Thus we had attained our object. The dressing of 264 Food for 



pounds of Nitrate of Soda had produced an additional yield ants 



of 968 pounds of grain, and therefore had worked satisfac- I77 

 torily. 



Example II. 



In the second example, the soil was poor. Under aver- 

 age conditions, on the unfertilized soil, we could not reckon 

 on more than 2112 pounds of grain, and assumed 3168 

 pounds of barley as an attainable yield. We therefore planned 

 to obtain an increase of yield of 1056 pounds of grain and 

 we, therefore, fertilized, as in the other case, with 264 

 pounds of Nitrate of Soda, of which the half was applied at 

 the time of sowing and the other half five weeks later. The 

 yield was as follows : 



Without Nitrate of Soda 1936 Ibs. of grain were obtained. 

 With Nitrate of Soda 2816 Ibs. of grain were obtained. 



Therefore, the 264 pounds of Nitrate of Soda had pro- 

 duced 880 pounds of grain. The dressing of Nitrate of Soda 

 had not been able to produce its full effect in consequence of 

 great drought. Each 88 pounds of Nitrate of Soda had pro- 

 duced only 293 pounds of grain. It would have been more 

 advantageous in this case, if we had applied only 220 pounds 

 of Nitrate of Soda. The yield, however, was completely sat- 

 isfactory. 



Example III. 



In the third example, the soil for barley was rich. With- 

 out a dressing of Nitrate of Soda, we could reckon on a yield 

 of about 2640 pounds of grain, and we could assume as a 

 maximum yield 3520 pounds of grain. We therefore aimed 

 at an increase of yield of 880 pounds of grain, for which, 

 according to our calculation 220 pounds of Nitrate of Soda 

 were required. This dressing was applied, and the result 

 was: 



Without the dressing of nitrogen 2640 Ibs. of grain were obtained. 

 With the dressing of Nitrate of Soda 3696 Ibs. of grain were obtained. 



The dressing of Nitrate of Soda had brought about an 

 additional yield of 1056 Ibs. of grain; that makes for 100 

 Ibs. of Nitrate of Soda, 480 Ibs. of grain, so that the action 

 of the Nitrate has been extremely effective. 



