Jae-Han Lee

Jae-Han Lee
Chungnam National University | CNU · College of Agriculture and Life Sciences

About

29
Publications
2,346
Reads
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80
Citations
Citations since 2016
29 Research Items
80 Citations
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201620172018201920202021202205101520253035
201620172018201920202021202205101520253035
201620172018201920202021202205101520253035

Publications

Publications (29)
Article
Full-text available
Soil carbon is an important factor in the process of mitigating climate change and solving greenhouse gas problems. However, the previous technology for soil carbon content analysis required a lot of labor, time, and expensive equipment (i.e. an elemental analyzer). In this study, the disadvantages of previous analysis method were secured by using...
Article
Full-text available
A quick, accurate and cost-effective method for estimating total soil carbon is necessary for monitoring its levels due to its environmentally and agronomically irreplaceable importance. There are several impediments to both laboratory analysis and spectroscopic sensor technology because the former is both expensive and time-consuming whereas the i...
Article
Full-text available
The use of nitrogen fertilizers to enhance crop growth tends to increase every year. In addition, as eco-friendly agriculture is emphasized, organic fertilizers are preferred over inorganic fertilizers. However, since most of organic fertilizers in South Korea use imported ingredients, an alternative ingredients is needed. Biochar is an eco-friendl...
Article
Full-text available
NH3 emitted into the atmosphere undergoes intricate chemical reactions to form fine particulate matter PM2.5. Nitrogen fertilizers are one of the major sources of gaseous ammonia. Recently, research into using biochar to lessen NH3 emissions from agricultural land has taken center stage and several studies have been executed in that regard. However...
Article
Full-text available
Eggs are likely to be used in agriculture because they can provide enough nutrients for crop growth. Statistics show that a large number of eggs are lost due to breakage before reaching the final consumer. The purpose of this study was to make a natural liquid fertilizer as a substitute for chemical fertilizers using broken eggs as a resource and t...
Article
Full-text available
Nitrogen (N) is the most important element during the process of plant growth, and the quality of crops varies depending on the amount of nitrogen present. Most of the nitrogen is used for plant growth, but approximately 10-20% of Nitrogen is carried away by the wind in the form of NH 3. This volatilized NH 3 reacts with various oxides in the atmos...
Article
Full-text available
Nitrogen plays an important role in plant growth as an essential nutrient. When crops are grown on biochar applied soil, their growth be positive affected. Biochar has been announced as a soil amendment to improve nitrogen (N) use efficiency. The present study aimed to investigate the combined effect of nitrogen fertilizer and biochar amendment on...
Article
Full-text available
BACKGROUND: Biochar has ability to reduce N loss, increase crop yield, and sequestrate carbon in the soil However, there is still limited study concerning the interactive effects of various biochars on NH3 loss and plant growth. This study, therefore, was conducted to investigate the NH4+ adsorption characteristics of biochar derived from rice and...
Article
Full-text available
Nitrogen applied to soil is highly prone to leaching and volatilization leading to gaseous emissions of nitrous oxide (N 2 O) and ammonia (NH 3) which are of great environmental concern. Usage of biochar to reduce the discharge of nitrogen to the environment has attracted much interest in the recent past. Biochar is produced by pyrolyzing various b...
Article
The need for organic soil amendments is increasing in the Republic of Korea against the backdrop of increased soil acidification and nutrient losses. The pyrolysis of biomass produces biochar which not only increases soil productivity but also provides environmental benefits through carbon sequestration. The portion of the brewer's spent grain (BSG...
Article
Full-text available
Ultrafine dust causes asthma and respiratory and cardiovascular diseases when inhaled. Ammonia (NH 3) plays a big role in ultrafine dust formation in the atmosphere by reacting with nitrogen oxides (NO x) and sulfur oxides (SO x) emitted from various sources. The agricultural sector is the single largest contributor of NH 3, with the vast majority...
Article
Food waste causes various economic losses and environmental pollution problems such as soil pollution and groundwater pollution. Food waste has been used as a resource in various forms and has been used mostly for feed and composting. This study compared microalgal nutrient medium (BG-11) with food waste compost to determine the possibility of usin...
Article
Full-text available
The amount of food waste generated in Republic of Korea has been increasing alongside an increasing population and booming economy as such, research on effective treatment and recycling is required. Food waste recycling is complicated by its inferior characteristics such as high levels of water and concern that its continuous application to farmlan...
Article
Sawdust is the main bulking agent used to compost food waste in Korea but it is not an economically desirable choice because its availability entirely depends on imports. Since food waste composting provides agricultural, environmental and economic benefits, it is vital that we search for suitable replacements to sawdust from the locally available...
Article
Formulating biochar-based nitrogen fertilisers from charred livestock manure and urea, the two largest emitters of ammonia (NH 3) may help to abate particulate matter emitted from agricultural operations. However, animal manure biochar inadequately retains carbon, thus impairing its primary role of carbon sequestration. Co-pyrolysis of animal manur...
Article
Co-pyrolysis of animal manure biomass with bone meal (BM) and soaking of the resultant biochar in urea containing solutions may offer a sustainable and cheap way of formulating slow-release nitrogen (N) and phosphorus (P) fertilis-ers. This method can lead to optimisation of the carbon sequestration capacity of the biochar, abatement of environment...
Article
Full-text available
The high intrinsic water content and salinity of food waste prevent a smooth composting process and consequently cause social, economic and environmental problems. In this study, we investigated the distribution of the water content and salinity in food wastes to obtain useful primary data to ensure adequate and quality recycling. A total of 300 fo...
Article
Highly carbonised biochar with desirable characteristics such as high porosity, surface area, mechanical strength, and others is attainable at higher highest treatment temperatures (HTTs). Conversely, however, at these higher temperatures, the availability of most plant nutrients reduces. It is therefore vital to nutritionally enrich such biochar f...
Article
Although animal manures have for years been used to amend the C: N ratios of lignocellulosic wastes to hasten the composting process, their efficiencies in comparison to commercial microbial inoculants are hitherto undocumented. This study purposed to compare the efficacies of a commercial microbial inoculant and poultry litter in composting organi...
Article
Rice paddy fields are a significant source of anthropogenic methane emitted into the atmosphere with several studies reporting heightened emissions after rice straw incorporation into the paddy soils. These emissions may differ owing to the time of straw incorporation into the field, i.e. either during the fallow or growing seasons. In the current...
Article
Blending biochar with non–pyrolysed low–cost wastes and or compost has been mooted as a feasible replacement to pure biochars, that are either costly or don’t give the desired yield increases when used alone. We, therefore, evaluated the effects of two organic amendments containing small quantities of biochar on the soil chemical properties, and pr...
Article
Biochar is a popular organic soil amendment around the world. However, some factors still hinder its full agronomic potentials including low nutrient concentrations especially of aromatic biochar charred from nutrient–poor biomass. Improving the nutrient quality of this type of biochar may necessitate its combined application with organic and or in...
Article
Full-text available
Biochar is the carbon solid produced through the pyrolysis of biomass from organic sources such as agricultural waste, animal manure, and sludge under limited or anaerobic conditions. It is known to function as a soil amendment, affecting water and nutrient retention, soil acidification, and active growth of soil microorganisms. This experiment was...

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