CONTENTS 



Page 



Introduction 1 



Stand Description 1 



Methods 1 



• Results 2 



V 



Conclusions 4 



Appendix- -Stand Growth and 



Development Tables 3-7 . . 5 



ABSTRACT 



Moderate commercial thinning of young, mer- 

 chantable ponderosa pine stands can provide an 

 immediate income from the land with only a 

 small reduction in volume growth. This experi- 

 ment compared growth for 10 years following: 

 (1) moderate thinning that removed 30 percent 

 of the volume; (2) heavy cutting that removed 75 

 percent of the volume; and (3) no cutting. Net 

 annual increment per acre averaged 338 board 

 feet following no cutting and 308 board feet fol- 

 lowing moderate thinning compared to only 161 

 board feet following the heavy cutting. 



