432 Yearbook of tin Department of Agriculture, 1920. 

 dollar invested in the work, and a very marked increase in 



the stock-carrying capacity of the ranges. This may he illus- 

 trated by a recent statement that on 90,000 acres cleared of 

 prairie dogs in Arizona, increased forage has heen raised 

 sufficient to feed an extra head of cattle to every 20 acres, or 

 from 20 to 30 head on each section of land. The forester in 

 charge of the Santa Rita Range Reserve, in New Mexico, re- 

 ports that 2,305 acres, previously of little value because prac- 

 tically all of the forage was consumed by prairie dogs, have 

 been partially restored for grazing purposes, and that when 

 the work is completed this range will carry 75 to 100 addi- 

 tional stock annually. 



.Acreayv treated uith poisoned twit.? for the eradication of prairie doffs 



and ground tquirrcls in Federal and cooperative campaigns, bp 



fltates and fiscal i/cars. 1 



State. 



Acreage treated. 



1910 



1917 



1918 



1919 



1920 



California 



278, .540 

 184,5)60 

 40,5)04 



384,980 

 170,9.53 

 41,642 



263, 920 

 3,332,900 

 159,110 

 277, 751 



420, 710 

 3,232,224 

 795,433 

 737,433 



427,048 

 1,070,814 

 769,480 

 240, 252 

 21,325 

 6,926,94-4 

 75, 275 

 161,231 

 607, 156 

 5,991,275 

 80,543 

 317, 850 

 1,310,200 











73,576 



82, 755 



3,681,673 



4,541,400 









85,000 

 1,167,094 

 5,487,580 





North Dakota 



Oklahoma 



177,010 

 4,960,160 



95,435 

 4,537,600 



951,618 

 4,000,000 

 8,600 

 724,000 

 600,000 



Oregon 



5,390 

 52,371 

 107,293 



13,000 



717,600 



Texas 





3,000 

 4,255 



Utah 





317,960 

 303,200 

 401,628 



589, 756 

 498,644 

 13.5,200 



Washington 







Total 



340,790 



442,647 



717,189 



6,220,994 



5,769,012 



15,897,072 



17,037,206 



19,222,993 



1 The year in each case ends with June 30. 



Pocket Gophers Take the Bait. 



Success has attended similar lines of campaign for the de- 

 struction of pocket gophers, chiefly in Kansas. Nebraska, 

 Idaho. Oregon. New Mexico, and Arizona. Reports have 

 been received from many farmers that it was possible to 



