130 



FERTILIZERS ON SANDY SOIL — SMITH. 



Fertilizer. 



K.SO. and NaNO 



" (NH,X,SO, 

 Farm manure . , 



Crop. 



. Grass . . 



<t 



. Potatoes 

 (( 



. Oats . . 

 . Barley 



Potatoes 



Year. 

 .1889 

 .1890 

 .1889 

 .1890 

 .1889 

 .1890 

 .1890 

 .1890 

 .1890 

 .1889 

 " ..1880 



Table I shows that the increase from 

 Nitrates used alone 

 Ammonia " 

 Nitrates and Ammonia 

 Potash 

 Phosphates 

 Nitrates and Potash 



" " Phosphates 



Ammonia and Potash 



" " Phosphates 



Potash and Phosphates 

 Nitrates, Potash and Phosphates 

 Ammonia, " " 



Farm Yard Manure 



Per Cent. 

 Increase. 



65.3 



155.8 



23. 



61.2 



43.3 



73.1 



107.7 



81.1 



8. 



65.5 



38.7 



Average 



75.6 



I 



36.7 



52.1 



averaged 17.4 



14.4 



. ; 20.8 



14.2 



24.9 



.'20.7 



25.4 



4.2 



11.2 



48.1 



75.6 



36.7 



52.1 



Of the three constituents. Phosphates gave the largest yield 

 when used alone, Phosphates and Nitrates the largest yield of 

 the two combined on potatoes, and Phosphates and Potash the 

 largest yield on grains. 



Nitrates gave better results than Ammonia, either alone or in 

 combination with the other fertilizers. 



These experiments have extended over about twenty -five acres 

 of the farm, and have been repeated a number of times. 



They seem to indicate that — 



Our soil has a similar composition over the entire farm ; 



All the above constituents when applied increase its fertility ; 



Phosphates appear the most useful ; 



