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College of Agricultural Sciences Personnel Profile
Personnel Photo of Jay M Ham
Jay M Ham
Professor
Soil and Crop Sciences
College of Agricultural Sciences

Plant Sciences Building, Room
Phone:
970-491-4112
Education:
  • Ph D, Texas A & M; Soil Science
  • MS, Oklahoma State Univ; Agronomy
  • BS, Kansas State Univ; Agronomy

Jay Ham joined CSU in 2008. His research area is micrometeorology and environmental physics with a focus on Ag technology, Internet-of-Things (IoT) sensors, and water and air resources. He is the Executive Director of the Irrigation Innovation Consortium.

Galles, Karen, Ham, Jay M, Westover, Elin, Stratton, Joshua, Wagner, John Joseph, Engle, Terry E, Bryant, Tony Clay, Influence of Reduced Nitrogen Diets on Ammonia Emissions from Cattle Feedlot Pens Atmosphere 2 4 655-670

Li, Yi, Thompson, Tammy M, Van Damme, Martin, Chen, Xi, Benedict, Katherine B., Shao, Yixing, Day, Derek E, Boris, Alexandra Jeanne, Sullivan, Amy P, Ham, Jay M, Whitburn, Simon, Clarisse, Lieven, Coheur, Pierre-François, Collett Jr., Jeffrey L., Temporal and spatial variability of ammonia in urban and agricultural regions of northern Colorado, United States Atmospheric Chemistry and Physics 17 10 6197-6213

Lassman, William, Collett Jr, Jeff L, Ham, Jay M, Yalin, Azer P, Shonkwiler, Kira Brianne, Pierce, Jeff Robert, (2020) Exploring new methods of estimating deposition using atmospheric concentration measurements: A modeling case study of ammonia downwind of a feedlot Agricultural and Forest Meteorology 290

Bond, Tami Christine, Bosco-Lauth, Angela M, Farmer, Delphine Kasimira, Francisco, Paul W, Pierce, Jeff Robert, Fedak, Kristen Marie, Ham, Jay M, Jathar, Shantanu, VandeWoude, Sue, (2020) Quantifying proximity, confinement, and interventions in disease outbreaks: a decision support framework for air-transported pathogens medRxiv

Lassman, William, Collett, Jeffrey L., Ham, Jay M, Yalin, Azer P, Shonkwiler, Kira Brianne, Pierce, Jeff Robert, (2020) Exploring new methods of estimating deposition using atmospheric concentration measurements: A modeling case study of ammonia downwind of a feedlot Agricultural and Forest Meteorology 290 107989

Erwiha, Ghazala M., Ham, Jay M, Sukor, Arina, Wickham, Allison, Davis, Jessica G, (2020) Organic Fertilizer Source and Application Method Impact Ammonia Volatilization Communications in Soil Science and Plant Analysis 51 11 1469-1482

Hecobian Najjari, Arsineh, Clements, Andrea L, Shonkwiler, Kira Brianne, Zhou, Yong, Macdonald, Landan Patrick, Hilliard, Noel Gloria, Wells, Bradley L., Bibeau, Bryan, Ham, Jay M, Pierce, Jeff Robert, Collett Jr, Jeff L, (2019) Air Toxics and Other Volatile Organic Compound Emissions from Unconventional Oil and Gas Development ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS 6 12 720-726

Hecobian Najjari, Arsineh, Clements, Andrea L, Shonkwiler, Kira Brianne, Zhou, Yong, Macdonald, Landan Patrick, Hilliard, Noel Gloria, Wells, Bradley L, Bibeau, Bryan, Ham, Jay M, Pierce, Jeff Robert, others, , (2019) Air toxics and other volatile organic compound emissions from unconventional oil and gas development Environmental Science \& Technology Letters 6 12 720--726

Stratton, J. J., Ham, Jay M, Collett Jr, Jeff L, Benedict, Katie Beem, Borch, Thomas, (2019) Assessing the efficacy of nitrogen isotopes to distinguish Colorado Front Range ammonia sources affecting Rocky Mountain National Park ATMOSPHERIC ENVIRONMENT 215

Stratton, J. J., Ham, Jay M, Collett, Jeffrey L., Jr., , Benedict, Katie Beem, Borch, Thomas, (2019) Assessing the efficacy of nitrogen isotopes to distinguish Colorado Front Range ammonia sources affecting Rocky Mountain National Park ATMOSPHERIC ENVIRONMENT 215

Pina, Aaron J, Schumacher, Russ Stanley, Denning, Scott Scott, Faulkner, William B., Baron, Jill S, Ham, Jay M, Ojima, Dennis, Collett Jr, Jeff L, (2019) Reducing Wet Ammonium Deposition in Rocky Mountain National Park: the Development and Evaluation of A Pilot Early Warning System for Agricultural Operations in Eastern Colorado ENVIRONMENTAL MANAGEMENT 64 5 626-639

Hecobian Najjari, Arsineh, Clements, Andrea L, Shonkwiler, Kira Brianne, Zhou, Yong, Macdonald, Landan Patrick, Hilliard, Noel Gloria, Wells, Bradley L., Bibeau, Bryan, Ham, Jay M, Pierce, Jeff Robert, Collett, Jeffrey L., (2019) Air Toxics and Other Volatile Organic Compound Emissions from Unconventional Oil and Gas Development Environmental Science & Technology Letters 6 12 720-726

