Remote Sensing Applications on Crop Monitoring and Prediction
2013
Agricultural food production is an essential component of societal well-being. The risk of
food supply disruptions will continue to grow as our agricultural systems and the land that
sustains us continue to respond to the pressures of climate change, energy needs, and population increase. Accurate, objective, reliable, and timely predictions of crop yield over large
areas are critical for national food security as they can support policy making on import/
export plans and prices (Li et al. 2007b). A number of global trends suggest an urgent need
for a comprehensive, systematic, and accurate global agricultural monitoring system (Brown
2005). More frequent extreme climate events such as floods, drought, and frosts are adversely
affecting agricultural production worldwide. Changes in precipitation amount, seasonality,
intensity, and distribution impact rain-fed agriculture. Further adaptation of agricultural systems to a changing climate can be expected (FAO 2007). The increase in global population,CONTENTS17.1 Introduction 315
17.1.1 Early Warning 316
17.1.2 Crop Production Monitoring 316
17.1.3 Agricultural Sustainability 31617.2 Advances in Methodology 317
17.2.1 Crop Condition Monitoring 317
17.2.2 Agricultural Drought Monitoring 318
17.2.3 Crop Acreage Estimation 318
17.2.4 Crop Yield Estimation 319
17.2.5 Crop Phenophase Monitoring 31917.3 Global and National Operational Systems 320
17.3.1 CropWatch 320
17.3.2 Global Information and Early Warning System 323
17.3.3 USDA/Foreign Agricultural Service 323
17.3.4 Monitoring Agricultural Resources 324
17.3.5 National Systems 325
17.3.6 Comments on Crop Monitoring Systems 32617.4 Next Steps in Crop Monitoring 328
References 328changes in cropland extent, and the draw-down rate of aquifers are also placing more pressure on food security.
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