1. Introduction to Sensors Used in Precision Agriculture Ruth Kerry, Brigham Young University, USA Alexandre Escolà, Universitat de Lleida, Catalonia, Spain2. Remote Sensing David Mulla, University of Minnesota, USA Pablo Zarco-Tejada, Spanish National Research Council (CSIC), Spain3. Crop Geometry and Structure Alexandre Escolà, Universitat de Lleida, Catalonia, Spain4. Soil Sensing Robin Gebbers, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Germany Slava Adamchuck, McGuill University, Canada 5. Sensing with Wireless Sensor Networks Francis J. Pierce, Michigan State University East Lansing, USA George Vellidis, University of Georgia, USA6. Health, Vigour and Disease Detection in Arable Crops Richard Ferguson, University of Nebraska, USA Yuxin Miao, China Agricultural University, China7. Other Sensing Techniques in Arable Crops Dan S. Long, USDA Agricultural Research Service, Washington, USA R. Hackett, Teagasc, Oak Park Research Centre, Carlow, Ireland8. Sensing in Horticulture Spyros Fountas, Agricultural University of Athens, Greece Manuela Zude, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Germany9. Use of UAV in Precision Agriculture Chunhua Zhang, Department of Geography and GeologyAlgoma University Sault Ste. Marie, Canada John M. Kovacs, Department of Geography Nipissing University North Bay, Canada 10. Weed Detection F. López-Granados, Spanish National Research Council (CSIC), Spain Svend Christensen, Danish Institute of Agricultural Sciences, Denmark Roland Gerhards, Universität Hohenheim, Germany11. Precision Irrigation V. Alchanatis Yafit Cohen, Institute of Agricultural Engineering, ARO, Israel J. Bellvert, Research Institute IRTA, Catalonia, Spain12. Health and Vigour Bruno Tisseyre, Montpellier SupAgro, Montpellier, France Jose Molin, University of Sao Paulo, Brasil13. Disease Detection Erich-Christian Oerke, University of Bonn, Germany 14. Conclusions: Future Directions in Sensing for Precision Agriculture Ruth Kerry, Brigham Young University, USA Alexandre Escolà, Universitat de Lleida, Catalonia