Piña, Aaron J., Schumacher, Russ Stanley, Denning, A. Scott, Faulkner, William B., Baron, Jill S, Ham, Jay M, Ojima, Dennis, Collett, Jeffrey L., (2019) Reducing Wet Ammonium Deposition in Rocky Mountain National Park: the Development and Evaluation of A Pilot Early Warning System for Agricultural Operations in Eastern Colorado Environmental Management 64 5 626-639

Stratton, J.J., Ham, Jay M, Collett, Jeffrey L., Benedict, Katie Beem, Borch, Thomas, (2019) Assessing the efficacy of nitrogen isotopes to distinguish Colorado Front Range ammonia sources affecting Rocky Mountain National Park Atmospheric Environment 215 116881

Santos, Eduardo, Ham, Jay M, Wagner-Riddle, Claudia, (2018) AFM special issue – Greenhouse gas and ammonia emissions from livestock production Agricultural and Forest Meteorology 258 1-2

Shonkwiler, Kira Brianne, Ham, Jay M, (2018) Ammonia emissions from a beef feedlot: Comparison of inverse modeling techniques using long-path and point measurements of fenceline NH3 Agricultural and Forest Meteorology 258 29-42

Stratton, Joshua J., Ham, Jay M, Borch, Thomas, (2018) Ammonia Emissions from Subalpine Forest and Mountain Grassland Soils in Rocky Mountain National Park Journal of Environmental Quality 47 4 778-785

Stratton, Joshua, Ham, Jay M, Borch, Thomas, (2018) Ammonia Emissions from Sub-Alpine Forest and Mountain Grassland Soils in Rocky Mountain National Park Journal of Environmental Quality 47 778–785

von Fischer, Joseph C., , Cooley, Daniel Stuart, Chamberlain, Sam, Gaylord, Adam Joseph, Griebenow, Claire J., Hamburg, Steven P., Salo, Jessica, Schumacher, Russ Stanley, Theobald, David, Ham, Jay M, (2017) Rapid, Vehicle-Based Identification of Location and Magnitude of Urban Natural Gas Pipeline Leaks ENVIRONMENTAL SCIENCE & TECHNOLOGY 51 7 4091-4099

von Fischer, Joe Charles, Cooley, Daniel Stuart, Chamberlain, Sam, Gaylord, Adam Joseph, Griebenow, Claire J., Hamburg, Steven P., Salo, Jessica, Schumacher, Russ Stanley, Theobald, David, Ham, Jay M, (2017) Rapid, Vehicle-Based Identification of Location and Magnitude of Urban Natural Gas Pipeline Leaks ENVIRONMENTAL SCIENCE & TECHNOLOGY 51 7 4091-4099

von Fischer, Joe Charles, Cooley, Daniel Stuart, Chamberlain, Sam, Gaylord, Adam, Griebenow, Claire J., Hamburg, Steven P., Salo, Jessica, Schumacher, Russ Stanley, Theobald, David, Ham, Jay M, (2017) Rapid, Vehicle-Based Identification of Location and Magnitude of Urban Natural Gas Pipeline Leaks ENVIRONMENTAL SCIENCE & TECHNOLOGY 51 7 4091-4099

Li, Yi, Thompson, Tammy M, Van Damme, Martin, , Chen, Xi, Benedict, Katie Beem, Shao, Yixing, Day, Derek E, Boris, Alexandra Jeanne, Sullivan, Amy P, Ham, Jay M, Whitburn, Simon, Clarisse, Lieven, Coheur, Pierre-Francois, Collett Jr, Jeff L, (2017) Temporal and spatial variability of ammonia in urban and agricultural regions of northern Colorado, United States ATMOSPHERIC CHEMISTRY AND PHYSICS 17 10 6197-6213

Miner, Grace Lloyd, Ham, Jay M, Kluitenberg, Gerard J., (2017) A heat-pulse method for measuring sap flow in corn and sunflower using 3D-printed sensor bodies and low-cost electronics Agricultural and Forest Meteorology 246 86-97

Shonkwiler, Kira, Ham, Jay M, (2017) Ammonia emissions from a beef feedlot: Comparison of inverse modeling techniques using long-path and point measurements of fenceline NH3 Agricultural and Forest Meterology

Ham, Jay M, Shonkwiler, Kira Brianne, Comparison of inverse modeling techniques using long-path and point measurements of fenceline NH3 Agricultural and Forest Meteorology 258 29-42

Peterson, K. W., Bremer, D. J., Shonkwiler, Kira Brianne, Ham, Jay M, (2017) Measurement of Evapotranspiration in Turfgrass: A Comparison of Techniques Agronomy Journal 109 5 2190-2198

Miner, Grace L, Ham, Jay M, Kluitenberg, Gerard E, (2017) A Heat-Pulse Method for Measuring Sap Flow in Corn and Sunflower using 3D-printed Gauges and Low-cost Electronics Agric. Forest Meteorology 246 86-97

Peterson, K W, Bremer, D J, Shonkwiler, Kira B, Ham, Jay M, (2017) Measurement of Evapotranspiration in Turfgrass: A Comparison of Techniques Agronomy Journal 109 5 2190-2198

von Fischer, Joseph C., Cooley, Daniel Stuart, Chamberlain, Sam, Gaylord, Adam Joseph, Griebenow, Claire J., Hamburg, Steven P., Salo, Jessica, Schumacher, Russ Stanley, Theobald, David, Ham, Jay M, (2017) Rapid, Vehicle-Based Identification of Location and Magnitude of Urban Natural Gas Pipeline Leaks Environmental Science & Technology 51 7 4091-4099

