Viễn thám và GIS cho trang web cụ thể canh tác Có một số khả năng mặc nhiên công nhận đó có Been để trở thành hữu ích trong nông nghiệp. Khả năng luận án đã được thực hiện thông qua những nỗ lực Rất nhiều trong những năm qua (ví dụ, Moran và cộng sự, 1997.). Tập trung tại là Để Thể hiện khả năng của công nghệ có sẵn cho các ứng dụng hoạt động và thực hành. Hope Is Điều đó có thể Chứng minh đó nghiên cứu có sẵn cảm biến từ xa, GPS, GIS. | CHAPTER 19 Remote Sensing and GIS for Site-Specific Farming John G. Lyon Andrew Ward Bruce C. Atherton Gabriel S. Senay and Tom Krill INTRODUCTION There are a number of capabilities that have been postulated to be useful in agriculture. These capabilities have been realized through numerous efforts over the years . Moran et al. 1997 . The focus now is to demonstrate the capabilities of available technologies for operational and practical applications. The hope is that research can demonstrate that available remote sensor GPS and GIS technologies can supply good information for management of crops soils and waters on a within-field basis and do so at reasonable cost. The goals are to potentially improve yields while maintaining or improving soil tilth and water quality Ward and Elliot 1995 Blackmer and Schepers 1996 Gowda et al. 1999 . Precision agriculture approaches can be implemented using a suite of technologies. To address within-field management concerns it is necessary to navigate over short distances and small elevations. The advent of Differential Global Positioning Systems Van Sickle 1996 now provides for the required precision and accuracy. The need for mapping the spatial data collected through a variety of means is met by position information from GPS and mapping capabilities of Geographic Information Systems GIS Lyon and McCarthy 1995 . GIS supplies the maps of soil grid sampling management applications and on-the-go yield and can do so for each season and each year of evaluation with high accuracy Bolstad and Smith 1995 . To supply detail as to crop soil and hydrological conditions over the growing season and from year to year remote sensor data from aircraft or spacecraft are employed Eidenshink and Haas 1992 Thenkabail et al. 1992 1995 Ward and Elliot 1995 Yang et al. 1998 . Use of different parts of the electromagnetic spectrum can help to separate types of crops and weeds general soil and soil moisture characteristics and the potential .
