• 한국토양비료학회지
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• 제49권4호
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• pp.347-354
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• 2016

This study was conducted to investigate the physical and chemical properties of soils in Saemangeum reclaimed lands. The investigated areas were total 5,020 ha which included 220 ha for Agricultural Life site, 2,450 ha for Tourism & Leisure site, 1,130 ha for Industrial & Research site, 820 ha for Bioenergy crop production site, and 400 ha for Rural City site. Soil samples consisting of the upper 20 cm from the surface were collected in every $200m{\times}500m$ of the each site in March and September, 2015. Particle size distribution of soils in the reclaimed land was 83.2% sand, 8.6% silt and 8.2% clay in average. Soil texture was distributed as 40.8% sandy soil, 35.5% loamy sand, and 19.7% sandy loam. Based on the investigation of soil chemical properties conducted in March, 2015, soil pH, electrical conductivity of a saturated soil paste extract (ECe), and exchangeable (Exch.) $K^+$ and $Mg^{2+}$ concentrations were higher than those of the optimum levels for upland soil, whereas soil organic matter content, available (Avail.) phosphate concentration, and Exch. $Ca^{2+}$ concentration were lower than those of the optimum ranges. Depending on the results of the soil chemical properties measured in September, 2015, soil pH, ECe, and Exch. $K^+$ concentration were higher than those of the optimum levels, but soil organic matter, Avail. phosphate, and Exch. $Ca^{2+}$ concentration were lower than the optimum ranges. In addition, distribution of sodic soil ranged between 41.4% and 50.0%, and saline soils were from 16.4 to 31.8%. Soils with pH values above 7.0 increased from 15.3% in March to 35.2% in September. Soils with ECe values over $4.8dS\;m^{-1}$ increased from 45.6% to 50.7%, whereas soils with the values below $2.0dS\;m^{-1}$ decreased from 42.8% to 36.9%.

• 대한원격탐사학회지
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• 제16권3호
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• pp.281-291
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• 2000

본 연구에서는 브라질 서부의 Mato Grosso do Sul 주의 위치하는 장가다. 쟈마이카 두 개의 농장에 유칼리나무 인공조림블록단지를 위한 식재계획을 세워 보았다. 우선 위성사진을 분석하고 GIS에 의해서 현상태대로의 토지이용구분 및 산림식생구분을 하였고 이것을 기초로 하여 조림가능 지역을 계산하였다. 그리고 농장주인의 요구에 따라 조림가능지역에 대한 식재계획을 3차년도까지 수립하였다. 두 개의 농장 총면적은 5,301ha이며 조림가능면적은 3,913ha로서 전체면적의 74%에 해당하는 것으로 추정되었다. 그리고 나머지 26%에 해당하는 1,388ha의 면적은 산림법상 영구보존시켜야 할 산림식생 면적으로 추정되었다. 토양손실을 최소화하기 위해서 등고선에 따라 구획한 조림블록은 1년차에 27개 블록으로 총 1,308.8ha에 이르고, 2년차에도 27개 블록에 1,327.4ha, 그리고 3년차에는 30개 블록에 1,276.5ha의 면적으로 구획되었다.

• 한국산림과학회지
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• 제95권2호
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• pp.220-231
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• 2006

The study was conducted to investigate the differences in carbon storage of Quercus mongolica stands with respect to latitude and altitude in Korea. Study sites were located in Mt. Joongwang, Pyeongchang-gun, Gangwon-do (altitudes 1,300 m, 1,000 m, and 800 m), Mt. Taehwa, Gwangju-si, Gyeonggi-do (altitude 350 m), Mt. Wolak, lecheon-si, Chungcheongbuk-do (altitude 300 m), Mt. Baekwoon, Gwangyang-si, Jeollanam-do (altitude 800 m), and Mt. Halla, Jeju-do (altitude 1,000 m). Total carbon storage and annual carbon storage of Q. mongolica stands were 85-210 tonC/ha and 7.2-10.6 tonC/ha, respectively. Lower latitude (NE) stands of Q. mongolica showed more carbon storage and annual carbon storage than higher latitude stands. Carbon storage and annual carbon storage of Q. mongolica stands were increased in low altitude. Carbon storage of Q. mongolica stands was higher in the northern aspect than in the southern aspect. However, there were no significant differences in annual carbon storage between the aspects.