Hengen, Tyler J., Sieverding, Heidi L., Cole, Noel A., Ham, Jay M, Stone, James J., (2016) Eco-Efficiency Model for Evaluating Feedlot Rations in the Great Plains, United States Journal of Environmental Quality 45 4 1234-1242

Hengen, Tyler, Sieverding, Heidi, Cole, Andy, Ham, Jay, Stone, James, (2016) Eco-Efficiency Model for Evaluating Feedlot Rations in the Great Plains, United States Journal of Environmental Quality 45 4:1234-42 1234-42

Sun, Kang, Tao, Lei, Miller, David J., Zondlo, Mark A., Shonkwiler, Kira Brianne, Nash, Christina Marie, Ham, Jay M, (2015) Open-path eddy covariance measurements of ammonia fluxes from a beef cattle feedlot Agricultural and Forest Meteorology 213 193-202

Saseendran, S.A., Ahuja, Lajpat, Ma, Liwang, Trout, Thomas J., McMaster, Gregory S., Nielsen, David C., Ham, Jay M, Andales, Allan A, Halvorson, Ardel D., Chávez, José L., Fang, Quan-Xiao, (2015) Developing and normalizing average corn crop water production functions across years and locations using a system model Agricultural Water Management 157 65-77

Saseendran, S.A., Trout, T.J., Ahuja, L.R., Ma, Liwang, McMaster, G.S., Nielsen, D.C., Andales, A.A., Chávez, J.L., Ham, Jay M, (2015) Quantifying crop water stress factors from soil water measurements in a limited irrigation experiment Agricultural Systems 137 191-205

Sun, Kang, (2015) Open-path eddy covariance measurements of ammonia fluxes from a beef cattle feedlot Agric. Forest Meteorology 213 193-202

Saseendran, , Ahuja, Lajpat R, Ma, Liwang, Trout, Thomas J, McMaster, Gregory S, Nielsen, David C, Ham, Jay M, Andales, Allan A, Halvorson, Ardel A, Chavez, Jose L, Fang, Quanxiao, (2015) Developing and normalizing average corn crop water production functions across years and locations using a system model Agricultural Water Management 157 65-77

Saseendran, , Trout, Thomas J, Ahuja, Lajpat R, Ma, Liwang, McMaster, Gregory S, Nielsen, David C., Andales, Allan A, Chavez, Jose L, Ham, Jay M, (2015) Quantifying crop water stress factors from soil water measurements in a limited irrigation experiment Agricultural Systems 137 191-205

Saseendran, , Ahuja, Lajpat R., Ma, Liwang, Nielsen, David C., Trout, Thomas J., Andales, Allan A, Chavez, Jose L., Ham, Jay M, (2014) Enhancing the water stress factors for simulation of corn in RZWQM2 Agronomy Journal 106 1 81-94

Murphy, John, Ham, Jay M, Owensby, Clenton, (2014) Design and Testing of a Novel Gas Exchange Chamber Academic Research Journal of Agricultural Science and Research 2 3 pp. 34-46

Saseendran, S.A., Ahuja, Lajpat, Ma, Liwang, Nielsen, D. C., Trout, Tom, Andales, Allan A, Chávez, J. L., Ham, Jay M, (2014) Enhancing the Water Stress Factors for Simulation of Corn in RZWQM2 Agronomy Journal 106 1 81-94

Anapalli, Saseendran S, Ahuja, Lajpat R, Ma, Liwang, Nielsen, David C, Trout, Thomas J, Andales, Allan A, Chavez, Jose L, Ham, Jay M, (2013) Enhancing the water stress factors for simulation of corn in RZWQM2 Agronomy Journal 106 1 81-94

Parker, David, Ham, Jay M, Woodbury, Bryan, Cai, Lingshuang, Spiehs, Mindy, Rhoades, Marty, Trabue, Steve, Casey, Ken, Todd, Rick, Cole, Andy, (2013) Standardization of flux chamber and wind tunnel flux measurements for quantifying volatile organic compound and ammonia emissions from area sources at animal feeding operations Atmospheric Environment 66 72-83

(2012) "Arduino-based control system for measuring ammonia in air using conditionally-deployed diffusive samplers" Poster H11I-1286 American Geophysical Union Fall Meeting San Francisco, CA December

(2012) "Estimating Ammonia Emissions from a Dairy Using Robotic Diffusive Samplers and Inverse Modeling" Paper No: 121337380 ASABE Annual International Meeting Dallas, Texas July 29 – August 1

(2012) "Estimating ammonia fluxes from livestock operations using a network of conditionally-deployed diffusive samplers and inverse modeling" 30th AMS Conference on Agricultural and Forest Meteorology 29 May-1 June, Boston, MA

(2012) "Estimating Emissions of Ammonia and Methane from an Anaerobic Livestock Lagoon Using Micrometeorological Methods and Inverse Modeling" Poster B51F-0631 American Geophysical Union Fall Meeting San Francisco, CA December

(2012) "Identifying ammonia hotspots on a Colorado dairy using conditional passive samplers and inverse modeling" # W244 ADSA-AMPA-ASAS-CSAS-WSASAS Joint Meeting July 15-27 Phoenix, AZ

