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Exploitation of Spatial Information in High Resolution Digital Imagery for Leaf Area Index Mapping
- (Peer Reviewed Journal)
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Walthall, C.L., Pachepsky, Y., Dulaney, W.P., Timlin, D.J., Daughtry, C.S.T. 2007. Exploitation of spatial information in high resolution digital imagery to map leaf area index. Precision Agriculture. 8(6):311-326.
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Remote Sensing of Agronomic Parameters: Scientific Advances
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Hatfield, J.L., Gitelson, A.A., Schepers, J.S., Walthall, C.L. 2008. Remote Sensing of Agronomic Parameters: Scientific Advances. Agronomy Journal. 100:S117-S131.
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Radar Monitoring of Wetland Hydrology in An Agricultural Watershed: New Information for Improved Water Quality Mangement in the Choptank River Watershed, Maryland
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Lang, M.W., Walthall, C.L., Hively W.D. 2006. Radar monitoring of wetland hydrology in an agricultural watershed: New information for improved water quality management in the Choptank River Watershed, Maryland [abstract]. Soil and Water Conservation Society. p. 86.
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Detection of Illegal Cannabis Cultivation Using Remote Sensing
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Walthall, C.L., Daughtry, C.S., Vanderbilt, V., Pachepsky, L., Lydon, J., Erbe, E., Higgins, M., Bobbe, T. 2006. Detection of illegal cannabis cultivation using remote sensing. Proceedings of the International Geoscience and Remote Sensing Symposium, July 31-August 4, Denver, Colorado. 2006 CDROM.
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C-Band Radar Monitoring of Hydrology in Mid-Atlantic Coastal Plain Forests: Implication for Improved Water Quality Management in the Chesapeake Bay Watershed
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Lang, M.W., Walthall, C.L. 2006. C-Band radar monitoring of hydrology in Mid-Atlantic Coastal Plain Forests: Implication for improved water quality management in the Chesapeake Bay Watershed [abstract]. Abs. 19, BARC Poster Day.
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Using Radar to Map Hydrology in Mid-Atlantic Coastal Plain Forests: Implications for Improved Water Quality Management
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Lang, M.W., Walthall, C.L. 2006. Using radar to map hydrology in Mid-Atlantic Coastal Plain Forests: Implications for improved water qualtiy management [abstract]. Conservation Effects Assessment Project (CEAP) Annual Meeting. Available: http://www.nrcs.usda.gov/technical/nri/ceap/watersheds/2006meeting.html.
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Improving Global-Scale Land Cover Classifications with Multi-Directional View Angle Data and a Decision Tree Classifier
- (Peer Reviewed Journal)
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Brown de Colstoun, E., Walthall, C. 2006. Improving global-scale land cover classifications with multi-directional view-angle data and a decision tree classifier. Remote Sensing of Environment. 100:474-485.
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High-Resolution Multispectral Digital Photography Using Unmanned Airborne Vehicles
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Hunt, E.R., Walthall, C.L., Daughtry, C.S., Cavigelli, M.A., Fujikawa, S.J., Yoel, D.W., Ng, T.L., Tranchitella, M.C. 2006. High-resolution multispectral digital photograpy using unmanned airborne vehicles. In: Proceedings of the 20th Biennial Workshop on Aerial Photography, Videography and High Resolution Digital Imagery for Resource Assessment, October 4-6, 2005, Weslaco, Texas. 2006 CDROM.
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Characterizing Landscape Composition and Structure with Image Texture Parameters
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Walthall, C.L., Pachepsky, L., Daughtry, C.S. 2005. Characterizing landscape composition and structure with image texture parameters [abstract]. Abstracts from American Geophysical Union Fall Conference. 2005 CDROM.
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Agriculture Remote Sensing with Multispectral Digital Photography Using Unmanned Airborne Vehicles
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Hunt, E.R., Walthall, C.L., Daughtry, C.S., Fujikawa, S.J., Yoel, D., Khorrami, F., Tranchitella, M. 2005. Agriculture remote sensing with multispectral digital photography using unmanned airborne vehicles [abstract]. ASA-CSSA-SSSA Annual Meetings. 2005 CDROM.
