• 한국환경과학회지
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• 제30권12호
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• pp.1015-1025
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• 2021

Our research work aimed to evaluate cover crop effects of winter rye on soil characteristics, soil conservation, and yield productivities on potato fields with 15% slope during a fallowed period. There were two controls of bared field without any cultivation and conventional potato cultivation without winter rye. Potato cultivation increased soil pH, organic matter, available phosphate, and exchangeable cation regardless of cover crop cultivation. Sub-soil, particularly, all components of soil chemical properties showed higher value in winter rye cultivation than conventional cultivation. Higher soil density was observed on cover crop cultivation than conventional cultivation resulting from root residues of the cover crop both topsoil and subsoil. Cover crop residues positively affected plant growth and reduced the amount of soil erosion by holding the soil. Although severe soil erosion was seen in conventional cultivation, winter rye cultivation declined soil erosion by 47% during the fallow period on potato slope fields. Distinct soil bacterial communities were detected among treatments and some OTU(Operational Taxonomic Unit)s showed significantly higher abundance in winter rye treatment. Total yield and commercial rate demonstrated no significant differences while higher tuber phosphate, K⁺, and Mg²⁺ contents were observed in winter rye cultivation.

• 농업과학연구
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• 제23권2호
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• pp.323-329
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• 1996

This paper is aims at studying the economics of scale of sweet potato cultivation. Sweet potato is one of the decreasing crop. Its cultivated areas has been decreasing more rapidly than soybean or corn. In this paper 23 farmers were surveyed, including 8 families with less than 1 ha, 7 families with 1-5 ha, and 8 families with more than 5 ha. The results are as follows; First, sweet potato cultivation is good for specialization, considering the high income per acre. Second, there is no good evidence explaining for the economy of scale of sweet potato cultivation, but there is an evidence for the profit of specialization. Large scale farmers have more incomes per acre, lather than more production or less management costs, by means of good sales methods. Third, mechanization of sweet potato cultivation is one of the key factor for successful large scale sweet potato cultivations.

• 한국미생물학회:학술대회논문집
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• 한국미생물학회 2005년도 International Meeting of the Microbiological Society of Korea
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• pp.162-165
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• 2005

Potato scab, an important disease that affects developing tubers, causes a major problem in potato cultivation. The major potato cultivation areas in Korea are located in two Northern provinces, Gangwon and Gyeonggi, and two Southern provinces, Jeju island, and South Jeolla. In these areas, potato scab is widely distributed and has caused severe problem in potato cultivation. Therefore, potato-growing areas were surveyed for identification and distribution of potato scab pathogens from 1996 to 1999. Pathogenic Streptomyces strains were isolated from potato scab lesions and six representative Streptomyces species were characterized based on their phenotypic and molecular characteristics including, pathogenicity, physiological and morphological properties, analyses of 16SrRNA genes and 16S-23S ITS region, DNA relatedness, production of thaxtomin A, and the presence of nec1 and ORFtnp gene homologs. Three species were identified as previously described Streptomyces scabies, S. turgidiscabies, and S. acidiscabies, while other three species having distinct phenotypics properties were identified as novel S. luridiscabiei, S. puniciscabiei, and S. niveiscabiei.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.43-43
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• 2022

This study was carried out to investigate planting density suitable for technology that can produce a lot of small seed potatoes to machine sowing, the test material was made of less than 3 g of seed potatoes, and planting density was 75×10, 75×15, 75×20cm. the results of the test study were as follows, number of potatoes per 10a and number of potatoes under 50 g were the most 75×10cm in 2sowing methods. In view of these results, planting density suitable for technology that can produce a lot of small seed potatoes to machine sowing is judged 75×10cm in 2sowing methods. In order for this study to be applied in the agricultural field, cultivation management such as adequate water supply will be required.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2021년도 추계학술대회
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• pp.153-153
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• 2021

• 한국유기농업학회지
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• 제8권3호
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• pp.99-109
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• 2000

제주지방에서 가을감자의 더뎅이병 방제 및 수량증대를 위해 전작물로 녹비작물(콩, clover, pioneer, orchardgrass)을 '98년 5월 21일부터 7월 28일까지 재배하여 생육최성기에 파쇄, 경운하고 P.E 투명필름(0.01mm)으로 멀칭후 터널 설치, 태양열 토양소독을 실시한 포장에 가을감자를 재배하여 생육상태를 조사한 결과는 다음과 같다. 1. 전작물로 재배한 청예수량은 pioneer BSSF(64.3MT/ha)가 가장 많았으며, 다음으로 콩((25.0MT/ha), clover, orchardgrass 순이었다. P.E 필름멀칭+터널설치중의 상승한 평균지온은 토양깊이 5cm에서 54$^{\circ}C$, 10cm에서 45$^{\circ}C$, 20cm에서 44$^{\circ}C$였다. 콩, red clover 재배구가 비닐멀칭에 의한 토양소독효과로 인하여 가을감자의 더뎅이병 발병도가 낮아지는 것으로 조사되었다. 2. 초장, 엽록소함량치, 지상부생체중, 괴경수량 등의 생육형질은 녹비작물재배 및 비닐멀칭처리에 의해 양호해지는 경향을 보였다. 콩, red clover, pioneer 855F 재배후 감자재배구가 괴경수량이 많아지는 것으로 조사되었다. 3. 가을감자 지상부 및 괴경 중의 T-N, K, Ca함량도 녹비작물재배 및 P.E 필름멀칭에 의해 높아지는 경향을 보였다. 반면에 토양중의 T-N, 유기물함량, K함량은 녹비작물재배 및 P.E 필름멀칭후에 높아졌다가 가을감자 수확후에는 시험시작전 토양의 상태로 다시 낮아지는 추세를 나타내었다

• 한국작물학회:학술대회논문집
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• 한국작물학회 2021년도 추계학술대회
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• pp.138-138
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• 2021

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 춘계학술대회
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• pp.83-83
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• 2022

• 대한환경공학회지
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• 제36권1호
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• pp.13-19
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• 2014

청정한 물환경에 대한 기대가 높아지는 시대에서, 관리가 쉽지 않은 비점오염원에서 발생하는 오염부하량을 산정하여 합리적인 국토관리를 도모할 수 있는 기초자료를 제시하였다. 연구는 2개소의 밭경작지를 대상으로 하였으며 고구마와 벚나무를 재배하는 비점오염원으로 각각 3년 동안에 걸쳐 강우사상을 모니터링 하였다. 오염부하량에 영향을 미치는 가장 중요한 인자는 강우량으로 50 < rainfall (mm)의 강우사상에서는 100% 강우유출량이 발생하여 오염물질을 발생하였다. 그러나 30 < rainfall (mm) ${\leq}50^a$와 10 < rainfall (mm) ${\leq}30^b$에서는 강우유출수에 의한 오염부하에는 작물의 재배방법과 토양의 특성 등이 결정인자로 작용되어, 작물성장이 현저한 벚나무경작지에서 강우유출수 발생빈도는 a : 60%, b : 5%로 고구마경작지에서의 강우유출수 발생빈도보다 낮았으며, 이로 인해 오염부하량도 적었다. 반면, 고구마경작지에서의 강우유출수 발생빈도는 a : 80%, b : 15%로 나타났다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2021년도 추계학술대회
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• pp.152-152
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• 2021