﻿CONTENTS. 6 



Department Bulletin No. 8. — The Western Corn Rootworm. Page. 



Introduction 1 



Distribution 2 



History of the insect and its ravages 2 



Difficulty in detecting injury to corn 5 



Food of the beetles 5 



Effects of attack of the larvae 6 



Natural enemies 6 



Crop rotation as a preventive measure 6 



Department Bulletin No. 9. — An Economic Study or the Acacias. 



Purpose of the study *. 1 



The genus acacia 1 



Characteristics of various species 3 



History of acacia culture in California 6 



Economic uses '. 9 



Propagation and management of acacias 34 



General conclusions 37 



Department Bulletin No. 10. — Progress Report op Cooperative Irriga- 

 tion Experiments at California University Farm, Davis, Cal., 

 1909-1912. 



Introduction 1 



Irrigation of alfalfa 2 



Irrigation of grain, 1910, 1911, and 1912 10 



Irrigation experiments with Indian and Egyptian corn in 1910 and 1911 13 



Irrigation and crop rotation experiments in 1912 17 



Department Bulletin No. 11. — Forest Management op Loblolly Pine in 

 Delaware, Maryland, and Virginia. 



Loblolly pine adapted to forest management 1 



Distribution and importance 1 



. Characteristics of loblolly pine 4 



Utilization 11 



Management of loblolly pine forests 21 



Appendix A 43 



Nomenclature 43 



Distinguishing characteristics of the tree 43 



Characteristics of the wood 44 



Appendix B 45 



Tables 45 



Department Bulletin No. 12. — Uses of Commercial Woods of the 

 United States. Beech, Birches, and Maples. 



Introduction : 1 



Beech 2 



Sweet birch 11 



Yellow birch 18 



Paper birch 22 



Gray birch 29 



Western birch 29 



Kenai birch 29 



White birch 29 



Mountain birch 30 



River birch 30 



Sugar maple 32 



Black maple 47 



