4 DEPAETMEXT OF AGERULTURE BULS. 701-725, 



Department Bulletin No. 705. — Profitable Management of General 



Farms in the Willamette Valley. Oregon — Continued. Page. 



Some factors which influence efficiency 8 



Some factors which influence crop yields 14 



Relation of soil type to percentage farm income is of capital 19 



Causes of the difference in efficiency 20 



Starting clover on the clay soil 21 



Publications of the United States Department of Agriculture relating to 



farm management 23 



Department Bulletin No. 706. — American Sumac: A Valuable Tanning 

 Material and Dyestuff: 



Introduction 1 



Species of American sumac 3 



Present methods of gathering and curing American sumac 5 



Tannin content of American sumac 8 



Sumac extract 9 



Disposal of extracted material 10 



Causes of poor quality in sumac 10 



Cooperation for better sumac 11 



Directions for proper gathering and curing of sumac 11 



Buyers of sumac 12 



Summary 12 



Department Bulletin Xo. 707. — Results of Experiments with Mis- 

 cellaneous Sub.stances against Bedbugs, Cockroaches, Clothes Moths, 

 AND Carpet Beetles; 



Introduction 1 



Bedbugs 2 



^lethods of testing 2 



Killing effects of liquids against bedbugs -. . 2 



Experiments with powders and other materials 4 



Fumigation against bedbugs 6 



Tests of materials against bedbug eggs 7 



Summaiy 7 



Cockroaches 8 



Methods of testing 8 



Action of materials on roaches 9 



Killing effects of powders substances used as dusts against roaches. . . 9 



Experiments with liquids and pastes 14 



Fumigation against roaches 15 



Summary 15 



Clothes moths 16 



Species used in experiments 16 



Methods of testing 16 



Experiments against clothes moths 18 



Summary- 28 



Carpet beetles 29 



Species used in experiments 29 



Methods of testing 29 



Experiments against carpet beetles 31 



Summary 36 



Department Bulletin No. 708. — Shuck Protection for Ear Corn: 



Introduction 1 



Relation of shuck characters to insect infestation 2 



I'ield investigations 2 



Storage investigations 2 



Laboratory investigations 7 



Results of investigations in 1916 8 



Shuck extension as a preventive of worm damage 9 



Relation of shuck covering to mold and discoloration 11 



General value of a good shuck covering 12 



Advantages in the field 12 



Advantages in storage 13 



Advantages in market quality 14 



Relation of increased shuck protection to the cost of shucking 14 



The production of better shuck protection 15 



Summary- 16 



