• Food Science and Preservation
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• v.13 no.6
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• pp.703-707
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• 2006

The propose of this study was to investigate the changes of available components in Chajogi (Perilla sikokiana B.) by different harvest periods. The Chajogi samples were divided into four groups by harvest period. The four groups were divided into I (harvesting sample at 14, July, 2005), II (harvesting sample at 25, July, 2005), III (harvesting sample at 15, Aug, 2005) and IV sample (harvesting sample at 2, Sept, 2005), and then analysed with regard to the content of proximate compositions, minerals, amino acids, perillaldehyde and anthocyanin. The contents of reducing sugar increased with increasing harvesting periods, while those of crude protein, crude lipid and total amino acids decreased for IV sample as compared to the other samples. The levels of heavy metals in all samples were not detected. The Zn, Fe and Mg contents of IV sample decreased sharply. The perilladehyde contents were 0.36%, 0.42% 0.45%, and 0.35% for I, II, III, and IV products, respectively. III sample as contented to the other samples was shown to have the highest anthocyanine content (1.21% in dry basis). In conclusion, the date of harvesting Chajogi affects the contents of available components.

• Korean Journal of Soil Science and Fertilizer
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• v.2 no.1
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• pp.49-51
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• 1969

Manuring has been classified into five stages to study the absorbtive and metabolic process of potassium in the period of growth of soybeans. The contents in harvest time have not shown much difference regardless of earlier or later manuring. But in the testing period of comparatively earlier manuring, supply of potassium has precipitated the synthesizing of carbohydrates, and in the testing period of comparatively later manuring, decrease of not only soluble sugar, but also soluble nitrogen and protein-nitrogen has been discoverd thus resulting in the existence of connection between supply of potassium and nitrogen metabolism.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.37 no.3
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• pp.299-303
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• 1992

Methods for harvesting and storage of rice were also originally introduced from the ancient China like other practices of agricultural techniques. Thus, optimum time or rice harvesting was adopted by appropriate draining to prevent the losses, and efficient tools were utilized for harvesting and manufacturing. In addition, our unique and original techniques for rice storage were learned and handed down, which prevented winds and rains, and allowed good ventilation. In the 15th and 16th centuries, treatment of smartweed extracts as emphasized to prevent insect damage for stored barley and rice cutting immediately at harvest was encouraged to prevent shattering of rice grains. In the 18th and 19th centuries, means for prevention of damages by water, insects and rats when grains stored in the field were suggested. Also, studies for ecology of various rice cultivars and storage techniques for a long period of time were necessarily emphasized to assume the optimum time of harvest regionally and to cooperatively work timely.

• Journal of The Korean Society of Grassland and Forage Science
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• v.14 no.4
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• pp.295-306
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• 1994

The object of this experiment was to suggest the suitable cutting frequency and cutting height for orchardgrass (0G)-red clover(RC) mixtures under the intensive system of short-term pasture utilization. The fields trials were conducted over 3-year period(1991-1993) to evaluate dry matter yield, botanical composition, chemical composition and CP, DDM yield on the cutting frequency (30, 40 and 50 days) and cutting height(5, 7 and 9cm) With decreasing the cutting frequency, the DM yield of OG in the OG-RC mixtures was significantly increased(P

• Korean Journal of Agricultural Science
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• v.46 no.3
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• pp.629-636
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• 2019

This study was conducted to investigate the growth characteristics and yield of whole green rice grains during the ripening period. These were investigated using Hopumbyeo and Unkwangbyeo at two transplanting times and with two kinds of nitrogen fertilization. The transplanting times were May 30 and June 20, respectively, using 30-day seedling culture and transplanting conducted with 3 - 4 plants per hill in planting space of $15cm{\times}30cm$. During nitrogen fertilization, 9 kg and 18 kg was used, respectively. The harvest of the green whole rice grains was carried out on the 15th, 20th, 25th, 30th, and 40th day after the heading date. The clum length was greater with later planting and with application of more nitrogen. The rice yield was higher with nitrogen fertilization of 18 kg/10 a when transplanted on May 30 for Hupumbyeo, and for Unkwangbyeo, was higher at 9 kg/10 a nitrogen fertilization when transplanted on May 30. The protein content of Hopumbyeo was higher when the nitrogen fertilizer was 18 kg/10 a, and that of Unkwangbyeo was lower than that when transplanting on June 20. The greenness was not related to the nitrogen fertilization level when transplanted on May 20 but for later transplanting, the greenness was higher when the nitrogen application was increased, and the greenness was the greatest about 30 days after the heading date.

• Food Science of Animal Resources
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• v.24 no.4
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• pp.424-432
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• 2004

The handling and transport of broiler birds from farm to the processing factory is known to cause injury and dead. The preslaughter period can be compromised through thermal stress, emotional stress, starvation, dehydration, metabolic exhaustion, trauma to the skin and bone fraction resulting in bruising and dead. This paper focuses on the control points of individual post Harvest stages by reference to recent literature. In catching, the injuries and deads are caused from fracture of bone, skin damage and hipbone dislocation. It can be improved by training the catchers. The primary factor of dead during transportation is from thermal stress. It is related to stocking density, type of crate and vehicle, ventilation and transportation time. Of the factors, the ventilation is very important. The holding place should be built with consideration of protection from the hostile external environment. There were not much progresses in this area, however, many researches are conducting to focus on animal welfare in European Union. Recently, it is rapidly changed in marketing custom from whole carcass to portion cut in Korea. This means the increase of economic loss due to the mishandling at post harvest. The systematic approach is demanded for this area.

