A5033548666- Soil Carbon and Nitrogen Dynamics
- Soil and Water Nutrient Dynamics
- Phosphorus and nutrient management
- Soil Geostatistics and Mapping
- Heavy metals in environment
- Spectroscopy and Chemometric Analyses
- Clay minerals and soil interactions
- Geochemistry and Geologic Mapping
- Crop Yield and Soil Fertility
- Soil erosion and sediment transport
- Constructed Wetlands for Wastewater Treatment
- Soil Management and Crop Yield
- Wastewater Treatment and Nitrogen Removal
- Plant nutrient uptake and metabolism
- Phytase and its Applications
- Hydrology and Watershed Management Studies
- Pesticide and Herbicide Environmental Studies
- Legume Nitrogen Fixing Symbiosis
- Wastewater Treatment and Reuse
- Aquatic Ecosystems and Phytoplankton Dynamics
- Remote Sensing in Agriculture
- Nematode management and characterization studies
- Spectroscopy Techniques in Biomedical and Chemical Research
- Groundwater and Isotope Geochemistry
- Soil and Unsaturated Flow
University of Illinois Urbana-Champaign
2017-2025
Environmental Earth Sciences
2024
Ithaca College
2024
Argonne National Laboratory
2023
Illinois Department of Natural Resources
2022
The Ohio State University
2021
University of California, Davis
2014-2017
International Center for Tropical Agriculture
2017
Soils are a major player in the global carbon (C) cycle and climate change by functioning as sink or source of atmospheric dioxide (CO2). The largest terrestrial C reservoir soils comprises two main pools: organic (SOC) inorganic (SIC), each having distinct fates functions but with large disparity research attention. This study quantified soil trends proportional focus on SOC SIC pools based bibliometric analysis raise importance fully underrepresented research, applications, modeling....
The objectives of this study were to examine soil organic matter (SOM) functional group composition and its relationship labile SOM fractions with diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). We analyzed soils from 13 organically managed tomato ( Solanum lycopersicum ) fields in northern California for C, N, P by DRIFTS bands representing groups, including aliphatic C‐H (2924, 2850, 1470, 1405, 1390 cm ‐1 ), aromatic C=C (1650 (920, 840 polysaccharide phenol C‐O...
Cover crops have been reported as one of the most effective practices to increase soil organic carbon (SOC) for agroecosystems. Impacts cover on SOC change vary depending properties, climate, and management practices, but it remains unclear how these control factors affect benefits from crops, well which can maximize benefits. To address questions, we used an advanced process-based agroecosystem model, ecosys, assess impacts winter cropping accumulation under different environmental...
Abstract Permanganate oxidizable carbon (POXC) is a popular soil health test developed to measure “labile” C via the reduction of permanganate, dependent on several stoichiometric oxidation assumptions. As proof‐of‐concept experiment evaluate interpretation POXC as C, we tested 17 compounds ranging in biological lability under standard assay conditions at fixed mass (25 mg) quartz (2–0.053 mm diameter) matrix. was high for lignin, whereas carbohydrates did not differ from control. Functional...
Agriculture contributes nearly a quarter of global greenhouse gas (GHG) emissions, which is motivating interest in adopting certain farming practices that have the potential to reduce GHG emissions or sequester carbon soil. The related emission (including N2O and CH4) changes soil stock are defined here as "agricultural outcomes". Accurate quantification agricultural outcomes basis for achieving reductions agriculture, but existing approaches measuring direct measurements, factors,...
Abstract A defining feature of the Anthropocene is distortion biosphere phosphorus (P) cycle. relatively sudden acceleration input fluxes without a concomitant increase in output has led to net accumulation P terrestrial‐aquatic continuum. Over past century, been mined from geological deposits produce crop fertilizers. When inputs are not fully removed with harvest biomass, remaining accumulates soils. This residual uniquely anthropogenic pool P, and its management critical for agronomic...
There is an increasing interest in developing agricultural management practices that support a more nature-based, sustainable food production system. In organic systems, extracellular enzymes released by soil microorganisms are important regulators of the cycling and bioavailability plant nutrients due to lack synthetical inputs. We used chronosequence coupled with paired field approach evaluate how potential activity hydrolytic changed over time (0–69 years) during transition from...
Abstract In the last two decades, permanganate has been used to define what is assumed be a labile or “active” soil carbon (C) pool, commonly referred as “permanganate‐oxidizable carbon” (POXC). However, uncertainties in reduction reaction (Mn 7+ → Mn 4+ /Mn 2+ ) and even greater oxidation (C ? C well of non‐C reductants sample preclude calculation milligram per kilogram oxidized. Combined variation reduction–oxidation reactions can entail up fivefold how much organic oxidized unit reduced....
Core Ideas Spectral subtractions are a tool for improving FTIR spectroscopy. Minor components of soil spectra such as SOM can be resolved by subtracting interfering backgrounds (e.g., minerals). Limitations to spectral specific both spectroscopy and soils. There is strong potential improve accuracy applications in spectra. Soil science research increasingly applying Fourier transform infrared (FTIR) analysis organic matter (SOM). However, the compositional complexity soils dominance mineral...