• Asian-Australasian Journal of Animal Sciences
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• 제5권4호
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• pp.709-715
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• 1992

In this study attempts were made to identify the areas of single animal ploughing (SAP) in Bangladesh, causes of its localization and the socio-economic constraints hindering the expansion of the system. To determine the areas of single animal ploughing, 123 upazilas of 15 districts were surveyed. Of them, 16 upazilas were found heavily engaged with this system. A detailed investigation of 469 SAP and 439 double animal ploughing (DAP) farmers revealed that there was significant difference between the two systems in respect of cost of production and yield per unit of land. The benefit/cost (B/C) ratio was higher in SAP system. However, no significant difference was observed in respect of time required for ploughing, intensity of cropping, cost of implements, and cost of repairing implements (except yoke). The study recommends for expansion of SAP system in areas where buffaloes are concentrated. Fro this purpose, logistic and institutional supports need to be made available.

• 한국작물학회:학술대회논문집
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• 한국작물학회 1998년도 21세기 한반도 농업전망과 대책(한국작물학회.한국육종학회 공동주관 심포지움 회보)
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• pp.288-312
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• 1998

In Korea, chemical fertilizers and agricultural chemicals have had a significant impact on food production and these are today thought to be an indispensable part of modern agriculture. On the other hand, socioeconomical and IMF and WTO status in Korea are constant reminders of the vulnerability of our fossil fuel dependent agriculture. A new crop production system to improve economic, environmental and production efficiency must be exploited. Our particular concern has been given to an integrated cropping system involving recycling of crop residues, soil and N management, biological N fixation and multipurpose legumes. As a new integrated crop production system, a no-till direct-sown rice-vetch relaying cropping system has been proposed in this paper. The formulation of this system is based on the conception that N fertilizers being neither limitlessly available nor affordable, the current high-input crop production systems have produced troubled results severe labour shortage ill rural areas, balance of payment, environmental degradation and reduction of human health far exceed economic concerns. A natural and logical consequence is that long-term sustainability of agricultural systems must rely on the use and effective management of internal resources. Based on the information obtained throughout a series of experiments last years we have proved that the no-till direct-sown rice-vetch relaying cropping system dictates biological alternative which can augment, and in some cases replace, N fertilizers. Comprehensive discussions were made for the proposed system and it concluded that the system can offer an economically attractive and ecologically sound means of reducing external nitrogen input and improving the quality and quantity of internal resources, and consequently improving the farmers as well as the national returns.

• 한국토양비료학회지
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• 제26권1호
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• pp.49-56
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• 1993

답전윤환지(畓田輪換地) 토양(土壤)에서 작부체계(作付體系)를 달리했을때 작물(作物)의 생육시기별(生育時期別) 토양(土壤)에서 방출(放出)되는 지구온난화원인(地球溫暖化原因)가스 -이산화탄소(二酸化炭素)($CO_2$), 메탄($CH_4$) 및 아산화질소(亞酸化窒素)($N_2O$) -양(量)을 조사(調査)한 결과(結果)를 보면 다음과 같다. 1. 작물재배기간중(作物栽培期間中) 이산화탄소(二酸化炭素)의 방출량(放出量)은 벼 연작재배시(連作栽培時) 가장많고 벼와 콩의 윤작재배시(輪作栽培時) 가장 적은 양(量)을 방출(放出)했으며, 답전윤환(畓田輪換) 방법별(方法別)로는 벼 연작토양(連作土壤)이 가장 많았고 매년윤환(每年輪換) 및 이년윤환(二年輪換)은 비슷했으며, 전전환시(田轉換時) 가장 적은 방출량(放出量)을 보였다. 2. 메탄의 방출량(放出量)은 벼 연작재배토양(連作栽培土壤)에서 가장많은 방출량(放出量)을 보였으며 답전윤환(畓田輪換) 및 벼와 콩 혹은 감자와 배추 등(等)을 윤작재배(輪作栽培)하므로써 방출량(放出量)의 뚜렸한 감소를 보였다. 3. 아산화질소(亞酸化窒素) 방출량(放出量)은 감자와 배추를 이년(二年)마다 윤환재배(輪煥栽培)하므로써 가장많은 방출량(放出量)을 보였으며 다음은 벼 윤작재배구(輪作栽培區)에서 많았다. 그러나 답전윤환구(沓田輪換區)의 벼와 콩 및 감자와 배추를 윤작재배(輪作栽培)하므로써 뚜렷한 감소(減少)를 보였다. 4. 토양(土壤) 공기중(空氣中) 산소(酸素) 및 이산화탄소(二酸化炭素) 구성비율(構成比率)은 작물(作物)의 생육시기(生育時期)에 따라 대단히 상이(相異)했으며 작물재배기간중(作物栽培期間中) 산소(酸素)는 4~10%로 대기(大氣)보다 낮고 이산화탄소(二酸化炭素)는 1~22%로 대기(大氣)보다 수십 내지 수백배로 높았으며 변이(變異) 폭(幅)이 대단히 컸다. 5. 작물재배기간중(作物栽培期間中) 이산화탄소(二酸化炭素)($CO_2$), 메탄($CH_4$) 및 아산화질소(亞酸化窒素)($N_2O$) 등(等) "지구(地球) 온난화(溫暖化) 원인(原因)가스"의 방출(放出)은 작물재배지(作物栽培地) 토양(土壤)의 수분(水分), 온도(溫度), 산소농도(酸素濃度) 및 양분(養分) 등(等)의 변화(變化)와 작물생육시기(作物生育時期)에 따라 크게 영향(影響)되었다.