• 한국환경농학회지
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• 제29권1호
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• pp.1-6
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• 2010

Organic farming system in rice paddy is rapidly expanding in Korea. This study was to find out optimum japonica rice cultivars for organic farming. A field research was conducted to evaluate the characteristics of japonica rice cultivars under no-tillage paddy at Doo-ryangmyeon, Sacheon, Gyeongsangnam-do, Korea. The experimental soil was Juggog series (silty clay loam: 56.0% silt, 31.2% clay and 12.8% sand). In experiment, ten lines of Japanese rice cultivars were tested under no-tillage amended with rye (NTR) and no-tillage without cover crop treatment (NTNT). In addition, two Korean japonica rice cultivars as check cultivars were used in this study. The grain yield in NTR was significantly higher in 6.13 Mg $ha^{-1}$ for Kinuhikari, 5.30 Mg $ha^{-1}$ for Komekogane, 5.25 Mg $ha^{-1}$ for Kosihikari, 5.22 Mg $ha^{-1}$ for Mazizbare and 5.12 Mg $ha^{-1}$ for Akitakomachi compared to two Korean rice cultivars (4.57 Mg $ha^{-1}$ for Hwayoungbyeo and 4.00 Mg $ha^{-1}$ for Ilmibyeo) in that order. While, grain yield in NTNT was significantly higher in 4.90 Mg $ha^{-1}$ for Akitakomachi 3.81 Mg $ha^{-1}$ for Hinohikari, 3.74 Mg $ha^{-1}$ for Umezkusi, 3.67 Mg $ha^{-1}$ for Kosihikari and 3.54 Mg $ha^{-1}$ for Dondokuri compared to 3.02 Mg $ha^{-1}$ for Ilmibyeo and 2.36 Mg $ha^{-1}$ for Hwayoungbyeo, respectively. The number of panicle per $m^2$ and grain number per panicle were indispensible for increasing the yield of rice. These results were able to find out optimum japonica rice cultivar Akitakomachi for organic farming in no-tillage paddy.

• 원예과학기술지
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• 제30권2호
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• pp.123-128
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• 2012

A two year study was conducted on the effects of composted pig manure applications on organically managed intermediate-day onion ($Allium$ $cepa$ L.) with mid-season production. The manure application rates were 0, 4.0, 6.0, and 8.0 $ton{\cdot}ha^{-1}$, and accompanied by organic fertilizer with 240 $kg{\cdot}ha^{-1}$ nitrogen for all treatments. There was a positive linear effect on the marketable bulb yield with increasing applications of pig manure. However, pig manure rates of 6.0 or 8.0 $ton{\cdot}ha^{-1}$ did not affect the marketable yields or bulb weights at harvest. There was no significant difference between pig manure application rates and mineral concentration or nutrient uptake in onion bulbs. Soil pH and electric conductivity (EC) were lower at harvest compared to preplant soil, while exchangeable potassium and calcium contents increased at harvest. However, there were no significant effects on soil pH, EC, and organic matter or exchangeable cations caused by different pig manure application rates. Mineralized $NO_3$-N content was not affected by pig manure application rates except at transplanting and 129 day after transplanting. Based on the results of this study, when organic fertilizer is applied at a rate of 240 $kg{\cdot}ha^{-1}$ N, 6.0 $ton{\cdot}ha^{-1}$ composted pig manure should be adequate for producing onions using an organic production system.

• 농촌계획
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• 제29권4호
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• pp.117-125
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• 2023

This study aimed to analyze the recent status and changes in impervious surface areas and their ratios across regions in Gyeongsangnam-do, providing fundamental data for regional development and impervious surface management. Based on the 'Guidelines for Calculating Water Cycle Management Indicators for Nonpoint Pollution Source Control(Ministry of Environment)', we processed the land characteristics survey map(shapefile) from 2018 and 2022 to analyze impervious surface area and their rates by administrative boundaries. The impervious surface area in Gyeongsangnam-do increased from 75,652 ha in 2018 to 81,055 ha in 2022, with the rate rising by 0.51% from 7.18% to 7.69%. The average of impervious surface area across 545 eupmyeon units expanded by approximately 9 ha, from 139.8 ha in 2018 to 148.8 ha in 2022, with the rate increasing by 0.71%. Concurrently, the whole population declined by 2.8% while the number of households surged by 6.4%, correlating with the growth in impervious areas. Despite population decreases, factors such as population migration, increased household fragmentation, new residential developments, and industrial facility expansions have consistently contributed to the rise in impervious surface area. Notably, even in areas with high impervious surface area rate, significant disparities existed between urbanized areas and predominantly rural regions. Furthermore, about 333 units(61% of the whole eupmyeons), showed negligible changes in their impervious surface area rate, with an increase of less than 0.5%.

