Kosuke Noborio
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View article: Transcriptomic Analysis of Rice Varieties Under System of Rice Intensification (SRI) Management
Transcriptomic Analysis of Rice Varieties Under System of Rice Intensification (SRI) Management Open
The System of Rice Intensification which promotes agro-ecological practices like alternate wetting and drying (AWD) to enhance root growth and resource efficiency, relies on the genotypic capacity of rice varieties to undergo physiological…
View article: Soil permittivity measurement using interferometry method with mass-market grade GNSS devices
Soil permittivity measurement using interferometry method with mass-market grade GNSS devices Open
Accurate soil moisture monitoring is essential for agriculture and disaster prevention. However, existing methods often rely on expensive sensors or are limited by satellite coverage. In this study, we propose a low-cost and practical meth…
View article: Micro-nano Bubbles Application in Rice Paddy Soil for Mitigating Methane Emissions
Micro-nano Bubbles Application in Rice Paddy Soil for Mitigating Methane Emissions Open
This study applied micro-nano bubble (MNB) technology to rice paddy soil and evaluated its effectiveness in reducing methane (CH₄) emissions. The experiment was conducted in a lysimeter plot at Meiji University's Ikuta Campus, using a…
View article: Estimation of relative permittivity for measuring soil texture-dependent water content by GNSS-IR
Estimation of relative permittivity for measuring soil texture-dependent water content by GNSS-IR Open
Techniques for measuring the soil moisture content (SMC) using global navigation satellite system-interferometric reflectometry (GNSS-IR) with a positioning antenna have been reported. However, conventional methods are limited to evaluatin…
View article: Water infiltration rate in fine glass beads under micro- and partial gravities
Water infiltration rate in fine glass beads under micro- and partial gravities Open
The applicability of the theory of water infiltration in porous media under low gravities is controversial. We evaluated the hypothesis that infiltration under low gravities can be simulated from horizontal infiltration experiments under 1…
View article: Changes in specific microbial groups characterize the impact of land conversion to oil palm plantations on peat
Changes in specific microbial groups characterize the impact of land conversion to oil palm plantations on peat Open
The conversion of tropical peat swamp forests to oil palm plantations has become a focal point in relation to global change. However, it is difficult to understand the ecological consequences of this conversion because little is known abou…
View article: Effects of Water Management and Rice Varieties on Greenhouse Gas Emissions in Central Japan
Effects of Water Management and Rice Varieties on Greenhouse Gas Emissions in Central Japan Open
Greenhouse gas (GHG) emissions from paddy fields depend on water management practices and rice varieties. Lysimeter experiments were conducted to determine the effect of rice varieties (lowland; Koshihikari (KH) and upland; Dourado Precoce…
View article: Repeated falling-head method for in situ measurements of saturated hydraulic conductivity using a single cylinder
Repeated falling-head method for in situ measurements of saturated hydraulic conductivity using a single cylinder Open
A simple, repeated falling-head (RFH) method, which uses an inexpensive portable cylinder to quickly determine field-saturated hydraulic conductivity (Kfs), is presented. A cylinder of radius r, inserted vertically from the soil surface to…
View article: Gap-filling greenhouse gas fluxes for the closed chamber method at paddy fields using machine learning techniques
Gap-filling greenhouse gas fluxes for the closed chamber method at paddy fields using machine learning techniques Open
Measurements of greenhouse gas (GHG) emissions from paddy fields can often include flux measurement errors due to either instrument errors or unfavorable weather. Therefore, data post-processing, including the gap-filling process, is requi…
View article: A four-parameter-based thermo-TDR approach to estimate water and NAPL contents of soil liquid
A four-parameter-based thermo-TDR approach to estimate water and NAPL contents of soil liquid Open
In-situ determination of soil non-aqueous phase liquid content (θNAPL) is necessary for early detection of soil NAPL contamination and preventing the spread of the contamination. Thermo-time domain reflectometry (thermo-TDR), which can sim…
View article: Frost Forecasting System with Multiple Models of Machine Learning
Frost Forecasting System with Multiple Models of Machine Learning Open
Frost causes damage to crops. Predicting the frost occurrence in advance is highly valuable for practitioners taking possible frost-prevention measures. In our previous study, we have applied machine learning to forecast frost occurrence u…
View article: Evaluating the Distribution of Perfluoroalkyl Substances in Rice Paddy Lysimeter with an Andosol
Evaluating the Distribution of Perfluoroalkyl Substances in Rice Paddy Lysimeter with an Andosol Open
The properties of potential emerging persistent contaminants, perfluoroalkyl substances (PFAS), in an andosol rice paddy lysimeter were analyzed to determine their mobility and leaching behavior regarding carbon chain length and functional…
View article: Pore-Scale Wetting Process of Capillary-Driven Flow in Unsaturated Porous Media under Micro- and Earth-Gravities
Pore-Scale Wetting Process of Capillary-Driven Flow in Unsaturated Porous Media under Micro- and Earth-Gravities Open
