A5013278477- Soil Moisture and Remote Sensing
- Soil erosion and sediment transport
- Soil and Unsaturated Flow
- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Soil Geostatistics and Mapping
- Soil Carbon and Nitrogen Dynamics
- Remote Sensing in Agriculture
- Plant Water Relations and Carbon Dynamics
- Precipitation Measurement and Analysis
- Irrigation Practices and Water Management
- Aeolian processes and effects
- Agriculture, Soil, Plant Science
- Water Quality and Pollution Assessment
- Soil Management and Crop Yield
- Heavy metals in environment
- Pesticide and Herbicide Environmental Studies
- Smart Agriculture and AI
- Composting and Vermicomposting Techniques
- Tree Root and Stability Studies
- Hydrology and Sediment Transport Processes
- Remote Sensing and LiDAR Applications
- Climate change and permafrost
- Rangeland and Wildlife Management
- Greenhouse Technology and Climate Control
Beltsville Agricultural Research Center
2021-2023
Agricultural Research Service
2020-2023
Alabama Agricultural and Mechanical University
2003-2022
Grazinglands Research Laboratory
2020
Kansas State University
2020
Southeast Watershed Research Laboratory
2020
Kentucky State University
2012-2013
Texas A&M University
1997-2006
Virginia State University
1996
University of Maryland, College Park
1993
Surface soil moisture content is highly variable in both space and time. While remote sensing provides an effective methodology for mapping surface over large areas, it averages within‐pixel variability thereby masking the underlying heterogeneity observed at land surface. This must be better understood order to rigorously evaluate sensor performance enhance utility of larger‐scale remotely sensed by quantifying that cannot record explicitly. In support Southern Great Plains 1997 (SGP97)...
Agriculture in the United States must respond to escalating demands for productivity and efficiency, as well pressures improve its stewardship of natural resources. Growing global population changing diets, combined with a greater societal awareness agriculture's role delivering ecosystem services beyond food, feed, fiber, energy production, require comprehensive perspective on where how US agriculture can be sustainably intensified, that is, made more productive without exacerbating local...
Soil hydraulic properties have numerous sources of variability related to spatial, temporal, and management‐related processes. type is considered be the dominant source variability, parameterization typically based on soil survey databases. This study evaluated relative significance other variability: spatial temporal at multiple scales, factors. Identical field experiments were conducted for 3 yr two sites in New York clay loam silt soils, Maryland sandy all involving replicated plots with...
Studies evaluating intensive tillage effects on the spatial variability and sample size requirements for assessing soil physical properties have been limited. Research to address this need was conducted a Bertie silt loam (fine-loamy, mixed, mesic Aquic Hapludult) at Wye Education Center near Mills, Maryland. The field subsoiled twice 38-cm depth, chisel plowed 20-cm disked 15-cm depth using controlled wheel traffic patterns. Rye grass (Secale cereale L.) planted in October 1987. Undisturbed...
ABSTRACT Modern agriculture uses large amounts of organic and inorganic nutrients to optimize productivity. Excessive nutrient applications sometime lead adverse effects on the environment human health. Precision is evolving with objectives minimizing these by enabling farmers manage more efficiently while sustaining precious environmental resources. To develop a method that cotton, field experiment involving three sources rates nitrogen without nitrification inhibitor was carried out in...
The Long-Term Agroecosystem Research (LTAR) network is a collaborative initiative funded by the U.S. Department of Agriculture, Agricultural Service, aimed at advancing sustainable, resilient agriculture through coordinated research conducted on croplands, grazing lands, and integrated crop/livestock systems. Here we provide an overview LTAR network, highlighting its vision, mission, initiatives, recent activities, future directions. Network-level critical for developing contextually...
Spatial variability and relationships between soil chemical properties, plant growth, nutrient uptake in an intensively tilled field have not been well documented. Our objective was to examine the spatial positional similarities properties determine sample size requirements for assessing these relationships. The research conducted on a Bertie silt loam (fine-loamy, mixed, mesic Aquic Hapludult) near Wye Research Education Center at Mills, Maryland. Tillage-related operations are provided...
Abstract The U.S. Department of Agriculture‐Agricultural Research Service's (ARS) Experimental Watershed Network grew from Dust Bowl era efforts the Soil Conservation Service in mid‐1930s with establishment small experimental watersheds. In 1950s, five watershed research centers intensively instrumented watersheds at scale 100 to 700 km 2 were established. Primary network objectives quantify on‐site and downstream effects conservation practices develop rainfall‐runoff relationships for...
