This series consists of reports documenting historical fruit production and environmental conditions in Napa County, along with a detailed soil survey of the Marin-Napa area. The Fruit Frost Reports provide observations and data related to frost events and their effects on fruit trees and crop yields in Napa County. These reports offer insight into historical agricultural challenges and climate impact on viticulture and orchard management. The Soil Survey includes systematic description, classification, and mapping of soil types in Marin and Napa Counties. These materials were likely used for agricultural planning, land use management, and environmental assessment. Materials are Arranged as found.