http://rubicon.water.ca.gov/v2/TSL7.html
Year Acres Under Agricultural Production Acres in Production Evapoartive Loss in Acre-feet Estimated Evaporative Loss for a 15-Year Period Crop Acre ETAF
1840 0 0 0 0 Grain 1 1
1850 25 10 39.3 589.5 Field 1 2
1860 50 100 393 5895 Alfalfa 1 4.3
1870 100 1000 3930 58950 Pasture 1 4.5
1880 10000 39300 589500 Truck Crops 1 1.5
1890 15000 58950 884250 Deciduous 1 2
1900 1000 Averge 2.55 af/acre
1910
1920 http://rubicon.water.ca.gov/v2/TSL6.html
1930
1940
1950
1960 Crop Acre ETAF
1970 Grain 1 0.89
1980 Field 1 0.89
1990 15000 Alfalfa 1 4.04
2000 14000 Pasture 1 3.44
2010 14000 Truck Crops 1 1.5
2020 13000 Deciduous 1 2.62
Pistachios 1 1
Averge 3.93 af/acre