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High Resolution Multispectral Digital Photography Using Unmanned Airborne Vehicles.
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Hunt, E.R., Walthall, C.L., Daughtry, C.S., Fujikawa, S.J., Yoel, D., Khorrami, F., Tranchitella, M. 2005. High resolution multispectral digital photography using unmanned airborne vehicles [abstract]. 20th Biennial workshop on Areal Photography, Videography, and High Resolution Digital Imagery for Resource Assessment. 2005 CDROM.
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Evaluation of Aerial Photography from Model Aircraft for Remote Sensing Crop Biomass and Nitrogen Status
- (Peer Reviewed Journal)
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Hunt, E.R., Cavigelli, M.A., Daughtry, C.S., McMurtrey, J.E., Walthall, C.L. 2005. Evaluation of aerial photography from model aircraft for remote sensing crop biomass and nitrogen status. Precision Agriculture. 6(4):359-378.
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Texture Analysis for Classification and Segmentation of Airborne Images of Plant Cover
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Walthall, C.L., Pachepsky, L., Daughtry, C.S. 2005. Texture analysis for classification and segmentation of airborne images of plant cover. In: Proceedings of the 2005 American Society for Photogrammetry and Remote Sensing Annual Conference, March 7-11, 2005, Baltimore, Maryland. I:180-191.
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Soybean Growth and Development Visualized with L-Systems Simulations: Effect of Temeratpure
- (Peer Reviewed Journal)
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Pachepsky, L., Kaul, M., Walthall, C., Lydon, J., Kong, H., Daughtry, C., 2005. Soybean growth and development visualized with L-systems simulations: Effects of temperature. International Journal of Biotronics. 33:31-47.
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Alternative Approaches for Estimating Leaf Area Index (Lai) from Remotely Sensed Satellite and Aircraft Imagery
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Walthall, C.L., Dulaney, W.P., Anderson, M., Norman, J., Fang, H., Liang, S., Timlin, D., Pachepsky, L. 2004. Alternative approaches for estimating leaf area index (LAI) from remotely sensed satellite and aircraft imagery. In: Proceedings of the SPIE International Symposium on Optical Science and Technology, August 2-6, 2004, Denver, Colorado. 5544: p. 241-255.
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Artificial Neural Networks for Corn and Soybean Yeld Prediction
- (Peer Reviewed Journal)
- (28-Jul-04)
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Analysis of Surrogate Indicators for Evidence of Subsurface Preferential Flow Pathways: Impact of Subsurface Preferential Flow on Variablility of Ndvi
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Walthall, C.L., Gish, T.J., Chinkuyu, A., Dulaney, W.P., Kaul, M.N., Daughtry, C.S. 2004. Analysis of surrogate indicators for evidence of subsurface preferential flow pathways: Impact of subsurface preferential flow on varibility of NDVI. In: Proceedings of the 2004 IEEE International Geoscience and Remote Sensing Symposium, September 20-24, 2004, Anchorage, Alaska. VI:3992-3995.
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A Comparison of Empirical and Neural Network Approaches for Estimating Corn and Soybean Leaf Area Index from Landsat Etm+ Imagery
- (Peer Reviewed Journal)
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Walthall, C., Dulaney, W., Anderson, M., Norman, J., Fang, H., Liang, S. 2004. A comparison of empirical and neural network approaches for estimating corn and soybean leaf area index from Landsat ETM+ imagery. Remote Sensing of the Environment. 92:465-474.
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Quantifying Impact of Hydrology on Corn Grain Yield Using Ground-Penetrating Radar
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Gish, T.J., Daughtry, C.S.T., Walthall, C.L., Kung. K. 2004. Qualifying impact of hydrology on corn grain yield using ground-penetrating radar. In: Proceedings 10th International Conference on Ground-penetrating Radar, June 21-24, 2004, Delft, The Netherlands. 2:493-496.