• 한국산림과학회지
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• 제95권3호
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• pp.299-308
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• 2006

본 연구는 위도와 해발고에 따른 우리나라 신갈나무림의 에너지 고정량을 알아보기 위해 강원도 평창군 중왕산 지역(해발 1,300 m, 1,000 m, 800 m), 경기도 광주시 태화산 지역(해발 350 m), 충청북도 제천시 월악산 지역(해발 300 m), 전라남도 광양시 백운산 지역(해발 800 m), 제주도 서귀포시 한라산 지역(해발 1,000 m)을 대상으로 수행되었다. 우리나라 신갈나무림의 에너지량은 2,916~6,550 GJ/ha이고, 연간 에너지 고정량은 250~440 GJ/ha이다. 신갈나무림의 에너지량과 연간 에너지 고정량은 위도가 낮아질수록 더 많아지는 것으로 나타났다. 해발고가 낮을수록 신갈나무림의 에너지량은 증대되는 것으로 나타났다. 신갈나무림의 연간 에너지 고정량과 환경 인자간의 상관관계는 온도, 해발고, 임령, 사면 등의 순서로 크게 나타났다.

• 한국응용곤충학회:학술대회논문집
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• 한국응용곤충학회 2002년도 합동 춘계 학술발표회
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• pp.155-155
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• 2002

• 한국토양비료학회지
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• 제43권5호
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• pp.637-643
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• 2010

석회고토 및 패화석비료를 대체할 수 있는 토양개량제로 활용가치가 높은 굴껍질을 사과 '감홍' 재배 과수원에 시용하여 고두병 발생에 미치는 효과를 검토하였다. 석회고토와 굴껍질을 처리한구는 무처리구에 비해 표토와 심토의 토양 pH와 치환성 칼슘 함량이 증가된 반면, 치환성 나트륨 함량은 차이가 없었다. 사과의 고두병 발생비율은 무처리구가 10.4%로 가장 높았고 굴껍질 4 Mg$ha^{-1}$ 이상 처리할 경우 3.7% 이하로 유의적인 감소를 보였으며 석회고토 처리구는 8.9%로 무처리구와 비슷한 수준이었다. 굴껍질 시용량과 수확기 표토 및 심토의 pH와 치환성 칼슘 함량은 고두병 발병비율과 고도로 유의적인 부의상관을 보였다. 고두병 발병비율을 경감시킬 수 있는 굴껍질 시용량은 4 Mg $ha^{-1}$ 이지만 시험 후 토양의 치환성 칼슘 함량, pH 및 과실중량, 수량 등을 감안할 때 최적의 굴껍질 시용량은 2 Mg $ha^{-1}$로서 석회소요량과 같았다.

• 한국농공학회지
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• 제20권1호
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• pp.4614-4625
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• 1978

The construction of the equipment of water utilization has been developed since the ancient Korea period, 1906 in order to develope and modernize the agriculture. As the results, 83% of total paddy field area, 1,268,949.8 ha has developed into the irrigated paddy field, and the rest of area, 17% has remained nonirrigated paddy field (due to the data of the statistics of 1975). The ratio of the irrigated paddy field area among the total weir was marked 13.14% (area, 137,926.3 ha) and the third grade of total irrigated paddy field in accordance with the facilities of water utilization. In case of Gangwon-Do, the 44.18 percentage of the total irrigated paddy field, 51,057.2ha has been and pointed out first grade. As the results, we found out the following articles : 1. The total weir, 1,641 that sumed concrete weir 647 and conventional weir 967 has been constructed and has irrigated the 44.l8% of total irrigated paddy field of Gangwon-Do. 2. These weirs have been public possession of those villages to be 96.1 percentage of total weir and was controled by them. 3. Those weirs that were constructed across tributary (first, secondary and third tributary) at vallies (elevation 100∼1,000m) have marked that 45 percentage of total number of catchment area has 100∼1,000 ha, and 70 percentage of total number of basin area has been below 10 ha and has constructed about 5 of step-shape. 4. The construction of most weirs has became generally about 50m length, about 1m height. 5. The 80 percentage of newly constructed concrete weir has aged below 10 years. It seemed that 79 percentage of conventional weir has aged over 20 years and 41% of contructed weir has needed to be improved quickly. 6. If privious weirs, 296 will constructed newly, they can irrigate 3,600.8 ha of paddy field and 45.8% of total irrigated paddy field will have been and will contribute to the production of much rice.