78 



Food for Plants. 



]\Iay 1st the potatoes were breaking ground, and 100 

 pounds of Nitrate of Soda per acre was applied on the 

 experiment plot. On the 1 Itli, 200 pounds of Nitrate was 

 a])])li(Hl, and on the 29th, 150 pounds more was cultivated 

 in with a horse-hoe. The total Nitrate application per 

 acre was 450' pounds. The nitrated plot was harvested 

 July 6th; the plot not treated with Nitrate was dug 

 July 17th, 11 days later. The nitrated plot produced 

 per acre 19 bushels unmarketable tubers, the non-nitrated 

 plot 46 bushels. The total crop marketable was 297 

 bushels for Nitrate, and 92 bushels for non-nitrated plot. 



450 lbs. Nitrate of Soda to the acre 

 in 3 api)lications. 



No Nitrate. 



Late Potatoes. 



Conditions same as in the case of earl}^ potatoes, 

 except the Nitrate of Soda was used at the rate of 500 

 pounds per acre. The crop of marketable tubers, per 

 acre on the nitrated plots, amounted to 374 bushels; on 

 the non-nitrated plot the yield amounted to 231 bushels 

 marketable tubers. The gain for Nitrate of Soda was 

 143 bushels, or nearly 62 per cent, increase. 



