1906.] PUBLIC DOCUMENT — No. 33. 17 



representing the average of special corn fertilizers purchas- 

 able in our markets. The crop of this year was hay, — 

 mixed timothy, red-top and clovers. The crops were sub- 

 stantially equal ; but, as the cost of fertilizers is lower where 

 the fertilizer richer in potash is used, the advantage is with 

 that combination of materials. 



V. — To determine the relative value in corn and hay 

 production of a moderate application of manure alone, as 

 compared with a smaller application of manure used in com- 

 bination Avith 1(30 pounds of high-grade sulfate of potash 

 per acre. The crop of this year was hay, — mixed timothy, 

 red-top and clovers. The larger average yield was pro- 

 duced on the combination of manure and potash ; and, as 

 this combination costs $6.40 less per acre than the larger 

 quantity of manure alone, the advantage in favor of the com- 

 bination is decisive. 



VI. — To determine which is better economy, to spread 

 manure as hauled from the stable during the winter, or to 

 place in a large heap to be spread in spring. This experi- 

 ment occupies five pairs of plots. The spring application 

 gave the better yield in all cases, but the difference was not 

 sufficiently large to cover the larger cost of the extra han- 

 dling involved in the case of the maniu'e spread in the spring. 

 The Avinter of 1904-05, hoAvever, Avas exceptionally favor- 

 able to good results from application at that season, as there 

 Avas little or no wash over the surface. 



VII. — To determine the economic result of using in rota- 

 tion on grass lands : the first year, barnj^ard manure, 8,000 

 pounds per acre ; the second year, Avood ashes, 1 ton per 

 acre ; and the third year, bone meal, 600, and muriate of 

 potash, 200, pounds per acre. The average yield of hay 

 during the past season, all tliree systems of manuring being 

 represented, on a total area of about 9 acres, is at the rate 

 of about 4,840 pounds of hay per acre. The average for the 

 thirteen years during Avhich the experiment has continued, 

 1893-1905, inclusive, is 6,479 pounds. 



VIII. — To determine whether the application of nitrate 

 of soda after the harvesting of the first crop Avill give a prof- 

 itable increase in the roAven crop. The increases produced 



