2lS 



'Food for granite soils and the largest money returns per acre were 

 Plants • . • ... 



obtained from the plots which were fertilized with phos- 

 phate during 1901-2. On red soil with oats the gain from 

 the use of Nitrate of Soda on the plot which had phosphate 

 the year previous was $11.70 per acre, as against only 

 ^3.72 per acre where the nitrate was used on land having 

 no previous fertilization. 



On granite soil with oats, there was no gain from the 

 phosphate. The use of Nitrate of Soda alone without pre- 

 vious fertilization yielded $9.44 per acre profit, while on the 

 plots having phosphate applied the previous year, the gain 

 was only $5.74 per acre. 



The heaviest yield of hay and the largest profit per acre 

 in 1903 were obtained with wheat on granite soil which had 

 an application of Thomas slag, sulphate of potash, and lime 

 in 1902. Nitrate of Soda was used at the rate of 320 pounds 

 per acre in 1903. The yield of hay was 5,772 pounds per 

 acre, and the resulting profit $12.89 per acre. It should 

 be remarked here, however, that this plot was fertilized at 

 a loss of $21.50 per acre in 1902; and as the application 

 of nitrate was larger than was used on any other plot, the 

 increased returns were at least partly due to the increased 

 supply of the nitrate. Through some misunderstanding, 

 there was no no corresponding wheat plot on granite soil 

 with nitrate only. 



The use of sulphate of potash in combination with Ni- 

 trate of Soda, on granite soil, did not pay in 1903. Potash 

 was used at the rate of 300 pounds per acre. In most cases 

 the fertilizer cost more than the increased crop of hay; hence 

 its use incurred a loss of from 76 cents to $4.57 per acre. 



The experiments with Nitrate of Soda used alone were- 

 broadened in 1903 to test the efficacy of different amounts 

 per acre and the division of the application into two doses. 

 The results show that in 1903, 160 pounds of Nitrate of 

 Soda per acre in one application yielded the largest profits, 

 viz.: $9.44 and $8.90 per acre, respectively, on two plots 

 on granite soil. In all cases the yield was reduced when 

 the fertilizer was put on in two applications; thus, with 

 160 pounds per acre applied in two doses, only $4.82 and 

 $7.27 per acre were yielded by two plots on granite soil. 



