ber types has not been fully confirmed (Larson 
1967): What are specific guidelines on their 
size, density, shape, and optimum distribution? 
What are the impacts of clearings of various 
sizes on timber production, and does the re- 
lease effect along the perimeter of the clearing 
help offset loss of timber production? How 
much does the clearing contribute to the suc- 
cess of the hunter and to the enjoyment of 
hunting? Does the clearing contribute to non- 
consumptive wildlife uses? 
4. How should fertilizers be applied to shrub 
ranges? Does fertilization influence plant com- 
position and density as well as volume produc- 
tion, and how long does the treatment remain 
effective? 
5. It would be desirable to be able to make 
forage quality evaluations in the field without 
the need for detailed laboratory determina- 
tions. Can we develop field techniques for de- 
termining comparative nutritive levels in 
plants? 
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