Dr. Terry A. Howell, P.E.
Research Leader (Agricultural Engineer)
(806) 356-5746
terry.howell@ars.usda.gov
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RESEARCH INTERESTS
Efficient use of water in irrigated agriculture:
- Sprinkler irrigation (center pivots, LEPA, spray heads, chemigation)
- Microirrigation (surface drip and subsurface drip irrigation of row crops)
- Evapotranspiration (energy balance, water balance)
- Lysimeters
- Irrigation Scheduling (models, water management)
- Crop Growth Models (yield, development, ET, etc.)
- Micrometeorology
- Weather Networks
- Water Quality (drainage, erosion from irrigated lands)
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Dr. Susan O'Shaughnessy
Agricultural Enginerr
(806) 356-5770
susan.oshaughnessy@ars.usda.gov |
RESEARCH INTERESTS
Efficient use of water in irrigated agriculture:
- Center Pivot Automation
- Precision Irrigation Feedback and Control
- Time-Temperature_Threshold (TTT) Method of Irrigation Scheduling
- Canopy Temperature Based Water Stress Indicies
- Irrigation efficiency
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Dr. R. Louis Baumhardt
Soil Scientist
(806) 356-5766
r.louis.baumhardt@ars.usda.gov |
RESEARCH INTERESTS
Efficient use of water in dryland agriculture:
- Residue Management for Soil and Water Conservation
- Dryland Crop Rotations and Sequences
- Integrated Livestock and Row Crop Production Systems
- Computer Crop Growth Modeling
- Rain Infiltration and Field Hydrology
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Dr. Paul D. Colaizzi
Agricultural Engineer
(806) 356-5763
paul.colaizzi@ars.usda.gov
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RESEARCH INTERESTS
Efficient use of water in irrigated agriculture:
- Remote sensing (regional, farm, and site-specific crop management)
- Evapotranspiration (energy balance, water balance)
- Irrigation scheduling (models, water management)
- Lysimeters
- Subsurface drip irrigation
- Mechanical-move irrigation systems
- Site specific irrigation system design for precision agriculture
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Karen S. Copeland
Soil Scientist
(806) 356-5735
karen.copeland@ars.usda.gov |
RESEARCH INTERESTS
Efficient use of water in irrigated agriculture:
- Evapotranspiration (energy balance, water balance)
- Lysimeters
- Irrigation Scheduling (models, water management)
- Weather Networks
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Donald A. Dusek
Collaborator (Agronomist)
(806) 356-5747
don.dusek@ars.usda.gov |
RESEARCH INTERESTS
Efficient use of water in irrigated agriculture:
- Sprinkler irrigation (center pivots, LEPA, spray heads)
- Surface Irrigation Management (deficit irrigation)
- Evapotranspiration (energy balance, water balance)
- Remote Sensing
- Lysimeters
- Irrigation Scheduling (models, water management)
- Weather Networks
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Dr. Steven R. Evett
Soil Scientist
(806) 356-5775
steve.evett@ars.usda.gov
| RESEARCH INTERESTS Publication list
Efficient use of water in irrigated agriculture:
- Energy and Water Balances and Fluxes in the Soil-Plant-Atmosphere Continuum
- Irrigation Effects on Surface Energy Balance and Evaporative Losses (Sprinkler and Microirrigation)
- Soil Physical Property Effects on Plant Water Use
- Irrigation Scheduling
- Lysimeters for Measurement of ET and Water Quality
- Irrigation Scheduling (models, water management)
- Soil Water Measurement Methods (time domain reflectometry, neutron scattering, frequency domain, coring, etc.)
- Weather Networks
- Soil Physical Property Measurement Methods (tension and positive head infiltrometry, desorption methods)
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Dr. Robert C. Schwartz
Soil Scientist
(806) 356-5762
robert.schwart@ars.usda.gov |
RESEARCH INTERESTS
Efficient use of water and nutrients in dryland agriculture:
- Influence of soil structure on water flow and solute transport
- Methods for the measurement of soil hydraulic properties
- Influence of soil physical properties on infiltration and water balance
- Nutrient management strategies for land application of stockpiled manure to dryland crops
- Phosphorous loading and transport on agricultural soils
- Influence of tillage and cropping systems on soil properties
- Use of the numerical method of lines to solve water, heat, and solute transport PDE's
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Dr. Judy A. Tolk
Plant Physiologist
(806) 356-5736
judy.tolk@ars.usda.gov
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RESEARCH INTERESTS
Efficient use of water in irrigated agriculture:
- Plant Response to Water Stress
- Plant-Soil-Water Interactions
- Plant-Water Relations Measurements (transpiration, photosynthesis, leaf water relations)
- Evapotranspiration Partitioning (evaporation, E, and transpiration, T)
- Lysimeters for Measurement of ET
- Micrometeorological Measurements
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Dr. Jose L. Chavez
Agricultural Engineer
(806) 356-5704
jose.chavez@ars.usda.gov
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RESEARCH INTERESTS
Efficient use of water in irrigated and dryland agriculture:
- Improvement of agricultural water management
- Regional evapotranspiration (energy balance)
- Remote sensing and GIS applications for efficient water management
- Irrigation systems efficiency
- Precision irrigation (site-specific irrigation)
- Stream flow prediction
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Dr. Prasanna Gowda
Agricultural Engineer (806) 356-5730
prasanna.gowda@ars.usda.gov
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RESEARCH INTERESTS
Efficient use of water in irrigated and dryland agriculture:
- Hydrologic Modeling (surface and ground water)
- Regional Water Use Budget
- Evapotranspiration (ET)
- GIS and Remote sensing (Rainfall estimation, ET and Crop Residue Cover Mapping)
- Crop Residue Management for Soil and Water Conservation
- Water Quality (Drainage, soil and nutrient losses)
- Precision Farming
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