A5079272425- Methane Hydrates and Related Phenomena
- Geophysics and Gravity Measurements
- Ionosphere and magnetosphere dynamics
- Soil Geostatistics and Mapping
- Soil erosion and sediment transport
- Soil Carbon and Nitrogen Dynamics
- Seismic Waves and Analysis
- Soil and Unsaturated Flow
- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Soil Management and Crop Yield
- Soil Moisture and Remote Sensing
- Soil and Land Suitability Analysis
- Pharmaceutical and Antibiotic Environmental Impacts
- Geology and Paleoclimatology Research
- Advanced Breast Cancer Therapies
- Agroforestry and silvopastoral systems
- Breast Cancer Treatment Studies
- Prostate Cancer Treatment and Research
- Remote Sensing in Agriculture
- Thyroid Cancer Diagnosis and Treatment
- Agriculture, Soil, Plant Science
- Cancer Cells and Metastasis
- Geochemistry and Geologic Mapping
- Landslides and related hazards
United States Department of Agriculture
2007-2025
Dale Bumpers Small Farms Research Center
2016-2025
Agricultural Research Service
2007-2025
University of Arkansas at Fayetteville
2023
University of Missouri
2023
Louisiana State University
2022
University of Tennessee at Knoxville
2019
Purdue University West Lafayette
2007-2017
State Street (United States)
2011-2016
Universidade Federal Rural do Rio de Janeiro
2016
Analysis and interpretation of spatial variability soils is a keystone in site‐specific farming. Soil survey maps may have up to 0.41‐ha inclusions dissimilar within mapping unit. The objectives this study were determine the degree soil physical properties variance structure, model sampling interval alluvial floodplain soils. profiles ( n = 209) from 18 parallel transects sampled with mean separation distance 79.4 m. Each profile was classified into surface, subsurface, deep horizons....
Soil microorganisms play essential roles in soil organic matter dynamics and nutrient cycling agroecosystems have been used as quality indicators. The response of microbial communities to land management is complex the long-term impacts cropping systems on microbes largely unknown. Therefore, changes bacterial community composition were assessed sequences bio-covers at no-tillage sites. Main effects four different corn (Zea mays L.), cotton (Gossypium hirsutum soybean (Glycine max L.)...
Carbon stored in soils contributes to a variety of soil functions, including biomass production, water storage and filtering, biodiversity maintenance, many other ecosystem services. Understanding organic carbon (SOC) spatial distribution projection its future condition is essential for CO2 emission estimates management options storing carbon. However, modeling SOC spatiotemporal dynamics challenging due the inherent heterogeneity data limitation. The present study developed spatially...
Spatial heterogeneity in environmental factors on the land surface moderates exchanges of water, energy, and greenhouse gases between atmosphere. However, appropriately representing this earth system models remains a critical scientific challenge. We used large dataset (n = 31) soil-forming factors, field observations soil organic carbon (SOC) 6213), machine-learning algorithm (Cubist) to analyze scaling behavior SOC across conterminous United States. found that various are significant...
Aggregate stability is a commonly used indicator of soil health because improvements in aggregate are related to reduced erodibility and improved soil–water dynamics. During the past 80 90 years, numerous methods have been developed assess stability. Limited comparisons among resulted varied magnitudes response management practices influences inherent properties climate. It not clear whether selection specific method creates any advantage investigator. This study assessed four measuring...
Topographic wetness index (TWI) is used as a proxy for soil moisture, but how well it performs across varying timescales and methods of calculation not understood. To assess the effectiveness TWI, we examined spatial correlations between in situ volumetric water content (VWC) TWI values over 5 years soils at 42 locations an agroforestry catena Fayetteville, Arkansas, USA. We calculated 546 ways using different flow algorithms digital elevation model (DEM) preparations. found that most...
Assessment and proper management of sites contaminated with heavy metals require precise information on the spatial distribution these metals. This study aimed to predict map Cd, Cu, Ni, Pb, Zn across conterminous USA using point observations, environmental variables, Histogram-based Gradient Boosting (HGB) modeling. Over 9180 surficial soil observations from Soil Geochemistry Spatial Database (SGSD) (n = 1150), Geochemical Mineralogical Survey Soils (GMSS) 4857), Holmgren Dataset (HD)...
Soil microorganisms are important for maintaining soil health, decomposing organic matter, and recycling nutrients in pasture systems. However, the impact of long-term conservation management on microbial communities remains unclear. Therefore, microbiome responses to is an component especially largest agricultural land-use US. The aim this study was identify community differences following 13-years (hayed (no cattle), continuously grazed, rotationally grazed with a fenced, un-grazed...
Elucidating complex interactions of cover crops and crop residues on soil physicochemical properties is critical to sustaining productivity long-term. Our objective was compare strength chemistry (physiochemical), residue composition, compaction following 15-years cropping system implementation under non-tillage. Main effects were sequences soybean (Glycine max L.), corn (Zea mays cotton (Gossypium hirsutum grown a Loring silt loam, Maury loam. Split-block treatments consisted winter wheat...
Core Ideas Topographic variation influenced soil nutrient distribution in a silvopasture system. High‐resolution digital maps of nutrients were generated. Terrain attributes identified topographic functional units as management zones. Level different. Topography plays crucial role spatial soils; however, studies to quantify influence on from system are mostly lacking. To address this question, 4.3‐ha site northwest Arkansas was selected and total 51 topsoil (0–15 cm thickness) samples...
Unnecessary accumulation of phosphorus (P) in agricultural soils continues to degrade water quality and linked ecosystem services. Managing both soil loss P fertility status is therefore crucial for eutrophication control, but the relative environmental benefits these two mitigation measures, timescales over which they occur, remain unclear. To support policies toward reduced loadings from soils, we examined impact conservation lowering test (STP) different regions with intensive farming...
Abstract Various soil health indicators that measure a chemically defined fraction of nitrogen (N) or process related to N cycling have been proposed quantify the potential supply crops, key function. We evaluated five (total N, autoclavable citrate extractable water‐extractable organic potentially mineralizable and ‐acetyl‐β‐ D ‐glucosaminidase activity) at 124 sites with long‐term experiments across North America evaluating variety managements. found 59%–81% variation in was among sites,...
The central premise of this paper is that extensive modifications land use and hydrology, coupled with intensive management watersheds in the Midwestern United States over past century, have increased predictability hydrologic responses, allowing for simpler, minimum‐calibration models. In these engineered watersheds, tile‐and‐ditch networks effective drainage density created bypass flow systems generate “flashy” “predictable” hydrographs. We propose a simple, threshold‐based model,...
Dynamic soil chemical interactions with conservation agricultural practices and biota are largely unknown. Therefore, this study aims to quantify long-term (12-yr) impacts of cover crops, poultry litter, crop rotations, no-tillage, their on dynamic properties determine relationships nutrient cycling, yield, biodiversity (soil microbial earthworm communities). Main effects were 13 different cropping sequences soybean [ (L.) Merr.], corn ( L.), cotton L.) at the Research Education Center...
Watershed and pasture health is a transdisciplinary concern crucial to promoting sustainable practices. The aim of this study identify effective systems-level conservation management practices in longitudinal following 14 years consistent by i) teasing apart complex relationships between multivariate water soil quality using principal component analysis (PCA); ii) identifying interactions among variables that contribute most watershed within catchments partial least squares-path modeling...