(2012) "Measuring methane fluxes from confined livestock operations using open-path eddy covariance: a challenging opportunity" 30th AMS Conference on Agricultural and Forest Meteorology 29 May-1 June, Boston, MA

(2012) Standardization of flux chamber and wind tunnel flux measurements for quantifying volatile organic compound and ammonia emissions from area sources at animal feeding operations Atmospheric Environment 66 72-83

(2011) "Assessing theAbility of Nitrogen Isotopes to Distinguish Ammonia Sources Affecting Rocky Mountain National Park" American Geophysical Union Fall Meetings San Francisco, CA

(2011) "Conditional Sampling of Ammonia Using Robotic Diffusive Samplers" American Geophysical Union Fall Meetings San Francisco, CA

(2011) Influenceof Reduced Nitrogen Diets on Ammonia Emissionsfrom Cattle Feedlot Pens Atmosphere 2 4 655-670

Nippert, Jesse B, Ocheltree, Troy W, Skibbe, Adam M, Kangas, Laura C, Ham, Jay M, Arnold, Kira B Shonkwiler, Brunsell, Nathaniel A, (2011) Linking plant growth responses across topographic gradients in tallgrass prairie Oecologia 166 4 1131–1142

(2011) Linking plant growth responsesacross topographic gradients in tallgrass prairie Oecologia, DOI 10.1007/s00442-011-1948-6

(2011) "Measuring Evapotranspiration in Urban IrrigatedLawns in Two Kansas Cities" American Geophysical Union Fall Meetings San Francisco, CA

(2011) "Measuring Methane Emissions From LivestockOperations Using Open-Path Eddy Covariance" American Soc Agronomy Annual Meetings San Antonio, TX

(2011) Validating remotely sensed land surface fluxes inheterogeneous terrain with large aperture scintillometry International Journal of Remote Sensing 32 21 6273-6293

Ham, Jay M, Williams, Christina, Stratton, Joshua, Borch, Thomas, (2011) "Weather-based conditional sampling of ammonia near livestock operations using passive samplers" 242

(2011) "Weather-based Conditional Sampling of Ammonia NearLivestock Operations Using Passive Samplers" American Chemical Society Annual Meetings Denver, CO

(2011) "Weather-based Conditional Sampling ofAmmonia Using Robotic Diffusive Samplers" American Soc Agronomy Annual Meetings San Antonio, TX

Brunsell, N. A., Ham, Jay M, Arnold, K. A., (2011) Validating remotely sensed land surface fluxes in heterogeneous terrain with large aperture scintillometry International Journal of Remote Sensing 32 21 6295-6314

Nippert, Jesse B., Ocheltree, Troy W, Skibbe, Adam M., Kangas, Laura C., Ham, Jay M, Shonkwiler Arnold, Kira B., Brunsell, Nathaniel A., (2011) Linking plant growth responses across topographic gradients in tallgrass prairie Oecologia 166 4 1131-1142

(2010) "Influence of reduced N diets on ammonia emissions from cattle feedlot pens" International Symposium on Air Quality and Manure Management for Agriculture CD-Rom Proceedings of the 13-16 September 2010 Conference (DoubleTree Hotel, Dallas Texas) Publication date, 13 September 2010 ASABE Publication Number 711P0510cd

Galles, Karen, Stratton, J, Westover, E, Levin, Ezra John Thomas, Ham, Jay M, Borch, Thomas, Wagner, John Joseph, Kreidenweis, S, Collett Jr, Jeff L, (2010) Laboratory chamber system for measuring ammonia emissions from intact soil cores: studies of cattle feedlots and forest soils 29th Conference on Agricultural and Forest Meteorology

(2010) "Measuring and Modeling Ammonia Emissions from Cattle Feedlots: Can We Reduce Nitrogen Losses?" Proceedings of Great Plains Soil Fertility Conference Denver, CO March 2

(2010) "Modeling Ammonia Emissions from Cattle Feedlot Pens" International Symposium on Air Quality and Manure Management for Agriculture CD-Rom Proceedings of the 13-16 September 2010 Conference (DoubleTree Hotel, Dallas Texas) Publication date, 13 September 2010 ASABE Publication Number 711P0510cd

(2010) Net Carbon Fluxes Over Burned and Unburned Native Tallgrass Prairie Rangeland Ecol Manag 63 72-81

Bremer, Dale J., Ham, Jay M, (2010) Net Carbon Fluxes Over Burned and Unburned Native Tallgrass Prairie Rangeland Ecology & Management 63 1 72-81

(2009) Adaptation of a speciation sampling cartridge for measuring ammonia flux from cattle feedlots using relaxed eddy accumulation Atmos Environ 43 1753-1759

(2009) Measuring Seepage from Waste Lagoons and Earthen Basins with an Overnight Water Balance Test T Asabe 52 835-844

(2009) Nutrient Accumulation below Cattle Feedlot Pens in Kansas J Environ Qual 38 909-918

Vaillant, Grace C., Pierzynski, Gary M., Ham, Jay M, DeRouchey, Joel, (2009) Nutrient Accumulation below Cattle Feedlot Pens in Kansas Journal of Environmental Quality 38 3 909-918

Baum, K.A., Ham, J.M., (2009) Adaptation of a speciation sampling cartridge for measuring ammonia flux from cattle feedlots using relaxed eddy accumulation Atmospheric Environment 43 10 1753-1759

