10 



CIRCULAR NO. 120, BUREAU OF PLANT INDUSTRY. 



Table L — Xuiiiiikuii of iii(l(<ir(il<t</i<-iil (ihscinil inns at llic San Aiiluiii'i I^jjk ri- 

 iii< III I'linii. I'.iin In I'JI.L iiichisin: — ("ontimieil. 



TliMI-KHATriiK CF.). 



ROTATION AND TILLAGE EXPERIMENTS.' 



The rotation and tillag;e experiments, which are eonihicted on S'2 

 plats of one-fourth of an acre each, were continued as ]>reviously. 

 except that milo was substituted for corn on four phits and for oats 

 on one phit. 



The results of the rotation experiments indicate that crop rotation 

 is an important factor in crop production in this section of Texas, 

 the yields of crops grown in a suitable rotation being on the whole 

 uniformly higher than when grown continuously on the same land. 

 The average yields of all crops except cotton were the highest of any 

 3^ear since the work was started in 1009. 



Table II giACS the crops in the rotation experiments, tlie number of 

 plats planted to each crop in 1912, the average yields per acre, and 

 the highest and lowest yields per acre in 1912. 



1 These experiments are under the direct supervision of Mr. C. U. Letteer, assistant. 

 ICir. 120]' 