Microgravity hinders capillary-driven water flow in unsaturated porous media. Previous studies proposed pore-scale phenomena such as “air entrapment”, “particle separation”, and “interruption on widening void space” to explain gravity-depe…
View article: GREENHOUSE GAS CONCENTRATIONS IN SOIL UNDER DIFFERENT WATER MANAGEMENT PRACTICES FOR RICE PLANTS
GREENHOUSE GAS CONCENTRATIONS IN SOIL UNDER DIFFERENT WATER MANAGEMENT PRACTICES FOR RICE PLANTS Open
In recent years, global warming has been progressing due to increases in greenhouse gas concentrations in the atmosphere. Greenhouse gas emissions from agro-ecosystems impact global warming. In particular, CH4 and N2O are mainly emitted by…
View article: The Effects of Oil Palm Plantation on Fish Composition in Selangor Peatlands, Malaysia
The Effects of Oil Palm Plantation on Fish Composition in Selangor Peatlands, Malaysia Open
The cultivation of oil palm on peat swamps in Malaysia has changed the water quality and aquatic ecosystems. We determined the fish species composition and water quality conditions at a disturbed peat swamp, i.e., oil palm plantation, in K…
View article: Comparing GHG Emissions from Drained Oil Palm and Recovering Tropical Peatland Forests in Malaysia
Comparing GHG Emissions from Drained Oil Palm and Recovering Tropical Peatland Forests in Malaysia Open
For agricultural purposes, the drainage and deforestation of Southeast Asian peatland resulted in high greenhouse gases’ (GHGs, e.g., CO2, N2O and CH4) emission. A peatland regenerating initiative, by rewetting and vegetation restoration, …
View article: Transition Between Constitutive Equations and the Mechanics of Water Flow in Unsaturated Soil: Numerical Simulations
Transition Between Constitutive Equations and the Mechanics of Water Flow in Unsaturated Soil: Numerical Simulations Open
Richards’ partial differential equation normally governs water flows in soil. It can be utilized to investigate water infiltration in the soil. A case study of the Haverkamp’s water infiltration simulation into Yolo Light Clay was carried …
View article: Ensemble causal modelling for frost forecast in vineyard
Ensemble causal modelling for frost forecast in vineyard Open
Being a kind of natural phenomenon, frost occurrence is influenced by environment factors with an accumulated impact. The relation between environment factors and frost event is of cause-effect governed by a process taking place in time. H…
View article: Relationship between atmospheric CH<sub>4</sub> concentration above sea surface and gas plumes from sea?oor along the eastern margin of Japan sea and around Hokkaido
Relationship between atmospheric CH<sub>4</sub> concentration above sea surface and gas plumes from sea?oor along the eastern margin of Japan sea and around Hokkaido Open
The gas seeps from the seafloor were presumed as a potential source of methane (CH4) to the atmosphere. Numerous gas plumes have also been reported around Japanese archipelago. During spring and summer in each 2014 and 2015, we have conduc…
View article: Real time measurements of volumetric water content in seafloor sediments by the Time Domain Reflectometry （TDR）with gravity coring in the surface methane hydrate survey
Real time measurements of volumetric water content in seafloor sediments by the Time Domain Reflectometry （TDR）with gravity coring in the surface methane hydrate survey Open
Solar thermal, wind power, and geothermal heat have become popular as the new energy with the small impact of greenhouse gas emissions, and Methane hydrate is one of them. IPCC （2007） showed that CH4 has high global warming potential which…
View article: Stable Carbon Isotope Studies of CH<sub>4</sub> Dynamics Via Water and Plant Pathways in a Tropical Thai Paddy: Insights Into Diel CH<sub>4</sub> Transportation
Stable Carbon Isotope Studies of CH<sub>4</sub> Dynamics Via Water and Plant Pathways in a Tropical Thai Paddy: Insights Into Diel CH<sub>4</sub> Transportation Open
Separate evaluation of methane (CH 4 ) emission dynamics (e.g., oxidation, production, and transportation) at the soil‐plant‐atmosphere and soil‐water‐atmosphere interfaces has been limited in tropical rice paddies, but it is crucial for c…
View article: Millimeter scale water movement on convex and concave surfaces of porous media under microgravity.
Millimeter scale water movement on convex and concave surfaces of porous media under microgravity. Open
<p>&#160;Human&#8217;s sphere of activities is going to expand to Moon and Mars on 2030s. As manned space mission getting longer, the importance of extra-terrestrial agricultural production increase not only for food producti…
View article: Trial of continuous measurement of micro-nano bubbles in water
Trial of continuous measurement of micro-nano bubbles in water Open
<p>Micro-nano-bubbles (MNBs) are tiny bubbles with diameters ranging from tens of nanometers to several tens of micrometers. Owing to their small diameter, MNBs have some characteristics. Compared with normal bubbles, MNBs have lower…
View article: Infiltration rate in unsaturated glass beads porous media under various gravity made by parabolic flight.
Infiltration rate in unsaturated glass beads porous media under various gravity made by parabolic flight. Open
<p>The Global Exploration Roadmap targets the realization of Mars manned exploration by the 2030s. It is necessary to understand water movement in porous media under microgravity to establish a plant growth system for crop production…
View article: Modelling and learning cause-effect — application in frost forecast
Modelling and learning cause-effect — application in frost forecast Open
With the recent achievements in real world applications, being able to learn cause-effect has been expected as a new aim of artificial intelligence (AI) and machine learning (ML). As a preliminary attempt, causal modelling has been propose…