carried out, almost invariably use large quantities of stable ^°°^ ^°^ 



manure, and employ commercial fertilizers, if at all, simply ^ — 



to supplement the manure, it was decided to apply equal ^^i 

 amounts of thoroughly mixed stable manure to each plat 

 and to use in addition the same fertilizers as before. 

 Further, in order to have the best data for determining 

 whether the fertilizers should prove in any degree useful, 

 another plat was added to which manure alone was applied. 

 A number of different garden crops were grown, including 

 spinach, lettuce, table beets, tomatoes, and cabbage; and, 

 as a second crop, turnips. 



Spinach gave by far the best results with „ . , 



Nitrate of Soda. With sulphate of am- 

 monia it was almost an absolute failure, many plants dying 

 soon after germination and most of the others becoming 

 yellow and sickly. Sulphate of potash gave better returns 

 than the muriate. Similar results were obtained with beets. 

 Most of the plants on the sulphate of ammonia plats became 

 weak and sickly and many died. The results with tomatoes 

 were also in part similar. Sulphate of potash gave better 

 returns than the muriate, and Nitrate of Soda gave the best 

 yield of any of the sources of Nitrogen. This is thought to 

 be due to the fact that the tomato is not set until about the 

 first of June, and makes most of its growth when the season 

 is well advanced. By this time the injurious compounds 

 formed by the sulphate of ammonia have been washed away 

 by rain or destroyed by further chemical changes. The 

 crops that were injured by the sulphate of ammonia — spinach 

 and beets — are sown early and make most of their growth 

 before the season is far advanced. 



Lettuce yielded better on barnyard manure alone than 

 on the plats to which fertilizers were also applied. The 

 result is in line with results obtained at the New York State 

 Station, where it was found that "after the soil has received 

 a heavy application of stable manure, any further addition 

 of chemical fertilizers is only thrown away." Here, as 

 before, sulphate of ammonia was found to be highly injurious. 



Cabbage appeared to be somewhat benefited by the 

 addition of fertilizers to barnyard manure. The difference 

 in the effect of the different fertilizers was not very marked. 

 Nitrate of Soda appeared to be the best source of Nitrogen. 



