Publications |
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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
- (Review Article)
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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
- (Abstract)
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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
- (Proceedings/Symposium)
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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.
- (Abstract)
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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
- (Proceedings/Symposium)
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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
- (Proceedings/Symposium)
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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
- (Abstract)
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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
- (Proceedings/Symposium)
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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
- (Abstract)
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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
- (Abstract)
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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
- (Abstract)
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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
- (Abstract)
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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
- (Abstract)
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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
- (Abstract)
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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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