JSlEW York Agricultural Experiment Station. 327 



results were similar, though less marked, for the muriate in 

 combinations, when a second crop was grown on the same plats 

 without additional fertilizer; but the injurious effect of the 

 muriate alone had worn off, apparently, for the yield with it was 

 greater than on the check plats. 



Nitrate of soda with both muriate of potash and dissolved 

 bone black appeared beneficial, instead of injurious as when 

 combined with muriate alone. 



In this connection the results of Brooks and Thorason'si'^ field 

 experiments with onions are of interest. They found tha,t lim- 

 ing the soil or the free use of dissolved bone black overcame the 

 unfavorable effects from the continued use of muriate of potash 

 alone or the more unfavorable results when it is used with 

 nitrate of soda. The presence of sulphate of lime in the dis- 

 solved bone black probably accounts for the corrective influence 

 of the latter. 



Experiments at this Station^i from 1895 to 1898 devoted prin- 

 cipally to the merits of different soil mixtures for forcing lettuce, 

 were also planned to show the effects of some different fertil- 

 izers. On a soil containing 15.5 per ct. by weight (25 per ct. by 

 bulk) of manure, nitrate of soda gave a slight increase in growth, 

 but when the soil contained 33 1-3 per ct. of manure, the use of 

 the nitrate made no better growth. 



Acid phosphate, 600 lbs. per acre, and sulphate of potash, 400 

 lbs., did not increase the crop on the 15.5 per ct. manure soil; 

 but doubling these amounts of phosphoric acid a^d potash gave 

 later maturing and slightly heavier heads of lettuce than the 

 manure alone. The addition of 33 1-3 per ct. of manure to sandy 

 loam soil resulted in poorer crops of lettuce than were grown on 

 the same soil with commercial fertilizers. On clay loam the 

 manure gave excellent crops better than the fertilizers without 

 manure. The cumulative effect of fertilizers was not studied, 

 the soils being renewed each year. 



"Brooks, W. P., and Thomson, H. M. Mass. Hatch Sta. Ann. Kept. 

 1891:108-112. 



"Beach S. A. N. Y. Agrl. Exp. Sta. Bui. 146:151-179; also Ann Rept 

 1898:461^91. 



