Appeal No. 1999-1101 Application 08/727,125 chlorophyll concentration by reflectance measurements and that chlorophyll concentration is directly related to nitrogen fertilizer requirements of the crop. One of ordinary skill in the art would have been motivated to substitute a reflectance measurement sensor, either vertically or obliquely mounted, as taught in Demetriades-Shah for the soil measurement sensor in the real-time system of Monson because: (1) it was a known alternative way to determine fertilizer requirements; (2) Peterson suggested remote sensing in place of soil testing to determine fertilizer requirements and Demetriades-Shah was one known type of remote sensor for determining fertilizer requirements; and (3) there is a direct correlation between the measured chlorophyll (nitrogen) content of the crop and the fertilization requirements of the crop in Demetriades-Shah and Peterson, whereas there is only an indirect correlation between the nitrogen content of the soil and the fertilization requirements of the crop in Monson. In the absence of persuasive arguments to the contrary, the combination of references is sufficient to establish a prima facie case of obviousness. - 10 -Page: Previous 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 NextLast modified: November 3, 2007