Earth and Soil Sciences Department
BS in Earth Sciences
Thomas J. Rice
The Saucelito Canyon Vineyard ranch future vineyard site was investigated using eighteen (18) soil pits to document soil morphological properties including soil structure, color, depth, presence of carbonates, and soil chemical characteristics. Pits were also used to obtain soil samples that were delivered to A & L Western Agriculture Laboratories for further soil chemical analysis and to classify the soils.
This collective information was used to classify the soils into five (5) different soil series using Soil Taxonomy. The surface soil textures and slope phases for these soil series were then used to group similar soil types located throughout the vineyards into five (5) different soil map units. The map units were then mapped and delineated on aerial photographic base maps.
Digital soil maps were produced using ESRI software and computer hardware. The aerial photograph, used as a raster image for the digitizing and vector data for the series of maps created, was obtained from the San Luis Obispo County aerial files and the Digital Elevation Model (DEM) was obtained from the city of San Luis Obispo’s county files. Soil map unit boundaries were digitized onto the aerial photograph by creating a polygon shapefile and using the editor tool to draw in the map units.