• 한국초지조사료학회지
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• 제11권1호
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• pp.22-29
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• 1991

This study was experimented to obtain the basic information on the changeable aspect and improvement of soil fertility in newly-reclaimed sloped land. Silage corn was cultivated under the six different treatments for 4 years. The relation between the amount or ratio of annual changes of soil physico-chemical properties and yield of silage corn were analyzed. Soil bulk density was decreased in 3rd year at topsoil, but that decreased in 4th year at subsoil. Soil organic matter also decreased in 2nd year at topsoil, and decreased continuously at subsoil. Bulk density and hardness of soil depths showed significant negative simple correlation with dry matter yield and cation exchange capacity showed positive. Correlation coefficient of chemical properties with dry matter yield were low. The range of annual changes of moisture percent, hardness and organic matter were wider than the other properties. The significantly different of physical properties were higher than the chemical properties, and those of topsoil were higher than subsoil. According to multiple regression between yield and physico-chemical properties of subsoil, bulk density and cation exchange capacity were in the greatest contribution at the variations, but bulk density was greatest at the ratios.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.37-37
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• 2003

Rice is one of the most important crop in the world and is a major export of Thailand. Optical sensors are not useful for rice monitoring, because most cultivated areas are often obscured by cloud during the growing period, especially in South East Asia. Spaceborne Synthetic Aperture Radar (SAR) such as RADARSAT, can see through regardless of weather condition which make it possible to monitor rice growth and to retrieve rice acreage, using the unique temporal signature of rice fields. This paper presents the result of a study of examining the backscatter behavior of rice using multi-temporal RADARSAT dataset. Ground measurements of paddy parameters and water and soil condition were collected. The ground truth information was also used to identify mature rice crops, orchard, road, residence, and aquaculture ponds. Land use class distributions from the RADARSAT image were analyzed. Comparison of the mean DB of each land use class indicated significant differences. Schematic representation of temporal backscatter of rice crop were plotted. Based on the study carried out in Pathum Thani Province test site, the results showed variation of sigma naught from first tillering vegatative phase until ripenning phase. It is suggested that at least, three radar data acquisitions taken at 3 stages of rice growth circle namely; those are at the beginning of rice growth when the field is still covered with water, in the ear differentiation period, and at the beginning of the harvest season, are required for rice monitoring. This pilot project was an experimental one aiming at future operational rice monitoring and potential yield predicttion.

• 한국초지조사료학회지
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• 제15권2호
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• pp.146-150
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• 1995

The yield performance and nutrient quality of barley for pellets making from whole crop material were discussed during 1993-1994. Barley (cv. Olbori) was grown on paddy land after rice cutivation and was harvested at early stage of physiological maturity. A column type of whole crop pellets was produced by 1.5cm diameter and 2.5cm height. Barley war evaluated as a suitable materials for whole crop pellet making. Barley produced higher yield and better qualitative roughage in the utilization of pellet making than in the silage making. Dry matter yields were obtained 12.02 MTha in pellet making and 11.70 MT/ha in silage making. Net energy value of barley pellet were 6.54 MJ in net energy lactation and 635 SV in starch equivalent net energy. Feeding of barley pellet improved milk production of daily cattle Daily milk yields per head were 25.1 liter in silage feeding and 25.9 liter in pellet feeding. Production cost of pellets and silages made from whole crop barley were 169.07 won/kg and 124.15 won/kg dry matter, respectively.

• International Journal of Computer Science & Network Security
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• 제22권9호
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• pp.403-413
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• 2022

Classification and analysis are improved factors for the realtime automation system. In the field of agriculture, the cultivation of different paddy crop depends on the atmosphere and the soil nature. We need to analyze the moisture level in the area to predict the type of paddy that can be cultivated. For this process, Ensemble Modulation Pattern system and Block Probability Neural Network based classification models are used to analyze the moisture and temperature of land area. The dataset consists of the collections of moisture and temperature at various data samples for a land. The Ensemble Modulation Pattern based feature analysis method, the extract of the moisture and temperature in various day patterns are analyzed and framed as the pattern for given dataset. Then from that, an improved neural network architecture based on the block probability analysis are used to classify the data pattern to predict the class of paddy crop according to the features of dataset. From that classification result, the measurement of data represents the type of paddy according to the weather condition and other features. This type of classification model assists where to plant the crop and also prevents the damage to crop due to the excess of water or excess of temperature. The result analysis presents the comparison result of proposed work with the other state-of-art methods of data classification.