(2008) Assessing the multi-resolution information content of remotely sensed variables and elevation for evapotranspiration in a tall-grass prairie environment Remote Sens Environ 112 2977-2987

(2008) Surface boundary layer of cattle feedlots Agr Forest Meteorol 148 1882-1893

(2008) Water balance of a stock-watering pond in the Flint Hills of Kansas Rangeland Ecol Manag 61 329-338

Baum, K.A., Ham, J.M., Brunsell, N.A., Coyne, P.I., (2008) Surface boundary layer of cattle feedlots: Implications for air emissions measurement Agricultural and Forest Meteorology 148 11 1882-1893

Brunsell, N.A., Ham, J.M., Owensby, C.E., (2008) Assessing the multi-resolution information content of remotely sensed variables and elevation for evapotranspiration in a tall-grass prairie environment Remote Sensing of Environment 112 6 2977-2987

Duesterhaus, J.L., Ham, J.M., Owensby, C.E., Murphy, J.T., (2008) Water Balance of a Stock-Watering Pond in the Flint Hills of Kansas Rangeland Ecology & Management 61 3 329-338

(2007) "Measuring Ammonia Fluxes from Cattle Feedlots using Time-averaged Relaxed Eddy Accumulation" International Symposium on Air Quality and Waste Management For Agriculture Broomfield, Colorado American Society of Agricultural and Biological Engineers

(2007) "Measuring the Seepage Rate from Lagoons Using an Overnight Water Balance Test" International Symposium on Air Quality and Waste Management For Agriculture Broomfield, Colorado American Society of Agricultural and Biological Engineers

(2006) Evaluation of MODIS NPP and GPP products across multiple biomes Remote Sens Environ 102 282-292

(2006) Fluxes of CO2 from grazed and ungrazed tallgrass prairie Rangeland Ecol Manag 59 111-127

(2006) Regional CO2 fluxes inferred from mixing ratio measurements Tellus B 58 523-536

Lai, Chun-Ta, Riley, William, Owensby, Clenton, Ham, Jay M, Schauer, Andrew, Ehleringer, James R., (2006) Seasonal and interannual variations of carbon and oxygen isotopes of respired CO2in a tallgrass prairie: Measurements and modeling results from 3 years with contrasting water availability Journal of Geophysical Research 111 D8

Turner, David P., Ritts, William D., Cohen, Warren B., Gower, Stith T., Running, Steve W., Zhao, Maosheng, Costa, Marcos H., Kirschbaum, Al A., Ham, Jay M, Saleska, Scott R., Ahl, Douglas E., (2006) Evaluation of MODIS NPP and GPP products across multiple biomes Remote Sensing of Environment 102 3-4 282-292

Owensby, Clenton E., Ham, Jay M, Auen, Lisa M., (2006) Fluxes of CO2 From Grazed and Ungrazed Tallgrass Prairie Rangeland Ecology & Management 59 2 111-127

Lai, Chun-Ta, Schauer, Andrew J., Owensby, Clenton, Ham, Jay M, Helliker, Brent, Tans, Pieter P., Ehleringer, James R., (2006) Regional CO2 fluxes inferred from mixing ratio measurements: estimates from flask air samples in central Kansas, USA Tellus B: Chemical and Physical Meteorology 58 5 523-536

(2005) "Evaluating Seepage Losses and Liner Performance at Animal-Waste Lagoons Using Water Balance Methods" L Reddi (ed) Animal Waste Containment in Lagoons ASCE Manual and Report #105 Am Soc Civil Engineers, Reston, VA 75-101

(2005) Lagoon-biogas emissions and carbon balance estimates of a swine production facility J Environ Qual 34 198-206

(2005) Measurement and partitioning of in situ carbon dioxide fluxes in turfgrasses using a pressurized chamber Agron J 97 627-632

(2005) Movement of lagoon-liquor constituents below four animal-waste lagoons J Environ Qual 34 1234-1242

(2005) Response to "Comments on 'On the construction and calibration of dual-probe heat capacity sensors" Soil Sci Soc Am J 69 1666-1667

(2005) "Useful equations and tables in micrometeorology" Hatfield, JL, and Baker, JM (eds) Micrometeorology in Agricultural Systems Agronomy Monograph No 17 American Society of Agronomy, Madison, WI

Phillips, Nathan G., Salvucci, Guido D., Pettijohn, Justin C., (2005) Comments on “On the Construction and Calibration of Dual-Probe Heat Capacity Sensors” Soil Science Society of America Journal 69 5 1666-1666

DeSutter, Tom M., Pierzynski, Gary M., Ham, Jay M, (2005) Movement of Lagoon-Liquor Constituents below Four Animal-Waste Lagoons Journal of Environmental Quality 34 4 1234-1242

Bremer, Dale J., Ham, Jay M, (2005) MEASUREMENT AND PARTITIONING OF IN SITU CARBON DIOXIDE FLUXES IN TURFGRASSES USING A PRESSURIZED CHAMBER Agronomy Journal 97 2 627-632

(2004) Improved theory for calculating sap flow with the heat pulse method Agr Forest Meteorol 126 169-173

(2004) On the construction and calibration of dual-probe heat capacity sensors Soil Sci Soc Am J 68 1185-1190

