THE PRESENT ORGANIZATION 45 



made numerous and extensive soil surveys in various parts 

 of the countr}'. Because of the recently increased demand 

 for natural fertilizers, this bureau has begun extensive in- 

 vestigations of the fertilizer resources of the United States. 

 It also assists in the classification of agricultural lands on 

 the reclamation projects and in the national forest reserves. 



Bureau of Entomology 



The Bureau of Entomology conducts extensive investiga- 

 tions relating to insects, particularly those which are injuri- 

 ous or beneficial to plant or animal life and the best means 

 of destroying those found to be injurious. It assists in 

 supervising and enforcing such quarantines as are estab- 

 lished by the Secretary for the prevention of the spread of 

 insect pests. 



Bureau of Biological Survey 



This bureau is charged with the maintenance and super- 

 vision of the various game bird reservations that have been 

 established in recent years. It conducts investigations re- 

 garding the food habits of birds and wild animals; makes 

 surveys relating to the supply, migrations, and geographic 

 distribution of such birds and animals ; carries on experi- 

 ments and demonstrations in the control or eradication of 

 birds and animals which are injurious to agriculture and 

 animal husbandry ; and cooperates with state agencies in 

 the protection of game. This bureau is also in charge of 

 the administration of the two federal laws which have been 

 passed for the protection of wild game. 



Bureau of Crop Estimates 



The principal function of this bureau is the securing, and 

 compiling of data regarding crop and animal production and 

 the making and publishing of periodical estimates based 

 thereon. Most of its information is derived from reports 

 received from thousands of voluntary crop reporters. 

 These reports are checked and compared witli more general 



