114 



FOOD FOR PLANTS 



yielded at the rate of 411 boxes of high quality fruit. 

 A plot alongside fertilized without Nitrate gave a 

 rate of yield of only 322 boxes per acre of inferior 

 fruit. This difference of yield of 89 boxes per acre 

 due to tfie use of Nitrate sfiows an increase in value 



Results at Corona. 



32.2 Boxes Oranges. 

 Yield of 1/10 acre 

 fertilized with Acid 

 Phosphate alone. 



41.1 Boxes Oranges. 

 Yield of 1/10 acre 

 fertilized with Ni- 

 trate of Soda and 

 Acid Phosphate. 



of produce equivalent to $324.85. Each 100 pounds 

 of Nitrate of Soda used in this case added a rate of 

 profit to the grower's income of $101.52 per acre. 



The best source of Nitrogen for citrus fruits is 

 Nitrate of Soda, because of its instant availability. 

 Growth is promoted at once after application is made. 

 It is taking chances to apply any nitrogenous ferti- 



