Seoul National University · 農学・生物学
Professor Hee‐Myong Ro's research lab specializes in soil biogeochemistry and environmental systems, focusing on nitrogen cycling, soil water dynamics, and the impacts of soil texture and structure on nutrient retention and loss. The lab investigates processes such as nitrification, denitrification, and nitrate transport in diverse environments—from agricultural soils to tidal-flats—using controlled incubation experiments, isotopic tracers, and fractal modeling. A key research direction involves linking soil physical properties (e.g., pore structure, particle size distribution) to hydrological and biogeochemical functions, particularly in coastal and agroecosystems.
Figures are computed from collected data and may differ slightly.
To interpret the response of ammonia oxidation to changing soil moisture, we conducted a batch aerobic incubation with a loam soil at different soil water potentials (SWP) from −1100 to −11 kPa, and calculated net nitrification rates and apparent isotope fractionation factors (αs/p). With increasing SWP, net nitrification rates increased from 2.3 to 9.8 mg N kg−1 d−1, while αs/p increased from 1.025 to 1.031 at field-capacity (SWP of −33 kPa) but decreased with increasing SWP above field capacit
Tidal-flats play important roles in oceanic nitrogen (N) cycles. Particularly, N loss in the tidal-flats depends on soil texture and yet the dominant N removal mechanism in relation to soil texture is not clear. Therefore, the objective of this study was to investigate the effect of soil texture on NO3−-N removal and transport in texturally contrasting tidal-flats of the western coast of Korea [Gangwha (GH, silt) and Saemangeum (SMG, loamy sand) sites]. To interpret the experimental results, we
By examining the symmetry between the distributions of particle‐size (PSD) and pore‐size (POD) in a soil, as hypothesized by early pore‐solid fractal (PSF) models, we found significant discrepancies in fractal dimensions between the PSD and the water retention curve (WRC) of a soil. Therefore, we developed an asymmetry‐based PSF model to estimate better the WRC directly from the PSD data of a soil. To do so, we adopted the concept of a microscopic arrangement of different‐sized particles to addr
SummaryA pot-lysimeter experiment was designed to assess the N requirements of 'Fuji'/M.9 apple (Malus domestica Borkh.) trees fertilized by drip irrigation with three N rates during 2.5 growing seasons (July 1996 to October 1998). Nitrogen rates of 17 (low), 34 (medium), and 67 mg l–1 (high) were chosen for comparison. Low, medium, and high N rates averaged 0.47, 0.89, and 2.18.g N tree–1 for 1996; 1.07, 2.35, and 4.90 g N tree–1 for 1997; 3.81, 6.93, and 13.69 g N tree–1 for 1998. Correspondin
Open papers in the app to read, cite, and organize with AI.
