Which factor has been considered to be most important in causing shifts from grassland to shrubland in
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Which factor has been considered to be most important in causing shifts from grassland to shrubland in the southwestern United States?
a. Excessive fire
b. Climatic change
c. Increases in grasshoppers
d. Increases in rabbits and rodents
e. Destruction of the bison
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Related Book For
Range Management Principles and Practices
ISBN: 978-0135014165
6th edition
Authors: Jerry L. Holechek, Rex D. Pieper, Carlton H. Herbel
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