Kluitenberg, Gerard J., Ham, Jay M, (2004) Improved theory for calculating sap flow with the heat pulse method Agricultural and Forest Meteorology 126 1-2 169-173

Ham, Jay M, Benson, E. J., (2004) On the Construction and Calibration of Dual-Probe Heat Capacity Sensors Soil Science Society of America Journal 68 4 1185-1190

(2003) Experimental test of density and energy-balance corrections on carbon dioxide flux as measured using open-path eddy covariance Agron J 95 1393-1403

(2003) Field Evaluation of the Dual-Probe Heat-Pulse Method for Measuring Soil Water Content Vadose Zone J 2 552-560

(2003) Isotopic air sampling in a tallgrass prairie to partition net ecosystem CO2 exchange J Geophys Res-Atmos 108

Lai, Chun-Ta, (2003) Isotopic air sampling in a tallgrass prairie to partition net ecosystem CO2exchange Journal of Geophysical Research 108 D18

(2003) Laboratory Evaluation of the Dual-Probe Heat-Pulse Method for Measuring Soil Water Content Vadose Zone J 2 389-399

(2003) "Standards for measuring seepage from animal waste lagoons and manure storages" American Society of Agricultural Engineers Annual Meetings Las Vegas, NV Paper Number 034130

Ham, Jay M, Heilman, J. L., (2003) Experimental Test of Density and Energy-Balance Corrections on Carbon Dioxide Flux as Measured Using Open-Path Eddy Covariance Agronomy Journal 95 6 1393-1403

Heitman, J. L., Basinger, J. M., Kluitenberg, G. J., Ham, Jay M, Frank, J. M., Barnes, P. L., (2003) Field Evaluation of the Dual-Probe Heat-Pulse Method for Measuring Soil Water Content Vadose Zone Journal 2 4 552-560

Basinger, J. M., Kluitenberg, G. J., Ham, Jay M, Frank, J. M., Barnes, P. L., Kirkham, M. B., (2003) Laboratory Evaluation of the Dual-Probe Heat-Pulse Method for Measuring Soil Water Content Vadose Zone Journal 2 3 389-399

(2002) Measurement and modeling of soil CO2 flux in a temperate grassland under mowed and burned regimes Ecol Appl 12 1318-1328

(2002) Seasonal water balance of an Ozark hillslope Agr Water Manage 55 71-82

(2002) Seepage losses from animal waste lagoons T Asae 45 983-992

(2002) Uncertainty analysis of the water balance technique for measuring seepage from animal waste lagoons J Environ Qual 31 1370-1379

Bremer, Dale J., Ham, Jay M, (2002) MEASUREMENT AND MODELING OF SOIL CO2FLUX IN A TEMPERATE GRASSLAND UNDER MOWED AND BURNED REGIMES Ecological Applications 12 5 1318-1328

Ham, Jay M, (2002) Uncertainty Analysis of the Water Balance Technique for Measuring Seepage from Animal Waste Lagoons Journal of Environmental Quality 31 4 1370-1379

Sauer, T.J, Moore, P.A, Ham, J.M, Bland, W.L, Prueger, J.H, West, C.P, (2002) Seasonal water balance of an Ozark hillslope Agricultural Water Management 55 1 71-82

(2001) Evapotranspiration in a prairie ecosystem Agron J 93 338-348

Bremer, Dale J., Auen, Lisa M., Ham, Jay M, Owensby, Clenton E., (2001) Evapotranspiration in a Prairie Ecosystem Agronomy Journal 93 2 338-348

Adam, Neal R., Owensby, Clenton E., Ham, Jay M, (2000) Photosynthesis Research 65 2 121-129

Song, Youngseok, Kirkham, M. B., Ham, Jay M, Kluitenberg, G. J., (2000) Root-zone hydraulic lift evaluated with the dual-probe heat-pulse technique Soil Research 38 5 927

(2000) Root-zone hydraulic lift evaluated with the dual-probe heat-pulse technique Aust J Soil Res 38 927-935

(2000) The effect of CO2 enrichment on leaf photosynthetic rates and instantaneous water use efficiency of Andropogon gerardii in the tallgrass prairie Photosynth Res 65 121-129

(2000) Toward site-specific design standards for animal-waste lagoons J Environ Qual 29 1721-1732

Ham, Jay M, DeSutter, T. M., (2000) Toward Site‐Specific Design Standards for Animal‐Waste Lagoons: Protecting Ground Water Quality Journal of Environmental Quality 29 6 1721-1732

(1999) Biomass production and species composition change in a tallgrass prairie ecosystem after long-term exposure to elevated atmospheric CO2 Global Change Biol 5 497-506

(1999) Dual probe heat pulse technique for measuring soil water content and sunflower water uptake Soil Till Res 50 345-348

(1999) Effect of spring burning on the surface energy balance in a tallgrass prairie Agr Forest Meteorol 97 43-54

(1999) Elevated CO2 and leaf longevity in the C-4 grassland-dominant Andropogon gerardii Int J Plant Sci 160 1057-1061

(1999) Measurement resolution of the dual probe heat balance technique M Th van Genuchten, FJ Leij, and L Wu (eds) Proceedings of the international workshop characterization and measurement of the hydraulic properties of unsaturated soils Univ of California Press, Riverside, CA

(1999) Measuring evaporation and seepage losses from lagoons used to contain animal waste T Asae 42 1303-1312

