Table 1. Areas of vegetative cover types in the South Texas Brushlands, physiographic area 7. Forest coverages are taken from USFS FIA data, nonforest cover types are modified from USGS data. Water coverage is combined from both databases by adding USGS water coverage in the "nonforest" section of the USFS database.

Cover types

Area (ha)

Area (ac)

Percent of Total

Oak-hickory forest

200

494

0.00

Pinyon pine-juniper forest

42,500

105,018

0.50

Wheat, corn, soybeans

668,600

1,652,111

7.85

Irrigated agriculture

226,600

559,929

2.66

Bluestem grassland

1,219,900

3,014,373

14.33

Grama grassland

48,900

120,832

0.57

Wheatgrass grassland

35,300

87,226

0.42

Pasture, hay, mixed crops

6,200

15,320

0.07

Open oak, bluestem woodland

4,290,000

10,600,590

50.38

Sagebrush prairie

506,700

1,252,056

5.95

Greasewood brushland

966,500

2,388,222

11.36

Creosote brushland

102,500

253,278

1.20

Barren ground, sparse vegetation

18,500

45,714

0.22

Fresh, saltwater marsh

27,600

68,200

0.32

Water

31,900

78,825

0.38

Urban

174,100

430,201

2.04

No data

149,100

368,426

1.75

 Totals

8,515,100

21,040,812

100