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Vegetation Water Content Mapping Using Landsat Data Derived Normalized Difference Water Index (Ndwi) for Corn and Soybean
- (Peer Reviewed Journal)
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Jackson, T., Chen, D., Cosh, M., Li, F., Anderson, M., Walthall, C., Doraiswamy, P., Hunt, E.R. 2004. Vegetation water content mapping using Landsat data normalized difference water index (NDWI) for corn and soybean. Remote Sensing of Environment. 92(4):475-482.
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Need and Feasibility of Applying L-System Models in Agricultural Crop Modeling
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Pachepsky, L., Kaul, M., Walthall, C., Daughtry, C., Lyndon, J. 2004. Need and feasibility of applying L-System models in agricultural crop modeling. In: Proceedings of Fractional 2004 Conference, April 3-8, 2004, Vancouver, Canada. p. 317-318.
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Remote Sensing in Boreas: Lessons Learned
- (Peer Reviewed Journal)
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Gamon, J., Huemmrich, K., Peddle, D., Chen, J., Fuentes, D., Hall, F., Kimball, J., Goetz, S., Gu, J., McDonald, K., Miller, J., Moghaddam, M., Rahman, A., Roujean, J.-L., Smith, E., Walthall, C.L., Zarco-Tejada, P., Hu, B., Fernandex, R., Cihlar, J. 2004. Remote sensing in BOREAS: Lessons learned. Remote Sensing of Environment. 89(20):139-162.
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Remote Sensing Crop Biomass Using Radio Controlled Model Aircraft
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Hunt, E.R., Cavigelli, M.A., Daughtry, C.L., Walthall, C.L. 2003. Remote sensing crop biomass using radio controlled model aircraft [abstract]. American Society of Agronomy Annual Meetings Abstracts [CDROM]. A03hunt827278-Poster.
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Soybean Growth and Development Visualized with L-System Simulations:effect of Temperature
- (Abstract)
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Pachepsky, L., Walthall, C.L., Kaul, M., Kong, H., Lyden, J., Daughtry, C.S. 2003. Soybean growth and development visualized with L-system simulations: Effect of temperature [CD-ROM]. Crop Science Society of America, Soil Science Society of America. Denver, Colorado: Agronomy Society of America.
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Wall - a Model of Leaf Transpiration: Analysis of Mechanisms and Visualization
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Pachepsky, Y.A., Walthall, C.L., Kaul, M., Daughtry, C.S. 2003. A model of transpiration: analysis of mechanisms and visualization [CD-ROM]. Crop Science Society of America, Soil Science Society of America. Denver, Colorado: Agronomy Society of America.
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Watershed-Scale Sensing of Subsurface Flow Pathways at Ope3 Site
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Gish, T.J., Walthall, C.L., Daughtry, C.S.T., Dulaney, W.P., McCarty, G.W. 2003. Watershed-scale sensing of subsurface flow pathways at OPE3 site. In: Proceedings of the First Interagency Conference on Research in the Watersheds, October 27-30, 2003, Benson, Arizona. p. 192-197.
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Yield Index and Remote Sensing to Confirm Watershed Subsurface Flow Pathways
- (Peer Reviewed Journal)
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Gish, T.J., Walthall, C.L., Daughtry, C.S., Kung, S.J.S. 2005. Yield index and remote sensing to confirm watershed subsurface flow pathways. Journal of Environmental Quality. 34:275-286.
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What Do We Know About the Spectral Signatures of Illegal Cannabis Cultivation?
- (Proceedings/Symposium)
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WALTHALL, C.L., DAUGHTRY, C.S., VANDERBILT, V., HIGGINS, M., BOBBE, T., LYDON, J., KAUL, M.N. 2003. WHAT DO WE KNOW ABOUT THE SPECTRAL SIGNATURES OF ILLEGAL CANNABIS CULTIVATION? PROCEEDINGS OF THE OFFICE OF NATIONAL DRUG CONTROL POLICY PROCEEDINGS.
