336 



STATE BOARD OF AGRICULTURE. 



be accepted as showing the relative value of tlie several rotations be- 

 cause of the wide variation in the cost of production and because of 

 other factors which determine the choice of crops and the system of 

 fanning. 



TABLE VIII.— AVERAGE YIELD AND VALUE OF CROPS GROWN IN ROTATION, 1911-1915. 



Rotation. 



Corn, oats, clover. . . . 



Corn, rye, clover 



Corn, wheat, clover. . 

 Corn, wheat, timothy. 



Beans, wheat, clover. 

 lU'ans, oats, clover. . 



Potatoes, wheat, clover. 



Beets, oats, clover. 



Corn, beans, clover or soy beans. 

 Beans, continuously 



Wheat, continuously. 

 Corn, continuously. . 



Beets, continuously. 



Potatoes, continuously. 

 Timothy, continuously. 

 Alfalfa, continuously. . 



Average yield per acre. 



Grain in bushels. 

 Beets and hay in tons. 



Corn. 



3.8.4 

 41.. 5 

 39.8 

 37.5 



Beans. 



15.6 

 12.7 



Potatoes. 



127.2 



Beets. 



5.21 



Corn. 



34.6 



36.2 



Beet.s. 



5.9 



Potatoes. 



93.2 



Small 

 grain. 



46,7 

 27.1 

 25.2 

 22.6 



28 . 5 

 42.3 



31.2 



46.0 



Beans. 



12.0 

 11.6 



Wheat. 



23.2 



Hay. 



1.26 

 1.47 

 1 . 39 

 1.41 



1 .26 

 1 .40 



1.36 



1.76 



Soy beans 



11.0 



1.16 

 2.31 



Average 

 aiunial 



value of 

 crops. 



519 39 

 21 .36 

 21 ,48 

 20 , 23 



21.85 



17.72 



35 , 09 



20 , 08 



23.32 

 20 . 30 



20.88 

 25 . 34 



29 , 50 



46.60 

 11 , 60 

 23.10 



ACKNOWLEDGMENTS. 



Previous to the beginning of this experiment the various members of 

 the station staff were consulted in regard to the plans of the experi- 

 ments, arrangement of plats, etc., and many valuable suggestions were 

 offered. 



During the progress of the experiment the Soils Department has as- 

 sisted in surveying of the drainage system, and the Chemistry Division 

 has assisted by making chemical analyses of s(dl samples and fertilizers. 



In 1911, Mr. C. L. Coffeen, then a senior student, and in 1D12-1;J and 

 1914, Mr. H. A. Liiidsey assisted with the culture and care of the plats. 

 In 1915 the plats were under the direct charge of Mr. E. H. Bamer, and 

 in 191 G in charge of Mr. E. E. Down. 



The author wishes to express his appreciation for the services of all 

 those who have assisted, either in the planning or carrying out of this 

 experiment. , 