• 한국토양비료학회지
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• 제50권2호
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• pp.81-92
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• 2017

Recently, agricultural lands have decreased sharply, which was caused by huge housing site, urbanization, land consolidation, and road construction etc. In particular, Yangju city near Seoul city has the most severe land use change in Korea. Therefore, we analyzed changes of land use, soil properties, and soil information in order to provide the basic soil information and soil management practices in this city. The area of crop cultivated land in Korea (2015) reduced by 12,090 ha compared to ones from the previous year (2014). The paddy field decreased by 25,421 ha but, upland field increased by 13,331 ha. One of the reasons for the reduction of the paddy field was converting paddy field to upland (20,916 ha) > others (3,056) > building (2,571) > public facilities (847) > idle land (217). But, reasons for increase of upland field were switching paddy to upland (20,916 ha) > land developed (634). The main reason of converting paddy field to upland was changing from rice to more profitable speciality crops or pulses. The cropland area (paddy fields, upland, orchard) of Yangju city reduced by 1,412 ha (2015/2014). The ratio of cropland area in each city reduced by 22.9% dramatically compared 2015 to 1999. The paddy fields located in alluvial plains in Yangju city were changed into upland or green house. The drainage classes of soil have been deteriorated because the flows of water were intercepted by road construction and other disturbance to water flows. In particular, paddy fields have been changed to not only upland, orchard, greenhouse cultivation but also to fallow and soil dressing on paddy in Yangju city. To analyze result of soil survey of Yangju city, 858 soil codes (soil phases) were used and the area was 105.17ha. The number of soil series increased from 60 to 65, and that of soil phase increased from 105 to 124. The largest increased area was Noegog soil series. 125.7ha of Neogog soil series was incorporated from the existing Sachon, Yecheon and Eungog soil series. The soil suitability class of paddy field in Ogjung huge housing site of Yangju city was the 4th grade for 32.6% of the area. The soil suitability classes of upland were 2nd and 3rd grade for 72.4% of the area. Farm land with high quality should be conserved by related law.

• 한국농림기상학회지
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• 제21권4호
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• pp.337-346
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• 2019

GIS 기술은 다기준(multiple-criteria) 의사결정 기반으로 작물의 적지 평가를 가능하게 하고 있다. 본 연구에서는 남한지역을 대상으로 최대저해인자법(MLCM)과 분석적 계층화법(AHP)을 활용하여 배 과수의 적지를 평가하였다. 남한지역의 배 과수의 적지 등급 결과는 두 방법간에 큰 차이를 나타냈는데, MLCM 기법에서는 남한 면적의 19.55%에서 적지 등급(S1, S2 및 S3)로 구분된 반면에 AHP기법에서는 99.08%에서 적지로 구분되었다. 즉, MLCM기법은 적지 등급 결정에 매우 엄격한 반면에, AHP기법은 상대적으로 관대한 것으로 분석되었다. 다음으로 어떤 행정구역(도)에서 적지 등급으로 구분된 면적이 많으면 많을수록 더 많은 과수가 재배될 것이라는 가정 하에, 두 가지 방법으로 구분된 적지면적의 비율과 과거 5년(1982, 1987, 1992, 1997 및 2002년) 및 2007년의 실제 배 재배 농장의 면적을 비교한 결과, MLCM기법에 의한 적지 등급의 결과가 더 정확한 것으로 분석되었다. 하지만, 이러한 가정이 항상 진실을 담보하는 것이 아니므로, 어떤 지역에서 배 과수의 재배를 계획하는 농가는 두가지 방법에 의한 적지평가 결과를 함께 참고해야 할 것이다. 더욱 정확한 결과를 얻기 위해서는 향후에 개별 배 농장에서 조사된 생산량과 수익자료를 추가하여 비교 분석할 필요가 있다.

• 한국토양비료학회지
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• 제43권1호
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• pp.16-24
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• 2010

최근에 서산군 이원면에 간척 조성된 이원간척지에서 담수제염처리가 제염효과와 녹비 사료작물의 생육에 미치는 영향을 검토하기 위하여 시험연구가 수행되었다. 담수제염처리효과는 제염시 1회담수량을 400 mm로 하여 400 mm (1회처리), 800 mm (2회처리) 및 1,200 mm (3회처리) 담수제염처리한 구를 대조구 (무담수)와 비교하여 분석하였고, 시험작물은 수단그라스, 피, 세스바니아 및 옥수수였다. 400 mm 담수시 토심 0-20 cm가 35.5%, 토심 20-40 cm가 33.4%, 토심 40-60 cm가 6.5%의 제염효과를 나타내었고, 800 mm 담수시 토심 0-20 cm가 64.9%, 토심 20-40 cm가 59.6%, 토심 40-60 cm가 34.5%의 제염효과를 보였으며, 1,200 mm 담수시 0-20 cm가 78.3%, 20-40 cm가 70.5%, 토심 40-60 cm 가 60.8%의 제염효과를 보였다. 수단그라스, 피, 세스바니아 및 옥수수을 한 필지 내에서 혼작, 또는 간작하는 경우를 가정하여 4종의 시험작물이 모두 양호한 출현율을 얻을 수 있는 염농도관리수준을 알기 위하여 출현율과 토양염농도 간의 회귀관계를 분석한 결과, 출현율이 80% 이상이 되기 위해서는 토양염농도가 7.7 dS $m^{-1}$이하로 제염되어야하고 토양염농도가 15 dS $m^{-1}$이상이 되면 출현하는 개체가 전혀 없는 것으로 추정되었다. 이원간척지의 지하수위는 가장 높을 때가 -23cm였고 가장 낮을 때가 -167 cm로 측정되었고, 지하수의 염농도는 62.2~17.9 dS $m^{-1}$의 범위를 보였다. 제염에 대한 회귀분석결과 담수처리의 용수량이 130 mm 이하일 때는 제염 효과가 미미하였고, 일시에 1,200 mm이상을 담수하여 제염하여도 제염효과가 100%에 도달하기는 불가능한 것으로 분석되었다. 1,200 mm담수제염구의 건물수량(kg $10a^{-1}$)은 수단그라스 1,068, 피 696, 세스바니아 1,426, 옥수수 1,164이었으나 800 mm담수제염구는 1,200 mm제염구의 46.8~74.3%, 400 mm 담수제염구는 2.9~25.5%에 지나지 않았다. 따라서 밭작물재배시 파종전 1,200 mm이상의 담수제염처리는 필수적인 관리지침이 되어야 할 것으로 판단되었다.

