38 HATCH EXPERIMENT STATION. [Jan. 



It will be noted that the manure alone gave much the 

 largest crop.* Discussion as to the effect of the fertilizers, 

 then, hardly seems called for. It is not without interest, 

 however, to note that the crops where sulfate of ammonia 

 was employed were much the smallest in the field. The re- 

 sult last year was similar in this respect. 



Hanson Lettuce. — In harvesting this crop the heads of 

 market size were cut from day to day. The total yields 

 per plot in pounds were : plot 0, 83.1 ; plot 1, 54.75 ; plot 

 2, 129.25; plot 3, 150.50; plot 4, 88.5; plot 5, 148; plot 

 6, 122.25. 



The average yields in pounds on the different fertilizers 

 were : — 



Manure alone (plot 0), 



Manure and muriate of potash (plots 1, 2 and 3), 

 Manure and sulfate of potash (plots 4, 5 and 6), . 

 Manure and sulfate of ammonia (plots 1 and 4), 

 Manure and nitrate of soda (plots 2 and 5), 

 Manure and dried blood (plots 3 and 6), . 



83.1 

 111.5 

 119.6 



71.6 

 138.6 

 136.4 



The sulfate of potash proves somewhat superior to the 

 muriate ; but the most marked result is the highly unfavor- 

 able influence of the sulfate of ammonia. This, as in pre- 

 vious years, in combination with the muriate of potash acts 

 as a plant poison. 



Spinach. — This, like the lettuce, was cut from time to 

 time as it became ready for market. The yields in pounds 

 of the several plots were ; plot 0, 83.8 ; plot 1,3; plot 2, 

 36.8 ; plot 3, 46.5 ; plot 4, 42 ; plot 5, 75.25 ; plot 6, 56.5. 



The averages on the several fertilizers in pounds were : — 



Manure alone (plot 0), . 



Manure and mvariate of potash (plots 1, 2 and 3), 

 Manure and sulfate of potash (plots 4, 5 and 6) , . 

 Manure and sulfate of ammonia (j^lots 1 and 4), . 

 Manure and nitrate of soda (plots 2 and 5) , . 

 Manure and dried blood (plots 3 and 6) , 



83.8 

 28.8 

 57.9 

 22.5 

 56.0 

 51.5 



It is noticeable that manure alone produces a considerably 

 larger crop than manure with any combination of fertilizers. 



* In explanation of this fact, it should be pointed out that plot previous to 1898 

 had entirely different manuring and cropping from the other plots. See last annual 

 report. It is not believed that the fertilizers were injurious, as a rule. 



