2004-2006 Farmland Conversion Report

Irrigated farmland losses accelerated compared with the 2002-2004 period, as steady urbanization rates combined with changing agricultural markets and resource availability factors.  Farm and grazing lands in California decreased by 275 square miles (176,014 acres) between 2004 and 2006 as documented by the Farmland Mapping and Monitoring Program (FMMP).  The highest-quality agricultural soils, known as Prime Farmland, comprised 46% of the loss (81,247 acres).  Urban development was concentrated in a smaller number of counties, resulting in an increase of 0.2% in urbanization relative to the 2002-04 period (102,010 and 101,825 acres, respectively).   

Complete report (2.8 MB PDF)

Report split and compressed to facilitate download-

Introductory Materials: Acknowledgements; Table of Contents (311 kb PDF)

Main Report: Executive Summary; Program Introduction; 2006 Improvements; Understanding the Data; Land Use Conversion 2004-2006 (1.1 MB PDF)

Appendices A, B, C, D, and E: County Conversion Tables*, 2004 and 2006 County Acreage Tallies; County and Regional Conversion Summaries; Rural Land Use Mapping Summaries; Farmland of Local Importance Definitions (589 kb)

* Report tables are in PDF format- Excel 2000 versions of the same tables are also available for download.  
You may need to update Acrobat Reader if you get error messages.

Please contact FMMP​ if you have additional questions.