(1999) Measuring sensible heat flux in plastic mulch culture with aerodynamic conductance sensors Agr Forest Meteorol 95 13-Jan

(1999) Seepage losses and nitrogen export from swine-waste lagoons J Environ Qual 28 1090-1099

Knapp, Alan Keith, Bargmann, Naomi, Maragni, Laura A., McAllister, Christine A., Bremer, Dale J., Ham, Jay M, Owensby, Clenton E., (1999) Elevated CO2 and Leaf Longevity in the C4 Grassland‐Dominant Andropogon gerardii International Journal of Plant Sciences 160 6 1057-1061

Bremer, Dale J, Ham, Jay M, (1999) Effect of spring burning on the surface energy balance in a tallgrass prairie Agricultural and Forest Meteorology 97 1 43-54

Ham, Jay M, DeSutter, Tom M., (1999) Seepage Losses and Nitrogen Export from Swine‐Waste Lagoons: A Water Balance Study Journal of Environmental Quality 28 4 1090-1099

Owensby, Clenton E., Ham, Jay. M., Knapp, Alan. K., Auen, Lisa. M., (1999) Biomass production and species composition change in a tallgrass prairie ecosystem after long‐term exposure to elevated atmospheric CO 2 Global Change Biology 5 5 497-506

Song, Yan, Kirkham, M.B, Ham, J.M, Kluitenberg, G.J, (1999) Dual probe heat pulse technique for measuring soil water content and sunflower water uptake Soil and Tillage Research 50 3-4 345-348

Tarara, Julie M., Ham, Jay M, (1999) Measuring sensible heat flux in plastic mulch culture with aerodynamic conductance sensors Agricultural and Forest Meteorology 95 1 1-13

(1998) "Dual probe heat-pulse technique for measuring water content of soil with sunflower" Proceedings of the International Congress of Soil Science Domaine de Limère, Ardon, France (Proceedings also published on CD ROM)

(1998) Fluxes of CO2 water vapor, and energy from a prairie ecosystem during the seasonal transition from carbon sink to carbon source Agr Forest Meteorol 89 14-Jan

(1998) Measuring soil water content under turfgrass using the dual-probe heat-pulse technique J Am Soc Hortic Sci 123 937-941

(1998) Responses of soil respiration to clipping and grazing in a tallgrass prairie J Environ Qual 27 1539-1548

Bremer, Dale J., Ham, Jay M, Owensby, Clenton E., Knapp, Alan Keith, (1998) Responses of Soil Respiration to Clipping and Grazing in a Tallgrass Prairie Journal of Environmental Quality 27 6 1539-1548

Song, Youngseok, Ham, J.M., Kirkham, M.B., Kluitenberg, G.J., (1998) Measuring Soil Water Content under Turfgrass Using the Dual-probe Heat-pulse Technique Journal of the American Society for Horticultural Science 123 5 937-941

Ham, Jay M, Knapp, Alan Keith, (1998) Fluxes of CO2, water vapor, and energy from a prairie ecosystem during the seasonal transition from carbon sink to carbon source Agricultural and Forest Meteorology 89 1 1-14

(1997) Measuring soil water content in the laboratory and field with dual-probe heat-capacity sensors Agron J 89 535-542

(1997) Photosynthetic gas exchange and water relation responses of three tallgrass prairie species to elevated carbon dioxide and moderate drought Int J Plant Sci 158 608-616

(1997) Water vapour fluxes and their impact under elevated CO2 in a C4-tall grass prairie Glob Change Biol 3 189-195

Hamerlynck, Erik P., McAllister, Christine A., Knapp, Alan Keith, Ham, Jay M, Owensby, Clenton E., (1997) Photosynthetic Gas Exchange and Water Relation Responses of Three Tallgrass Prairie Species to Elevated Carbon Dioxide and Moderate Drought International Journal of Plant Sciences 158 5 608-616

Tarara, Julie M., Ham, Jay M, (1997) Measuring Soil Water Content in the Laboratory and Field with Dual‐Probe Heat‐Capacity Sensors Agronomy Journal 89 4 535-542

OWENSBY, CLENTON, Ham, Jay M, Knapp, Alan Keith, BREMER, DALE, AUEN, LISA, (1997) Water vapour fluxes and their impact under elevated CO 2 in a C4‐tallgrass prairie Global Change Biology 3 3 189-195

(1996) A dual-heater gauge for measuring sap flow with an improved heat-balance method Agron J 88 149-155

(1996) Effect of elevated atmospheric carbon dioxide and open-top chambers on transpiration in a tallgrass prairie J Environ Qual 25 691-701

(1996) Responses in stomatal conductance to elevated CO2 in 12 grassland species that differ in growth form Vegetatio 125 31-41

(1996) Sap flow in wheat under free-air CO2 enrichment Plant Cell Environ 19 147-158

Bremer, Dale J., Ham, Jay M, Owensby, Clenton E., (1996) Effect of Elevated Atmospheric Carbon Dioxide and Open‐top Chambers on Transpiration in a Tallgrass Prairie Journal of Environmental Quality 25 4 691-701

Knapp, Alan Keith, Hamerlynck, Erik P., Ham, Jay M, Owensby, Clenton E., (1996) Responses in stomatal conductance to elevated CO2 in 12 grassland species that differ in growth form Vegetatio 125 1 31-41

