CONTENTS 



Page 



INTRODUCTION , , , 1 



EXPERIMENTAL PROCEDURE , , , 4 



DESCRIPTIONS OF THE PLOT OVERSTORY STANDS 7 



Forest Cover and Vegetation Habitat Types , 7 



Composition and Density , 8 



Rne Age Classes » , . 13 



RISK RATINGS OF LIVING PONDEROSA PINE TREES 15 



Distribution of Risk Rated Trees. 15 



Risk Ratings and Soil Characteristics 19 



Risk Ratings and Tree Growth Rates . , . 19 



Mean Volumes of Risk Rated Trees , 20 



CAUSES OF PINE TREE KILLING 21 



RISK RATINGS OF BEETLE-KILLED PONDEROSA PINE TREES. , 25 



DISCUSSION AND CONCLUSIONS 28 



LITERATURE CITED 31 