• Journal of The Korean Society of Grassland and Forage Science
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• v.15 no.4
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• pp.259-264
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• 1995

Several benefits provided by white clover (Tnifoliurn repens L.) can be elevated as relationship between its morphological and physiological characteristics is clarified. The experiment was done to analyze the relationship between them in the clover with different leaf size. Individual plants of Osceola (large leaf), Grasslands Huia (medium leaf) and Aberystwyth S184 (small leaf) were grown in 15m plastic pot containing a 1:2:1 soil:sand:Promix mixture for 55 days, and then clipped to remove all fully expanded leaves every 7, 14 or 28 days. To measure the cultivar response, plants were sampled for morphological and physiological parameters on the date (0) after final harvest and 1, 3, 7, 14 and 28 days after the final harvest and then their relationship was analyzed. Osceola had greater leaf area per trifoliolate but less no. of leaves per plant to result in similar total leaf area per plant of all cltivars. Stolon length and no. of growing tips per plant declined with smaller leaf size although the result in biomass was reverse. Stolon of all cultivars showed the greatest fluctuation in total nonstructud carbohydrate during the regrowing period but nitrogen concentrations of all their fractions and dinitrogen fixation did similar patterns. Stolon and root of Osceola, moreover, were the highest ones. Biomass, stolon length and total leaf area per plant of all cultivars were positively correlated to carbohydrate concentration of all frauions and dinitrogen fixation. In Osceola relationship between nitrogen concentration of stolon and the characters showed in Osceola was positively done.

• The Korean Journal of Food And Nutrition
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• v.32 no.4
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• pp.364-370
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• 2019

This study was conducted to select cultivars and determine the harvest period suited for the availability of biological activities in unripen apple. To analyze effective the components in the apple (Malus domestica), three cultivars, 'Summerking', 'Hongro', 'Fuji' were harvested from 40~50 days after full bloom to harvest time. Soluble solid content increased gradually by ripening but titratable acidity decreased with ripening regardless of the cultivars. The total phenol content significantly reduced with ripening from May 30 to July 30 (p<0.05). Substantially, the total phenol content of 'Hongro' in May 30 was four times higher than that of 'Summerking' in the same period and ten times higher than that of 'Hongro' in August 30. The total flavonoid content reduced with ripening regardless of cultivars (p<0.05) and that of 'Hongro' in May 30 was significantly highest (p<0.05). The ascorbic acid content was the highest in 'Hongro' in May 30 (p<0.05). The contents of tannin and ursolic acid significantly reduced with ripening from May 30 to July 30 (p<0.05), while no significant difference was observed between Hogro and Fuji after July 30. Therefore, 'Hongro' harvested in May 30 was considered to be best in the utilization of the effective components of immature apple.

• Korean Journal of Soil Science and Fertilizer
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• v.1 no.1
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• pp.73-80
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• 1968

The research of nutritional physiology of soybeans has been conducted based upon investigation of growth and harvest depending upon whether manuring was done eariler or later. It has been found out that manuring during the development period of the first compound leaves has resulted in a conspicuous improvement in growth and harvest, and that, though manuring during development period of the sixth compound leaves has not caused better results in comparison with the above case, comparatively good results have been arrived at. It has also been discovered that manuring after the flowering period has brought about a great difference. Particulary manuring after the period of pod adhesion has made little significance. And investigation of the accumulative process of carbohydrate has shown that both the total carbohydrates and soluble sugar have a particular variation-curve with regards to each organ, depending a manuring period. But the remarkable fact has been that later manuring has not indicated any variation-curve that is needed for normal growth. It has been indicated that, in case of earlier manuring, accumulation of photosynthesis has been remarkable, which is due to increase in nitrogen components in a body on account of absorption of nitrogen from fertilizer components. It has been suggested that the quantity of carbohydrates in case of earlier or later manuring has shown a partial significance in the effect of fertilizer.

• Journal of Biosystems Engineering
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• v.31 no.3 s.116
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• pp.188-193
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• 2006

Elevation differences within a paddy field relate strongly to plant health, crop homogeneity, and pest control. For precision agriculture (PA), the elevation within a field should be precisely controlled. We analyzed variation in elevation within a rice paddy field over one crop cycle. The study took place in a rectangular plot (100 m x 30 m). Elevations within the a plots was measured by a laser-equipped surveying instrument, that could determine elevations to precisions of I mm. The test field was divided into grids with 30 squares; elevation was measured at the center of each 5 x 10-m grid square. This study measured elevation during nine observation periods from pre-plowing to post-harvest. Descriptive statistics showed the highest elevations after plowing due to soil disturbance. One-way analysis of variance (ANOVA) revealed significant elevation differences before and after plowing and transplanting, although elevations were similar over the period of crop growth. Comparison of pre-plowing and post-harvest data showed differences in elevations, indicating that elevation changes occurred during plowing, rice transplanting, plant growth, and harvesting. In summary, the above statistical analysis indicated that elevation changes occurred due to plowing but not during the plant growth season or due to harvesting.