Table 1. Areas of vegetative cover types in Mississippi Alluvial Valley, physiographic area 5. 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 data in the "nonforest" section of the USFS database.

Cover types

Area (ha)

Area (ac)

Percent of Total

Longleaf-slash pine forest

4,80043,000

11,861

0.04

Loblolly-shortleaf pine forest

151,400

374,109

1.32

Oak-pine forest

31,800

78,578

0.28

Oak-hickory forest

389,600

962,702

3.40

Oak-gum-cypress forest

1,426,800

3,525,623

12.45

Elm-ash-cottonwood, maple forest

31,300

77,342

0.27

Corn, soybeans, wheat, irrigated agriculture

7,893,100

19,503,850

68.87

Bluestem, wheatgrass grassland

205,500

507,790

1.79

Grama grassland

79,100

195,456

0.69

Pasture, hay, mixed crops

774,200

1,913,048

6.75

Sagebrush, creosote brushland

3,000

7,413

0.03

Fresh, saltwater march

116,600

288,119

1.02

Water

166,400

411,174

1.45

Urban

175,400

433,413

1.53

No data

12,500

30,888

0.11

 Totals

24,660,800

60,936,837

100