Download Crop Layer	Format
2022 (Available by February 2023)	.shp
2021	.shp
2020	.shp
2019	.shp
2018	.shp
2017	.shp

Note: All data is provided as ESRI shapefiles in Zip archives. (Unless stated otherwise)

All data is projected to CCS83 (California Coordinate System NAD83), Zone 3, US Survey feet (EPSG 2227)
Each shapefile set (*.zip) contains a corresponding ESRI projection file (*.prj) within it.
A stand-alone copy of the projection file is available here.