Table 1. Areas of vegetative cover types in the Central Valley, physiographic area 91. Forest coverages are taken from USFS FIA data, nonforest cover types are modified from USGS data. Habitat coverages with superscript * are combined from both databases by adding USGS coverage in the "nonforest" section of the USFS database.
Cover types

Area (ha)

Area (ac)

Percent of Total
Chaparral forest

50,042

123,654

0.78
Pinyon pine-juniper forest

38,701

95,629

0.61
Spruce-fir forest

17,311

42,775

0.27
Ponderosa pine forest *

53,822

132,994

0.84
Mixed hardwood forest *

115,405

285,166

1.81
Redwood forest

298

738

0.01
Open oak, bluestem woodland

132,617

327,696

2.07
Wheat, corn, soybeans

832.412

2,056,889

13.03
Irrigated agriculture

1,743,518

4,308,232

27.28
Bluestem grassland

90,932

224,692

1.42
Grama grassland

195,095

482,080

3.05
Wheatgrass grassland

110,332

272,629

1.73
Annual grasses, manzanita

1,300,600

3,213,781

20.35
Pasture, hay, mixed crops

80,983

200,108

1.27
Sagebrush prairie

703,774

1,739,026

11.01
Greasewood brushland

486,991

1,203,355

7.62
Creosote brushland

32,134

79,404

0.50
Barren ground, sparse vegetation

92.523

228,625

1.45
Water *

59,792

147,746

0.94
Urban

253,195

625,645

3.96
 Totals

4,425,100

10,934,422

100