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Joelyn K. Foy
Research Associate
Texas Agricultural Experiment Station
Vernon, Texas
Why Natural Resources?What do natural resources have
to do with the producer?
Part A
Introduction
Why Natural Resources?What do natural resources have
to do with the producer?
Source: Jenny, p. 358
Over time, soil and vegetation develop … unless
Source: Jenny, p. 358
… the process is disturbed
Ecosystem
Forest Pine beetle invasionLack of natural fireCatastrophic fireNot harvestingClear-cuttingDroughtFloods
**cropping**
Disturbance
Ecosystem
Range Exotic plant invasionBrush invasionLack of natural fireCatastrophic fireNot grazingOvergrazingDroughtFloods
**cropping**
Disturbance
Ecosystem Disturbance
Crop orAgroecosystem
Weed invasionInsect invasionDroughtFloods
common brome
impenetrable mesquite
fuel for fire – but no prescription!
end of part a
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