Peressotti, Alessandro, Ham, Jay M, (1996) A Dual-Heater Gauge for Measuring Sap Flow with an Improved Heat-Balance Method Agronomy Journal 88 2 149-155

SENOCK, R. S., Ham, Jay M, LOUGHIN, T. M., KIMBALL, B. A., HUNSAKER, D. J., PINTER, P. J., WALL, G. W., Garcia, Rowen, LaMORTE, R. L., (1996) Sap flow in wheat under free-air CO2 enrichment Plant, Cell and Environment 19 2 147-158

(1995) "Ecosystem level responses of tallgrass prairie to elevated CO2" Global change and terrestrial ecosystems 6 responses to elevated CO2 Koerner, C and H Mooney (ed) Physiologie Ecology Series, Academic Press

(1995) Fluxes of Co2 and Water-Vapor from a Prairie Ecosystem Exposed to Ambient and Elevated Atmospheric Co2 Agr Forest Meteorol 77 73-93

(1995) Measurements of Water-Use by Prairie Grasses with Heat-Balance Sap Flow Gauges J Range Manage 48 150-158

Ham, Jay M, (1995) Fluxes of CO2 and water vapor from a prairie ecosystem exposed to ambient and elevated atmospheric CO2*1 Agricultural and Forest Meteorology 77 1-2 73-93

Senock, R. S., Ham, Jay M, (1995) Measurements of Water Use by Prairie Grasses with Heat Balance Sap Flow Gauges Journal of Range Management 48 2 150

(1994) An Evaluation of a Surface-Energy Balance Method for Partitioning Et Data into Plant and Soil Components for a Surface with Partial Canopy Cover Agr Forest Meteorol 67 253-267

(1994) Modeling the Effect of Mulch Optical-Properties and Mulch Soil Contact Resistance on Soil Heating under Plastic Mulch Culture Agr Forest Meteorol 71 403-424

Ham, Jay M, Kluitenberg, G.J., (1994) Modeling the effect of mulch optical properties and mulch-soil contact resistance on soil heating under plastic mulch culture Agricultural and Forest Meteorology 71 3-4 403-424

Massman, W.J., Ham, J.M., (1994) An evaluation of a surface energy balance method for partitioning ET data into plant and soil components for a surface with partial canopy cover Agricultural and Forest Meteorology 67 3-4 253-267

(1993) Biomass Production in a Tallgrass Prairie Ecosystem Exposed to Ambient and Elevated Co2 Ecol Appl 3 644-653

(1993) Error Analysis of the Heat Pulse Method for Measuring Soil Volumetric Heat-Capacity Soil Sci Soc Am J 57 1444-1451

(1993) Heat-Balance Sap Flow Gauge for Small-Diameter Stems Plant Cell Environ 16 593-601

(1993) Optical-Properties of Plastic Mulches Affect the Field Temperature Regime J Am Soc Hortic Sci 118 188-193

(1993) Positional Variation in the Soil Energy-Balance beneath a Row-Crop Canopy Agr Forest Meteorol 63 73-92

(1993) Technique for Measuring Air-Flow and Carbon-Dioxide Flux in Large, Open-Top Chambers J Environ Qual 22 759-766

(1993) Traversing Sensor Platform for Environmental Measurements Agron J 85 965-968

Owensby, Clenton E., Coyne, Patrick I., Ham, Jay M, Auen, Lisa M., Knapp, Alan Keith, (1993) Biomass Production in a Tallgrass Prairie Ecosystem Exposed to Ambient and Elevated CO"2 Ecological Applications 3 4 644-653

Kluitenberg, G. J., Ham, Jay M, Bristow, K. L., (1993) Error Analysis of the Heat Pulse Method for Measuring Soil Volumetric Heat Capacity Soil Science Society of America Journal 57 6 1444-1451

Ham, Jay M, Owensby, C. E., Coyne, P. I., (1993) Technique for Measuring Air Flow and Carbon Dioxide Flux in Large, Open-Top Chambers Journal of Environmental Quality 22 4 759-766

SENOCK, R. S., Ham, Jay M, (1993) Heat balance sap flow gauge for small diameter stems Plant, Cell and Environment 16 5 593-601

Ham, Jay M, Kluitenberg, G.J, (1993) Positional variation in the soil energy balance beneath a row-crop canopy Agricultural and Forest Meteorology 63 1-2 73-92

(1992) On the Measurement of Soil Surface-Temperature Soil Sci Soc Am J 56 370-377

Ham, Jay M, Senock, R. S., (1992) On the Measurement of Soil Surface Temperature Soil Science Society of America Journal 56 2 370-377

(1991) Aerodynamic and Surface Resistances Affecting Energy-Transport in a Sparse Crop Agr Forest Meteorol 53 267-284

(1991) Soil and Canopy Energy Balances of a Row Crop at Partial Cover Agron J 83 744-753

Ham, J.M., Heilman, J.L., (1991) Aerodynamic and surface resistances affecting energy transport in a sparse crop Agricultural and Forest Meteorology 53 4 267-284

(1990) Determination of Soil-Water Evaporation and Transpiration from Energy-Balance and Stem-Flow Measurements Agr Forest Meteorol 52 287-301

Ham, Jay M, Heilman, J.L., Lascano, R.J., (1990) Determination of soil water evaporation and transpiration from energy balance and stem flow measurements Agricultural and Forest Meteorology 52 3-4 287-301

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