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Watershed-Scale Surface and Sub-Surface Remote Sensing at the Ope3 Site
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Gish, T.J., Walthall, C.L., Daughtry, C.S., McCarty, G.W., Dulaney, W.P. 2003. Watershed-scale surface and sub-surface remote sensing at the OPE3 site. 1st Interagency Conference on Research in the Watershed.
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Statistical Comparison of Misr, Etm+ and Modis Land Surface Reflectances and Albedo Productions of the BARC Land Validation Core Site, Usa
- (Peer Reviewed Journal)
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Fang, H., Liang, S., Chen, M., Walthall, C.L., Daughtry, C.S. 2003. Statistical comparison of MISR, ETM+ and MODIS land surface reflectances and albedo production of the BARC land validation core site, USA. International Journal of Remote Sensing. 25(2):409-422.
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Estimation of Vegetation Water Content for Corn and Soybeans with a Normalized Difference Water Index (Ndwi) Using Landsay Thematic Mapper Data
- (Proceedings/Symposium)
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Chen, D., Jackson, T.J., Li, F., Cosh, M.H., Walthall, C.L., Anderson, M. 2003. Estimation of vegetation water content for corn and soybeans with a normalized difference water index (NDWI) using Landsat thermatic mapper data. International Geoscience and Remote Sensing Symposium Proceedings. IV:2853-2856.
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A Protocol for Differentiating Hydrologic Zones of Soil Moisture
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Gish, T.J., Walthall, C.L., Daughtry, C.S., Prueger, J.H. 2003. A Protocol for Differentiating Hydrologic Zones of Soil Moisture [CD-ROM]. Crop Science Society of America, Soil Science Society of America. Denver, Colorado: Agronomy Society of America.
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Using Subsurface Stratigraphy to Determine Subsurface Water Flow Pathways
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Gish, T.J., Daughtry, C.S., Walthall, C.L., McCarty, G.W., Angier, J. 2003. Using subsurface stratigraphy to determine subsurface water flow pathways [CD-ROM]. Crop Science Society of America, Soil Science Society of America. Denver, Colorado: Agronomy Society of America.
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Estimation of Land Surface Broadband Albedos and Leaf Area Index from Eo-1 Data and Validation
- (Peer Reviewed Journal)
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Liang, S., Fang, H., Kaul, M., Van Niel, T., Mc Vicar, T., Walthall, C.L., Daughtry, C.S., Huemmrich, F. 2003. Estimation of land surface broadband albedos and leaf area index from EO-I data and validation. IEEE Transactions on Geoscience and Remote Sensing. 41(6):1260-1267.
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Spectral Vegetation Index Relationships with Normalized Yield Monitor Data
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Walthall, C.L., Gish, T.J., Daughtry, C.S. 2003. Spectral vegetation index relationship with normalized yield monitor data [abstract]. In: Proceedings of IEEE International Geoscience and Remote Sensing Symposium, July 20-25, 2003, Toulouse, France. 2003 CDROM.
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Use of Spatial Variance Information from Remote Sensing Imagery to Map Vegetation Foliage Density
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WALTHALL, C.L., TIMLIN, D.J., PACHEPSKY, Y.A., DULANEY, W.P., DAUGHTRY, C.S. USE OF SPATIAL VARIANCE INFORMATION FROM REMOTE SENSING IMAGERY TO MAP VEGETATION FOLIAGE DENSITY. AMERICAN GEOPHYSICAL UNION. 2002.
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The Impact of Corn Leaf Optical Properties on Image Tone
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Walthall, C.L., Daughtry, C.S., Norman, J. The impact of corn leaf optical properties on image tone. In: Proceedings of American Society for Photogrammetry and Remote Sensing.
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Comparing Small Scale Spatial Relationships of Surface Soil Water
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Fisher, J., Timlin, D.J., Hill, R., Pachepsky, Y.A., Dulaney, W.P., Walthall, C.L. 2002. Comparing small scale spatial relationships of surface soil water. ASA-CSSA-SSSA Proceedings.
