Sideoats grama plants clipped to various heights and frequencies were used to compare plant growth response to additions of animal saliva and thiamine. Comparisons were also made between plants which were either grazed or clipped. Results indicated that plants will respond to additions of thiamine when they are clipped at a moderate intensify (6 inches) and frequency (6 weeks). Plants did not respond to thiamine or saliva when clipped to three inches regardless of the frequency. Plants grazed by cattle, sheep or goats had significantly higher growth rates than clipped plants. Caution should be taken in interpreting data when mechanical clipping is substituted for grazing.
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Forage production under five different grazing management schemes was compared after 20 years of treatment in the Edwards Plateau region of Texas. Results from this study showed that: (1) a more dense ground cover does not always result in higher forage production; (2) forage yields and litter accumulation were lower on a natural area than under deferred rotation or light grazing; (3) greatest amounts of decreaser plants were found in deferred rotation pastures; (4) natural areas have limited value in range research since they do not respond in comparative patterns; and (5) the 4-pasture deferred rotation system produced the most desirable livestock and wildlife habitat for the Edwards Plateau region of Texas.
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