*Principal Investigator Mineralogy, Pedology and Remote Sensing: A Multi- scaled Approach to Potassium Deficiency Risk in

1. Develop and modifying map of benchmark sites on landscapes for sampling. 2. Collect soil samples, characterize, and measure reflectance within stratified landscapes of Woodbridge-Lodi Wine Grape District (WLWGD). 3. Analyze spectral data and compare to collaborators ' x-ray diffraction and potassium fixation analyses. 4. Classify images, when available, by applying spectral models within GIS-stratified images of WLWGD and Carneros District. 5. Additional soil characterization with validation samples collected within image classes. 6. Analyze spectral data of validation samples, refine spectral predictive models for minerals and potassium fixation. 7. Repeat image classification in both districts with refined models. Objectives 1 to 3 were addressed in 2007 with objectives 4 to 7 to be addressed during 2008 through acquisition of hyperspectral images of the wine districts. The results to date have demonstrated a spectral relationship to the minerals within the geomorphic regions and the predictive ability of mineral spectroscopy for potassium fixation