28 The Bulletin. 



HAY. 



The above experiments were planned to show the effect on the 

 yield of hay of varying quantities of potash, the nitrogen and phos- 

 phoric acid remaining constant. On one plat one-half the normal 

 quantity of potash was applied, or about 11/2 per cent in the ferti- 

 lizer mixture, while on two other plats two and three times the 

 normal quantities were given, or 24 and 36 pounds per acre, the 

 percentage of potash in the highest application being somewhat in 

 excess of 9 per cent. While there are some variations in the yields, 

 the results show decreased rather than increased yields from appli- 

 cations of potash, and on none of the plats in either of the fields 

 were the profits from the applications of potash in any quantity as 

 great as from phosphoric acid alone. 



On the whole, these tests show that potash has decreased yields and 



profits. 



PEAS. 



The yields of peas presented in Table VI are from the same plats 

 as the hay yields shown in Table V, one-half of each plat being used 

 for obtaining the hay and pea yields respectively. In the four 

 years' experiments on the plats in Field C the increase in the yields 

 of peas was very small^ and not sufficient to overcome the cost of 

 fertilizer, which was used, in three out of four cases, at a loss. In 

 one year's experiments on the plats in Field A the fertilizer applica- 

 tion produced decided increase in pea yields, but the profits in only 

 two cases were greater than from phosphoric acid alone and in only 

 one from phosphoric acid and potash, and the increases in these 

 cases were not very large. 



Taking them altogether, the results show that increases in quan- 

 tities of potash have not profitably added to the yields of peas. 



HAY. 



The experiments, the results of which are presented in Tables VII 

 and VIII, were planned to show the effect on the yield of hay and 

 peas of varying quantities of phosphoric acid, the nitrogen and pot- 

 ash remaining constant. On one plat one-half the normal quantity 

 of phosphoric acid was applied, or a quantity represented by approxi- 

 mately 86 poimds of 14 per cent acid phosphate, an equivalent to 

 4 per cent phosphoric acid in the fertilizer mixture. To two plats 

 were applied two and three times the normal quantities of phosphoric 

 acid represented by 342 and 514 pounds of 14 per cent acid phos- 

 phate respectively, or approximately 11 and 12 per cent phosphoric 

 acid in the fertilizer applications. The results on the plats in both 

 fields in all the years show with marked unanimity decided increases 

 in the yields of hay for increased quantities of phosphoric acid. 