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Linking Within-Field Crop Response with Soil Characteristics
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Kaul, M., Walthall, C.L., Pachepsky, Y.A., Timlin, D.J. 2002. Linking within-field crop response with soil characteristics [abstract]. In: Abstracts of Agronomy Socieity of America, Soil Science Society of America, Crop Science Society of America, Annual Meeting, November 10-15, 2002. Indianapolis, Indiana [CDROM].
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A Mix of Scales: Topographic Information, Point Samples and Yield Maps
- (Peer Reviewed Journal)
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TIMLIN, D.J., PACHEPSKY, Y.A., WALTHALL, C.L. A MIX OF SCALES: TOPOGRAPHIC INFORMATION, POINT SAMPLES AND YIELD MAPS. Bridging Scales in Soil Physics. 2003.
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A Mix of Scales: Topographic Information, Point Samples and Yield Maps
- (Peer Reviewed Journal)
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Timlin, D.J., Pachepsky, Y.A., Walthall, C.L. 2003. A mix of scales: topographic information, point samples and yield maps. Bridging Scales in Soil Physics. p. 227-241.
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Corn Leaf Chlorophyll Status from Hyperspectral Images
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Daughtry, C.S., Hunt, E.R., McMurtrey, J.E., Doraiswamy, P.C., Walthall, C.L., Gish, T.J. 2002. Corn leaf chlorophyll status from hyperspectral images [abstract]. American Society of Agronomy Meetings [CDROM].
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Remote Sensing Leaf Chlorophyll Concentration in Corn Fields
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Daughtry, C.S., Hunt, E.R., McMurtrey, J.E., Gish, T.J., Walthall, C.L., Remote sensing leaf chlorophyll concentration in corn fields [abstract]. International Conference on Precision Agriculture [CD ROM].
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Remote Sensing Using Radio-Controlled Model Aircraft and Airborne Sensors for Nutrient Management
- (Book/Chapter)
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Hunt, E.R., Daughtry, C.S., Walthall, C.L., McMurtrey, J.E., Dulaney, W.P. 2003. Agricultural remote sensing using radio-controlled model aircraft. In: Van Toai, T., Major, D., McDonald, M., Schepers, J., and Tarpley, L. editors. Digital Imaging and Spectral Techniques: Applications to Precision Agriculture and Crop Physiology. ASA Special Publication 66. Madison, WI: ASA-CSSA-SSSA. p. 191-199.
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Development of a Spectrally Based Canopy Pigment Index for Nitrogen Needs in Corn Crops
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McMurtrey, J.E., Daughtry, C.S., Doraiswamy, P.C., Walthall, C.L., Hunt, E.R., Corp, L.A. 2002. Development of spectrally based canopy pigment index for nitrogen needs in corn crops. In: Proceedings of the International Conference on Precision Agriculture. 1(1):1601.
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Comparison of Remote Sensing Imagery for Nitrogen Management
- (Proceedings/Symposium)
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Hunt, E.R., Daughtry, C.S., McMurtrey, J.E., Walthall, C.L., Baker, J.A., Schroeder, J.C., Liang, S. 2003. Comparison of remote sensing imagery for nitrogen management. In: P.C. Robert, editor. Proceedings of the Sixth International Conference on Precision Agriculture 2002. [CDROM].
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Estimating Corn Grain Yield from Temporal Variations of Soil Moisture
- (Abstract)
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Gish, T., Buss, P., Daughtry, C.S.T., Dulaney, W.P., Walthall, C. 2002. Estimating corn grain yeild from temporal variations of soil moisture. In: Proceedings of 6th International Conference on Precision Agriculture and Other Precision Resource Mnagement Conference, July 14-17, 2002, Bloomington, Minnesota. p. 157.
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Exploiting Image Spatial Variance for Vegetation Patterns
- (Proceedings/Symposium)
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Walthall, C.L., Timlin, D.J., Pachepsky, Y.A., Dulaney, W.P., Daughtry, C.S., 2002. Exploiting image spatial variance for vegetatation patterns. In: Proceedings of American Society for Photogrammetry and Remote Sensing, November 12-14, 2002, Denver, Colorado, [CDROM].
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