Food for 



- _ 



9 8 



niain point, however, is to determine whether it 

 is a paying proposition, and the following tables show 

 the yield and value of crops, as well as the profits 

 derived when mineral fertilizers only are used, and also 

 when Nitrate of Soda is used in addition. 



Yield of Crops in 1905. 



UPLAND. LOWLAND. 



Without With 200 Ibs. Without With 200 Ibs. 



Nitrate. Nitrate Nitrate. Nitrate 



per acre. per acre. 



Yield per acre. . 3,180 Ibs. 8,340 Ibs. 6,985 Ibs. 8,712 Ibs. 

 Increase from Ni- 



trate ......... 5,160 Ibs. 162% 1,727 Ibs. 24.7% 



Crop of Grass Grown by Nitrate Top-Dressing. 1906. 



These results are strikingly significant, showing in 

 the first place the difference in adaptability of the two 

 soils for hay growing. The upland was deficient in 

 humus, and being dry and gravelly, was unable to pro- 

 vide Nitrogen in any quantity although an abundance 

 of minerals was present. The lowland, on the other 

 hand, containing a large proportion, was capable of fur- 