• Asian-Australasian Journal of Animal Sciences
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• 제14권5호
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• pp.733-745
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• 2001

This review paper discusses the relevance and potential importance of food-feed systems in Asian agricultural systems, and in particular the role and contribution of legumes to these systems. A food-feed system is one that maintains, if not increases, the yield of food crops, sustains soil fertility, and provides dietary nutrients for animals. It involves a cropping pattern within which the feed crop has many beneficial effects without competing for land, soil nutrients and water with the food crops. The agricultural environment is described with reference to the priority agro-ecological zones and prevailing mixed farming systems in Asia. Within these systems, animal production is severely hampered by critical feed shortages which can however, be alleviated by the integration of suitable leguminous forages into the cropping systems. The review also focuses on the role and potential importance of leguminous forages in terms of biodiversity, their uses in farming systems, beneficial effects on animal performance, and draws attention to six case studies in different countries that clearly demonstrate many benefits of developing such food-feed systems. Considerable opportunities exist for widening the use of forage legumes in the development of systems with several complementary advantages (e.g. fenceline, cover crops, fodder banks, forage source and erosion control) to improve the development of sustainable crop-animal systems in Asia.

• 농촌계획
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• 제11권2호
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• pp.51-57
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• 2005

It has been well known that soil erosion and sediments from alpine agricultural fields are causing severe water quality and turbidity problems in receiving waters. Also these result in the loss of money because farmers have to buy top soils to provide enough root zone in the following year. Thus, there have been needs to reduce soil erosion and sediment discharge into the stream networks. To accomplish this end, an effective erosion control plans should be developed based on scientific research, not by rule of thumb. The Universal Soil Loss Equation (USLE) has been widely used to estimate the soil erosion in many countries over the years. In this study, the USLE was used to estimate soil erosion potential under different cropping scenarios in HongCheon County, Kangwon. The soil erosion potential for continuous corn cropping was the highest compared with those from continuous potato find average cropping scenarios. This indicates the soil erosion plans need to be established considering cropping system in the field. The Unit Stream Power Erosion-Deposition (USPED) was applied for HongCheon County to estimate soil erosion and deposition areas. The USPED estimated results can be used to complement USLE results in developing effective erosion control plans.

• Current Research on Agriculture and Life Sciences
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• 제32권2호
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• pp.105-109
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• 2014

The soybean [Glycine max (L.) Merr.], an edible legume, has a high protein content in both its hay and grain, so it is often used as a supplement for other forages that have a deficient protein concentration. Therefore, this study investigated the forage quality and yield in the case of mixed planting of soybean and corn. The forage yield and quality were assessed for three cropping patterns: soybean mono planting, corn mono planting, and mixed planting of soybean and corn. For planting, this study used a forage corn cultivar, Kwangpyeongok, and three recombinant inbreed lines, W2, W4, and W11, selected from Glycine soja (PI483463)${\times}$G. max (Hutcheson). The mixed planting of soybean and corn produced a higher forage yield than the corn mono cropping. The crude protein and crude fat content were also increased with the mixed planting of soybean and corn when compared with the corn mono cropping. Some decrease of ADF and NDF, and increase for RFV in mixed planting of soybean and corn than corn mono cropping. Therefore, the results show that mixed planting of soybean and corn is an effective cropping system to improve the forage quality.

