I want to express my sincere thanks to all authors who submitted research papers to support the Third IFIP International Conference on Computer and Computing Te- nologies in Agriculture and the Third Symposium on Development of Rural Infor- tion (CCTA 2009) held in China, during October 14-17, 2009. This conference was hosted by the CICTA (EU-China Centre for Information & Communication Technologies, China Agricultural University), China National En- neering Research Center for Information Technology in Agriculture, Asian Conf- ence on Precision Agriculture, International Federation for Information Processing, Chinese Society of Agricultural Engineering, Beijing Society for Information Te- nology in Agriculture, and the Chinese Society for Agricultural Machinery. The pla- num sponsor includes the Ministry of Science and Technology of China, Ministry of Agriculture of China, Ministry of Education of China, among others. The CICTA (EU-China Centre for Information & Communication Technologies, China Agricultural University) focuses on research and development of advanced and practical technologies applied in agriculture and on promoting international communi- tion and cooperation. It has successfully held three International Conferences on C- puter and Computing Technologies in Agriculture, namely CCTA 2007, CCTA 2008 and CCTA 2009. Sustainable agriculture is the focus of the whole world currently, and therefore the application of information technology in agriculture is becoming more and more - portant. 'Informatized agriculture' has been sought by many countries recently in order to scientifically manage agriculture to achieve low costs and high incomes.

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Target Detection in Agriculture Field by Eigenvector Reduction Method of Cem.- Application of 3S Techniques in the Study of Wetland Environment of Dong Ting Lake.- A Classification of Remote Sensing Image Based on Improved Compound Kernels of Svm.- Monitoring Method of Cow Anthrax Based on Gis and Spatial Statistical Analysis.- The Research on Natural Vegetation's Response to Agriculture in Tarim River Basin in Recent 50 Years Using Multi-Source Remote Sensing Data.- The Service Architecture of Agricultural Informatization.- A Forecast Model of Agricultural and Livestock Products Price.- A Network-Based Management Information System for Animal Husbandry in Farms.- Research of Animal Disease Information System Based on GIS Technology.- Modern Agricultural Digital Management Network Information System of Heilongjiang Reclamation Area Farm.- Case Analysis of Farm Agriculture Machinery Informatization Management Network System.- Study on Retrieval Technique of Content-Based Agricultural Scientech Multimedia Data.- A Design of an Experimental System for Trapping Pressure of Agricultural Gear Pump.- CropIrri: A Decision Support System for Crop Irrigation Management.- Collection of Group Characteristics of Pleurotus Eryngii Using Machine Vision.- The Design of Flower Ecological Environment Monitoring System Based on ZigBee Technology.- Zigbee Wireless Sensor Network Nodes Deployment Strategy for Digital Agricultural Data Acquisition.- Research on 3G Technologies-Based Agricultural Information Resource Integration and Service.- Research on Agricultural Surveillance Video of Intelligent Tracking.- Expert Control Based on Neural Networks for Controlling Greenhouse Environment.- A Review of Non-destructive Detection for Fruit Quality.- Automatic Grading of the Post-HarvestFruit: A Review.- A Voice Processing Technology for Rural Specific Context.- A New On-Line Detecting Apparatus of the Residual Chlorine in Disinfectant for Fresh-Cut Vegetables.- The Design of the Automatic Control System of the Gripping-Belt Speed in Long-Rootstalk Traditional Chinese Herbal Harvester.- A Virtual Prototyping Technology for Design of Pressing Equipment of Dried Tofu.- Headland Turning Control Method Simulation of Autonomous Agricultural Machine Based on Improved Pure Pursuit Model.- Design of Plant Eco-physiology Monitoring System Based on Embedded Technology.- Motion Law Analysis and Structural Optimization of the Ejection Device of Tray Seeder.- Nozzle Fuzzy Controller of Agricultural Spraying Robot Aiming Toward Crop Rows.- Design of Intelligent Hydraulic Excavator Control System Based on PID Method.- A Control System for Tobacco Shred Production Line Based on Industrial Ethernet.- Intelligent Controlling System of Aquiculture Environment.- Development of a Semi-controller for a Variable Rate Fertilizer Applicator.- Design of Intelligent Conductivity Meter Based on MSP430F149.- Intelligent Control Technology for Natural Ventilation Used in Greenhouse.- An Application of RFID in Monitoring Agricultural Material Products.- The Development Model Electronic Commerce of Regional Agriculture.- Food Traceability System Tending to Maturation in China.- Study on Intelligent Multi-concentrates Feeding System for Dairy Cow.- Construction of Traceability System for Quality Safety of Cereal and Oil Products.- The Study and Implementation of Text-to-Speech System for Agricultural Information.- General Framework for Animal Food Safety Traceability Using GS1 and RFID.- The Function Analysis of Informationization in New Rural Cooperatives Medical ServiceManagement.- Current Situation and Countermeasures of Agricultural Information Construction in Jiamusi Area.- Fuzzy Comprehensive Evaluation of Rural Information Poverty in China -- Case Study of Hebei Province.- Realization of the Regional Advantageous Agricultural Industries Analysis System.- Research of Development of Agricultural Knowledge Service in China.- A Study on the Digital Integrated Platform of China Participatory Rural Community Informationization.- Multipath for Agricultural and Rural Information Services in China.- The Design and Development of Test Platform for Wheat Precision Seeding Based on Image Processing Techniques.- Using L-M BP Algorithm Forecase the 305 Days Production of First-Breed Dairy.- The Fuzzy Model for Diagnosis of Animal Disease.- Texture Detect on Rotary-Veneer Surface Based on Semi-Fuzzy Clustering Algorithm.- Three-Dimension Visualization for Primary Wheat Diseases Based on Simulation Model.- Digital Modeling and Testing Research on Digging Mechanism of Deep Rootstalk Crops.- In Internet-Based Visualization System Study about Breakthrough Applet Security Restrictions.- Study of the Quality of Bee Product Tracking and Traceability System Based on Agent Technology.- RFID Based Grain and Oil Products Traceability and Its Computer Implementation.- Studies on the Pasting and Rheology of Rice Starch with Different Protein Residual.- Research on Time and Spatial Variability of Soil pH in Sanmenxia Planted Tobacco Area.- Web N.0, the New Development Trend of Internet.- Study and Improvement for Slice Smoothness in Slicing Machine of Lotus Root.- The Research of Key Technologies of Streaming Media Digital Resources Transmission Based on CDN and P2P.- Influence of Sound Wave Stimulation on the Growth of Strawberry in SunlightGreenhouse.- Seeding Element Polarity Arrangement on Drum-Type Magnetic Precision Seeder.- Problems and Countermeasures on the Development of Precision Agriculture in Heilongjiang Province.- Research on Regional Spatial Variability of Soil Moisture Based on GIS.- A Study on Using AD5933 to Realize Soft-Sensing Measurement of Conductance and Capacitance.- Wireless Sensor Networks Applied on Environmental Monitoring in Fowl Farm.- Research on Non-destructive Comprehensive Detection and Grading of Poultry Eggs Based on Intelligent Robot.- A Pvdf Sensor for Monitoring Grain Loss in Combine Harvester.- Quantification Model for Estimating Temperature Field Distributions of Apple Fruit.- A Wireless Real-Time Monitoring Node of the Physiological Signals for Unrestrained Dairy Cattle Using Wireless Sensor Network.- The Application of Wireless Sensor Networks in Management of Orchard.- Research of Rice-Quality Based on Computer …