EXPERIMENT STATION REPORTS. 



287 



TABLE IV. — Average yield and ralue of crops grown in rotation, 1911-1015. 



Rotation. 



Average ^ield per acre. 



Grain in bushels. 

 Beets and liay in tons. 



Average 

 annual 



value of 

 crops. 



Corn. 



Small 

 grain. 



Hay. 



Corn, oats, clover. . . . 



Corn, rye, clover 



Corn, wheat clover. . . 

 Corn, wheat, timothy 



Beans, wheat, clover. 

 Beans, oats, clover. . 



Potatoes, wheat, clover. 



Beets, oats, clover. 



Corn, beans, clover or soy beans. 

 Beans continuously 



Wheat continuously . 

 Corn continuously . . 



Beets continuously . 



38.4 

 41.. 5 

 39.8 

 37.5 



Beans. 



15.6 

 12.7 



Potatoes. 



127.2 



Beets. 



5.21 



Corn. 



34.6 



Potatoes continuously . 

 Timothy continuously . 

 Alfalfa continuously. . . 



36.2 



Beets. 



5.9 



Potatoes. 



93.2 



46.7 

 27.1 

 25.2 

 22.6 



28.5 

 42.3 



31.2 



46.0 



Beans. 



12.0 

 11.6 



Wheat. 



23.2 



1.26 

 1.47 

 1.39 

 1.41 



1.26 

 1.40 



1.36 



1.76 

 Soy beans. 

 11.0 



1.16 

 2.31 



$19 39 

 21 36 

 21 48 

 20 23 



21 85 

 17 72 



35 09 



20 68 



23 32 

 20 30 



20 88 

 25 34 



29 50 



46 60 

 11 60 

 23 10 



In the application of commercial fertilizer to wheat in the corn, wheat, 

 clover rotation (Table I) the largest yields and the largest net value 

 of increase have been secured from the application of the complete 

 fertilizer. In this case an investment of $5.73 in fertilizer resulted in a 

 crop increase value at |19.24 and a net profit of |13.51. The use of 

 acid phosphate and muriate of potash have given nearly as much profit, 

 viz., 112.75. On the farm to which more or less manure is applied this 

 treatment would probably show a greater relative profit. The use of 

 the acid phosphate aloue has given a slightly larger net profit than the 

 use of nitrate of soda and acid phosphate. The acid phosphate has 

 produced better results than the floats or raw phosphate, although the 

 latter have shown a good profit. 



It is of interest to note (Table II) the large increases in the yield 

 of corn and wheat by the use of the manure and the high values placed 

 on manures based on the increases in the two crops only. These values 

 are very much above those usually placed by farmers on their stock 

 manures and indicate strongly, as do also the relative values of the yard 

 and stall manures, the importance of conserving the manure produced 

 on the farm. The stock manure is not, however, a well rounded manure 



