Table 1. Areas of vegetative cover types in the Sonoran Desert, physiographic area 82. 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
Ponderosa pine, fir-spruce forest *

38,300

94,639

0.34
Mixed hardwood forest *

108,300

267,609

0.95
Pinyon pine-juniper forest

26,200

64,740

0.23
Chaparral forest

168,100

415,375

1.48
Open oak, bluestem woodland

54,300

134,175

0.48
Annual grasses, manzanita, oak

22,900

56,586

0.20
Wheat, corn, soybeans

144,000

355,824

1.27
Irrigated agriculture

402,400

994,300

3.54
Grama, wheatgrass, bluestem grassland

218,600

540,161

1.92
Pasture, hay, mixed crops

25,900

63,999

0.23
Sagebrush prairie

2,494,200

6,163,168

21.95
Greasewood brushland

1,152,300

2,847,333

10.14
Creosote brushland

2,267,500

5,602,992

19.96
Barren land, sparse vegetation

3,716,900

9,184,460

32.71
Water *

127,900

316,041

1.13
Urban

289,200

714,613

2.54
No data *

105,300

260,196

0.93
 Totals

11,362,300

28,076,243

100