• Title/Summary/Keyword: cultivated crop

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Effect of Paddy and Upland Conditions on Yield and Storage of Onion Bulbs (논밭 재배지 조건에 따른 양파 채종용 모구의 수량 및 저장력 변화)

  • Cho Sang-Kyun;Lee Eul-Tai;Oh Young-Jin;Choi In-Hu;Kim Young-Jin;Kim Jung-Gon
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.51 no.5
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    • pp.401-407
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    • 2006

  • This study was conducted to investigate the effect of onion cultivation under paddy and upland condition on the yield and storage of onion bulbs. In comparison of soil conditions, nitrogen, phosphate, potassium content and average temperature in upland condition were higher than those of paddy condition, but calcium, magnesium, sodium and water content in paddy condition were higher than those of upland condition. The growth of aerial part was better in upland cultivated condition. It showed that bulb formation in paddy cultivated condition was faster during in early growth stage, but was slower during in late growth stage. Average bulb size and weight were higher in upland cultivated condition, but dry weight per 100 g fresh weight and bulb hardness were higher in paddy cultivated condition. Sugar contents, inorganic compounds, nitrogen, phosphate and potassium content of onion were higher in upland cultivated condition, but calcium, magnesium and sodium content of onion were higher in paddy cultivated condition. In distribution of onion bulb size, most of large sized onions were produced in upland cultivated condition. Average bulb production for seed harvesting were $63{\sim}70%$ higher in paddy cultivated condition than that of upland cultivated condition. The rotted rate of onion was about $27.2{\sim}34.6%$ in paddy, $37.5{\sim}51.4%$ in upland cultivated condition respectively, showed favorable result as the difference of $8.7{\sim}24.2%$ in paddy cultivated condition.

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Establishment of Sesame Cultivation Practices as Succeeding Cropping System of Watermelon in the Greenhouse Condition

  • Shim, Kang-Bo;Hwang, Jung-Dong;Pae, Suk-Bok;Lee, Myoung-Hee;Ha, Tae-Joung;Park, Chang-Hwan;Park, Keum-Yong;Son, Jeong-Hee
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.55 no.3
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    • pp.195-199
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    • 2010

  • This experiment was conducted to develop optimum sesame cultivation practices as succeeding cropping system of watermelon in the greenhouse condition. We also compared major components in sesame seed cultivated in the greenhouse and open field condition. The adaptable varieties under the greenhouse condition were white sesame 'Pyoungan' and black sesame 'Jinki' which showed higher yield and disease resistance. We also conducted several experiments to determine optimum sowing date, planting density and pinching time. Grain yields were statistically different according to the several sowing dates. In general, sesame sowing on June 30th showed higher grain yields than July 10th, July 20th and July 30th in the greenhouse. We also found out sesame cultivation practice with the row spacing of 40 cm and interplant spacing of 30 cm (a few branch type) or 40 cm (many branch type) showed higher yield than other treatments. Optimum pinching time was 25 days after first flowering in main stem when thousand seed weight and grain yield were highest. In the comparison of major components of sesame at the different cultivation conditions, sesame seeds cultivated in the greenhouse contained 4% much more oil content than open field condition. The lignan compounds, sesamin and sesamolin were also higher by 6% in the greenhouse than open field condition. It was concluded that sesame cultivation practices as succeeding cropping system of watermelon in the greenhouse condition guaranteed higher grain yield with less labor input which is now emerging alternative farming practice system in present aging rural society and will also give sesame cultivation farmers to increase net income in Korea.

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The Occurrence of Weed species in Cultivated Ligularia fischeri Fields (곰취밭에 발생하는 잡초양상)

  • Lee, In-Yong;Kim, Chang-Seok;Lee, Jeongran;Kim, Jonghwan;Kim, Kyung-Hoon;Kim, Mi-Seon;Song, Hee-Kun;Kim, Duk-Hwan
    • Weed & Turfgrass Science
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    • v.3 no.2
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    • pp.95-101
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    • 2014

  • This study was conducted in order to utilize the basic data for weed control by surveying the occurrence of weed species and the degree of damages caused by those weeds occurred in cultivated Ligularia fischeri fields. Survey was carried out five times, on May, June, July, August and October in 2013. The weed flora was composed of a total of 104 weeds, 37 families, of which 55 species were annual, 25 species were biennial, and 24 were perennial plants. Twenty-six exotic species were included as well. Dominance was the highest with Chenopodium album followed by Stellaria aquatica, Echiochloa crus-galli, Conyza canadensis, and Artemisia princeps etc. in order. In the PCA plot analysis, weeds occurred in cultivated L. fischeri fields were divided into three groups, Persicaria thunbergii-Bidens frondosa community, Chenopodium album community and Capsella bursapastoris community. The degree of damages in cultivated L. fischeri fields was investigated by weighing roots of L. fischeri. We found that 56% decreased root weight in no weeding plots comparing to that in weed management plots. We infer from this result that decreased roots will affect to the growing of L. fischeri in following year.

  • https://doi.org/10.5660/WTS.2014.3.2.95 인용 PDF KSCI KPUBS