EXPERIMENT STATION BULLETINS. juO 



Up to 1899 no rotation had been adopted, the plan being to determine something 

 as to the individuality of each plot. That question cannot be d-iscussed here nor 

 will the yields of the other factors in the rotation be given. The following table 

 will record the yields of beets on the separate plots, rejecting plots 8, 10, and 12, 

 which are situated in a hollow and cannot therefore be used. The fertilizers on the 

 different plots are given. Each plot contains one-tenth acre of which the beets 

 occupy a quarter or four square rods. The fertilizers applied to the plots annually 

 were : 



Plot 2 — Two tons of stable manure. 



Plot 4 — 24 lbs. dissolved phosphate rock. 



Plot 14 — 12 lbs. nitrate of soda and 24 lbs. dissolved phosphate rock. 



Plot 16 — 12 lbs. nitrate of soda, 12 lbs. muriate of potash. 



Plot 18 — 48 lbs. Armour's Fruit and Root Crop Special. 



Plot 20— No fertilizer. 



Plot 22 — 12 lbs. muriate of potash. 



Plot 24 — 12 lbs. nitrate of soda, 24 lbs. dissolved phosphate rock and 12 lbs. 

 muriate of potash. 



Plot 26 — 24 lbs. dissolved phosphate rock, 12 lbs muriate potash. 



Plot 28 — 24 lbs. nitrate of soda, 24 lbs. dissolved phosphate rock, 12 Iba. of 

 muriate of potash. 



Plot 30—12 lbs. nitrate of soda. 



Plot 32 — 9.5 lbs. sulphate of ammonia, 24 lbs. dissolved phosphate rock, 12 lbs. 

 muriate of potash. 



The yields of beets on the four square rods in the successive seasons are shown iu 

 the following table: 



For the three 

 1902. 1903. years. Fertilizers. 



660 955 1,988 Barnj'ard manure. 



409 715 1,405 Dissolved rock. 



515 635 1,291 Nothing. 



691 667 1.661 Nitrate and rock. 



810 690 1.822 Nitrate and potash. 



672 763 1,677 Armour's Special. 



488 674 1,387 Nothing. 



484 655 1,496 Potash. 



647 885 1,929 Nitrate, rock and potash. 



638 765 1,738 Rock and potash. 



698 890 1,825 Nitrate, rock and potash. 



676 637 1,542 Nitrate. 



32 335 608 768 1,711 Ammonia, rock and potash. 



The other factors in the rotation were beans, potatoes, and corn, all hoed crops. 

 It was to be expected therefore, that since the beets followed a hoed crop in a 

 rotation of which each member was a hoed crop the exhaustion of humus would 

 be rapid, and we should see a wide difference in the yield of the plot receiving 

 barnyard manure and those receiving commercial fertilizers only. The yield of 

 plot 2 was 1,988 lbs. as against 1,929 lbs for plot 24 receiving nitrate, phosphoric 

 acid and potash. This difference is immaterial and is a matter of surprise. The 

 nitrate of soda shows increased yields wherever applied. A study of the fi<?ures 

 In the columns reporting the total yields for three years shows that on the college 

 farm nitrogen, phosphoric acid and potash are aU needed, and th it the anD'i>'tion 

 of reasonable quantities is made with profit. What is true for the college farm In 

 this respect is undoubtedly true for most of the farms in' Michigan, to which on 

 the average less barnyard manure Is applied, 



VI, PBEVENTIOX OF LEAF BLIGHT BY SPBAYINO WITH BORDEAUX MIXTURE OR ilANUBINO 

 WITH NITRATE OF SODA OE COMMON SALT. 



This experiment was conducted in cooperation with the Department of Agri- 

 culture at Washington, Dr. C O. Townsend of the Bureau of Plant Industry, 

 Division of Vegetable Pathological and Physiological Investigations, kindly fur- 

 nished the seed and gave full directions for carrying out the work. 



On March 30th, fifteen pounds of Kleinwanzlebener beet seed was received from 



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