• 한국토양비료학회지
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• 제49권5호
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• pp.480-488
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• 2016

Soil microbes are widely well known to play an important role for sustainable agriculture in terms of crop healthy cultivation and environmental conservation. In this context, the distributional characteristics of soil microbes according to cropping systems were investigated under rice (R)-rice (R), rice (R)-barley (B)-rice (R), and soybean (S)-barley (B)-soybean (S) cropping condition to get basic informations for sustainable agriculture, where barley was grown for winter, in mid-mountainous loam paddy located at the altitude of 285 m above sea level in Sangju area from 2014 to 2015. Estimating from microbial communities by fatty acid methyl ester (FAME) method, a total biomass of bacteria, actinomycetes, and fungi in R-B-R plot was 37% and 40% higher than that in S-B-S and R-R plots, respectively (p < 0.05). In especial, bacteria and fungi were more in R-B-R plot than those in any other ones. B. japonicum, AMF, and mesophilic Bacillus sp. were also greater in S-B-S plot than those. In the community distribution, however, bacteria and actinomycetes showed comparatively high values in S-B-S plot relative to either R-R or R-B-R plot including rice, in which fungi outstanding. In the correlation between microbial biomass and soil properties changed by the cropping, bacteria was positively correlated with C:N ratio; actinomycetes with exchangeable Ca; fungi with available $P_2O_5$ (p < 0.05). While these microbes showed negative response to water stable aggregates of soil.

• 한국토양비료학회지
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• 제43권6호
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• pp.1012-1017
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• 2010

본 연구는 고추 연작의 작부체계가 토양 미생물의 변화에 미치는 효과를 분석하고자 10년 동안 무농약 및 화학적 무비료의 시용방법으로 수행되었다. 지표 PLFAs 분석을 통해 토양미생물상과 활성도를 평가하였다. 고추와 마늘의 단작, 마늘과 고추의 간작의 작부체계에 따른 토양의 화학학성은 큰 차이를 보이지 않았으나 토양 미생물의 PLFAs의 다양성은 PC2에서 다른 작부체계와 상이한 미생물상으로 구분되었으며, 토양 미생물의 PLFAs의 총량은 마늘 단작구와 비교하여 고추 단작구에서 유의적인 감소를 보였으며, 미생물군집의 구조는 내생균근균의 비율에서 유의성있는 감소를 보였다. 이는 마늘과 고추의 근계에 따라 내생균근균의 미생물체량의 감소하였으며, 이것이 토양미생물상과 활성도를 다른 작부체계와 구분한 것으로 판단된다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2018년도 추계학술대회
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• pp.20-20
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• 2018

• 식물병연구
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• 제20권4호
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• pp.303-306
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• 2014

전남지역의 영암, 장성, 화순 등 주요 재배주산지에서 2012년부터 2013년까지 2년동안 토마토황화잎말림바이러스 병의 발생현황을 조사하였다. 바이러스는 토마토 시료로부터 전체 DNA를 추출하여 PCR을 실시하였다. 토마토 재배작형별 바이러스 발병포장율은 반촉성작형은 23%, 억제작형은 59.4%였으며, 이병주율은 각각 0.4%, 13.1%였다. 저항성품종 재배시에는 작형에 관계없이 발병율이 매우 낮았으며, 감수성 품종 재배시에는 발병포장율은 반촉성은 24.3%로 낮았으나, 억제작형은 83.0%로 매우 높았다. 하지만 저항성 품종 재배시에는 발병 포장율은 반촉성은 발생되지 않았고, 억제작형은 9.1%였다. 토마토황화잎말림바이러스는 4월 정식시 6월 상순부터 발생하였고, 8월과 9월에 정식하였을 때 20일 후부터 발생하기 시작하였다.