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Summary: o Location: Waggoner Ranch (33o 51' N, 99o 27' W; elevation =
350400 m) in the eastern Rolling Plains region of north
central Texas near Vernon.
o Climate: Semiarid continental (MAP = 665 mm; MAT = 17°C).
o Soils: Alluvial clay loams (fine, mixed, thermic Typic
Paleustolls Tillman series).
o Vegetation: Mixedgrass mesquite savanna (mixture of C3 and
C4 grass species in the herbaceous layer, and honey mesquite
(Prosopis glandulosa) in the tree layer).
Vegetation, Land Use History, and Patterns of Soil Organic Carbon in the Southern Great Plains
Thomas W. Boutton 1 and Steven R. Archer 2
Texas A&M University 1 and University of Arizona 2
Study Area
Grassland
Total Nitrogen (g N m-2)
20 40 60 80 100 120 140 160 180 200
Soildepth(cm)
0
20
40
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