• 2014

The crop growing conditions make accurate predictions of yield ahead of harvest time difficult. Such predictions are needed by the government to estimate, ahead of time, the amount of crop required to be imported to meet the expected domestic shortfall. Corn and soybean especially are widely cultivated throughout the world and a staple food in many regions of the world. On the other hand, the CASA (Carnegie-Ames-Stanford Approach) model is a process-based model to estimate the land plant NPP (Net Primary Productivity) based on the plant growing mechanism. In this paper, therefore, a methodology for the estimation of corn/soybean yield ahead of harvest time is developed specifically for the growing conditions particular to Iowa and Illinois. The method is based on CASA model using MODIS data, and uses Net Primary Productivity (NPP) to predict corn/soybean yield. As a result, NPP at DOY 217 (in Illinois) and DOY 241 (in Iowa) tend to have high correlation with corn/soybean yields. The corn/soybean yields of Iowa in 2013 was estimated to be 11.24/3.55 ton/ha and Illinois was estimated to be 10.09/3.06 ton/ha. Errors were 6.06/17.58% and -10.64/-7.07%, respectively, compared with the yield forecast of the USDA. Crop yield distributions in 2013 were presented to show spatial variability in the state. This leads to the conclusion that NPP changes in the crop field were well reflected crop yield in this study.

• Asian-Australasian Journal of Animal Sciences
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• v.5 no.4
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• pp.717-722
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• 1992

An experiment was conducted to examine the feasibility of producing multiple calves using embryo transfer in Japanese Black cattle. Milk yield of cows and forage intake of calves were measured for 11 cows with single calves, 14 cows with twins and one cow with triplets. The means of 26 weeks cumulative milk yield were 854, 1028 and 1271 kg for cows having singles, twins and triplets, respectively. Male birth weights for single calves, twins and triplet were 34.9, 26.6 and 19.9 kg, and female ones were 31.7, 24.1 and 22.1 kg, respectively. Weight and daily gain of calves were affected by weeks (W), sex (S), the number of calves (N), parity, birth season, $W{\times}N$, $S{\times}N$ and regression on milk yield. Growth rate was higher for single calves than for twins until about 9 weeks of age, then weights increased at a similar rate. Male calf weaning weights for singles, twins and triplets were 207.0, 177.1 and 162.2 kg, and those for females were 185.4, 151.6 and 180.4 kg, respectively. Average regression coefficients of calf growth on milk yield were significant, and single calf was affected more than twin calves by increment of milk yield. As the number of calves per cow increased, hay intake of calves decreased and concentrate intake tended to increase between 6 and 13 weeks of age.

• Magazine of the Korean Society of Agricultural Engineers
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• v.23 no.1
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• pp.75-85
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• 1981

• Magazine of the Korean Society of Agricultural Engineers
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• v.39 no.6
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• pp.31-40
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• 1997

Potential impacts for unfavourable weather conditions and the assessment of the magnitudes of their adverse effects on crop yields were studied. EPIC model was investigated for its capability on crop yield predictions for rice and soybean. Weather generationmodel was used to generate long-term climatic data. The model was verified with ohserved climate data of Suwon city. Fifty years weather data including abnormal conditions were generated and used for crop yield simulation by EPIC model. Crop yield probability function was derived from simulated crop yield data, which followed normal distribution. Probable crop yield reductions due to abnormal weather conditions were also analyzed.

• Magazine of the Korean Society of Agricultural Engineers
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• v.31 no.4
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• pp.50-58
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• 1989

An approach to irrigation scheduling for chinese caggage is presented, and a crop yield response function to soil moisure is derived from irrigation experiments, based on a root- zone water balance method. The paper concludes that crop yield can be estimated by allowable depletion and actual evapotranspiration in 3 cropping stages, and presents the optimal allowalbe depletion, irriga- tion frequency and the amount of irrigation water to get the maximum crop yield and opti- mal irrigation policy.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2003.10a
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• pp.311-314
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• 2003

This research recognized change of the specific yield(Sy) by groundwater level in small size tube well of the farm village area. The result research basin aquifer could quality that the specific yield according to geological quality of aquifer changes showed value of $0.0004{\sim}0.081$ extents according to groundwater level decline.

• Proceedings of The Korean Society of Agricultural and Forest Meteorology Conference
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• 2001.06a
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• pp.109-112
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• 2001

농작물의 생육 및 작황은 내적으로는 품종 자체의 고유 특성과 외적으로는 재배기술, 토양환경, 기상환경 등에 크게 영향을 받는다. 이중 온도, 일조시수 등의 기상조건은 생육과 수량 형성에 직접적인 영향을 미치게 되며 작물의 고유특성인 출수기, 수량구성요소 등도 기상환경에 따라 변이를 나타낸다.(중략)

• Proceedings of The Korean Society of Agricultural and Forest Meteorology Conference
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• 2001.06a
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• pp.113-116
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• 2001

90년대 이후 다양한 첨단전산기술들이 작물모형분야에도 이용되기 시작하였는데 농업생태계 평가를 위한 국지단위 모의모형의 활용, 인공위성 등을 이용한 원격계측정보의 활용, GIS기술 등은 농업분야에서 널리 활용되고 있는 첨단 신기술의 대표적인 사례가 되고 있다. 이러한 신기술들은 농업기상정보를 생산하는 데에 이용될 뿐만 아니라 가장 중요한 환경요소로서 농업기상정보를 필요로 한다(Munakata, 1976).(중략)

• Journal of Mushroom
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• v.14 no.2
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• pp.34-38
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• 2016

This study was performed to determine most appropriate mixed ratio of brewers dried grain to wheat bran as a nutrient supplement in the plastic vinyl bag cultivation of Grifola frondosa. In the examination of an appropriate nutrient source, the IV substrate formulation (80 : 10 : 10, oak sawdust : wheat bran : brewers dried grain) resulted in 71.6 days to harvest and the highest yield of 142.6 g/bag. On the other hand, the investigation of the optimal mixing ratio of beer waste to wheat bran showed that the III substrate formulation (80 : 5 : 15, oak sawdust : wheat bran : brewers dried grain) resulted in the least days to harvest (61.8 days), with the highest yield of 140.8 g/bag.