• 한국대기환경학회지
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• 제31권1호
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• pp.72-82
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• 2015

We constructed greenhouse gas (GHG) and air pollution (AP) integrated sink/emission inventories and evaluated the environmental value for the vegetation sector in Seoul during year 2010. The data of vegetation, classified into four sectors of cultivated land, forest land, park and street tree, were obtained from Statistics Korea and Seoul City. Based on the previous studies, only $CO_2$ was chosen as GHG sink by vegetation. $NO_2$ and $SO_2$ were chosen as AP sink by vegetation, while isoprene, monoterpene, other VOC (OVOC) and NH3 were chosen as AP emission from vegetation. Estimation methodology and sink/emission factors were gathered from reports and published literatures. Estimated GHG sink by vegetation during year 2010 was 12,987,173 $tonCO_{2eq}$, of which approximately 1/4 was from pure vegetation and the remaining 3/4 from vegetation soil. AP sink and emission were estimated to be 23,309 tonAP and 2,629,797 tonAP, respectively. The analysis by administrative districts in Seoul revealed that among 25 districts, Seocho-gu, Nowon-gu, Eunpyeong-gu, Gwanak-gu and Gangbuk-gu were the major districts in GHG and AP sink/emission inventories for vegetation sector. Environmental value of vegetation as a function of GHG and AP sink, was estimated as 800 billion won, corresponding to 5% of the total cost of the forest land in Korea evaluated as a public function.

• 한국작물학회지
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• 제39권2호
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• pp.175-179
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• 1994

신개간지에서 삼요소비료시용시 몇가지 물리화학적인 개량방법을 병행하여 실시함으로써 율무재배에 대한 기초자료를 얻고자 신개간지에서 율무를 1985년부터 4년간 재배하면서 율무에 대한 삼요소의 수량반응과 토양특성 변화를 조사·분석한 결과는 다음과 같다. 1. 율무의 초장은 종합개량처리구에서 가장 컸는데 2년차까지는 컸으나 3년차부터는 작아졌다. 2. 율무수량은 종합개량처리가 평균 2.16 t/ha로 가장 많고 삼요소 시용 대조구에 비하여 49% 증수되었으며 다른 처리구의 수량은 심경구>인산구>석회구>퇴비구>대조구 순으로 많았다. 3. 토양의 용적밀도나 경도는 표토에서 3년차까지 계속 낮아지다가 개량제 시용이 없었던 4년차에는 높아졌다. 토양산도는 토심이나 년차간에 큰 차이가 없었다.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
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• pp.263-269
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• 1996

In indian agricultural , the energy use pattern has played dominant role in influencing the level of mechanization . Besides that the agro-climatic factors as well as the size of holdings do affect the degree of mechanization . Nearly 30 percent of total cultivated area is owned by l76 percent of the small and tiny land holders each owning even less than a hectare. On the other hand, about 2 percent of land owners cultivate land. These variabilitieshave greatly influenced the ownership of power sources on Indian farms. Small farmers, employ human and animal energies with the use of hand tools and animal drawn equipments. Whereases, the use of tractors, power tillers, electric motors, etc. on small farms is on a marginal scale. There are few pockets and also extensive wheat growing regions where mechanical and electrical power sources are extensively used in production agriculture leading to about 185% of cropping intensity . In that region, the animal energy is employed for on the farm transport of fertilizers, fodders and fuel to support milch animals and other household activities . Inspite of high degree of mechanization, the harvesting of crops is done by human labour with few exceptions of harvesting wheat crops by combines in few pockets. In overall assessment of mechanization, the following conclusions are drawn : ⅰ) Farm operation which show a growing trend of mechanization are (a) tillge, (b) seedling (c) Irrigation (d) Plant protection application (e) Threshing and (f) Transport . ⅱ) Crop cultivation system in respect of wheat, maize and sorghum have been greatly mechanized. ⅲ) The least mechanized cropping systems are (a) vegetable production and (b) cultivation of sugarcane, cotton, rice and pulses. ⅳ) Annual production of tractor has touched the figure of 280.000 by 1995 and the total number has crossed 1.5million on Indian farms.