After the first decade of CEAP, results indicated increased adoption minimum soil disturbance technologies and winter cover crops, a renewed emphasis on riparian corridors.This article builds these previous efforts introduces research papers feature in special issue that focuses findings ARS Benchmark other CEAP watersheds during 15 years watershed assessments.This also presents brief synthesis impacts, mainly NIFA-CEAP watersheds, highlights some key CEAP-developed technologies.The paper...
A bird survey was conducted in the Majang Forest Biosphere Reserve, Ethiopia, from February 2019 to December 2023, covering both wet and dry seasons. The study aimed assess species diversity habitat preferences across forest, grassland, wetland ecosystems using stratified sampling. Point counts were used forests line transects grasslands wetlands, with observations made during morning late afternoon hours. total of 205 45 families recorded; 63 habitat-specific, 184 occurred two habitats, 71...
Water and sediment transport redistribution around drainage ways are major riparian zone processes that affect soil chemistry water quality of watersheds. This is more so for urbanized watersheds generate runoff sediments which end up in the ways. study was done to evaluate pedogeomorphic variability Aldridge Creek Watershed Alabama, assess its impact on properties watershed. Sampling locations along creek were subdivided into five stream sites geo-referenced. Soil samples from buffers...
Abstract Intercropping of legumes with non-legumes is an ancient crop production method used to improve quality and dry matter (DM) yields forage grain, control weeds. However, there little information regarding intercropping at high latitudes. The objectives this field study were evaluate performance (1) sole cropped oat (Avena sativa L.) (cultivars Toral Calibre) pea (Pisum sativum Carneval Orb) their intercrop combinations, (2) inter- sole-crop responses different cropping systems studied...
The southeastern United States is an economically important agricultural region, yet its role in the regional C budget not fully understood. There concern that climate change, particularly altered precipitation patterns, may induce a shift how crops exchange CO 2 with atmosphere. This study examined seasonal and interannual variation net ecosystem (NEE) of winter wheat cover crop ( Triticum aestivum L.) soybean [ Glycine max (L.) Merr.] using eddy covariance (EC) method. was conducted at...
A ground-based experiment in passive microwave remote sensing of soil moisture was conducted Huntsville, AL, from July 1-14, 1996. The goal the to evaluate overall performance an empirically-based retrieval algorithm at S-band and L-band under a different set conditions characterize site-specific accuracy inherent within technique. With high temporal frequency observations L-band, authors were able observe large scale changes following irrigation rainfall events, as well diurnal behavior...
Manureshed management guides the sustainable use of manure resources by matching areas crop demand (nutrient sinks) with generating livestock sources). A better understanding impacts manureshed on water quality within sensitive watersheds is needed. We quantified potential benefits manureshed-oriented through scenario-based analyses in Susquehanna River Basin (SRB) using Soil and Water Assessment Tool. Five scenarios were developed compared a baseline "business-as-usual" scenario. The...
A reliable and low cost sensor that can measure soil moisture at or near the surface is currently not available. The objectives of this study were: (i) to evaluate possibility modifying an impedance probe (IP) content a very shallow depth (2–5 cm); (ii) compare values obtained using IP traditional gravimetric method. research was conducted Winfred A. Thomas Agricultural Research Station (WTARS) Hazel Green, Alabama. standard capable measuring 6-cm modified 2-, 3-, 5-cm depths. Using site...
AccuPAR, which is a relatively new instrument for estimating leaf area index (LAI) by measuring light interception, has wide distribution but only limited independent evaluation of its accuracy. The objective this study was to evaluate the accuracy AccuPAR LAI cotton ( Gossypium hirsutum L.) planted on different row spacings. Cotton measured nondestructively with and destructively taking plant samples three four times during each growing season in 2002 2003 research conducted at locations...
Bioaccumulation and entry of trace elements from soil into the food chain have made trace-elements major environmental pollutants. The main objective this investigation was to study impact mixing native agricultural with municipal sewage sludge (SS) or SS mixed yard waste (SS+YW) compost on total concentration in soil, metals available plants, mobility peppers melon fruits. Regardless treatment, average concentrations Ni, Cd, Pb, Cr, Cu, Zn, Mo fruits were 5.2, 0.7, 3.9, 0.9, 34.3, 96.1,...
Abstract The vision of the Long Term Agroecosystem Research (LTAR) network is to enable multi‐decadal, trans‐disciplinary, and cross‐location science ensure long‐term sustainability U.S. agriculture. LTAR's primary goals are to: (1) Intensify agricultural productivity, (2) Improve ecosystem services related production, (3) rural prosperity. LTAR includes 18 locations (sites). It 10 existing hydrologic observatories from Agricultural Service‐Experimental Watershed Network (ARS‐EWN) that were...