354 INVESTIGATION BY CULTURE EXPERIMENTS 



The fertilizers applied per acre every four years (for the turnip 

 crop only) have been about as follows, where used: 



(a) FERTILIZERS FOR AGDELL FIELD, POUNDS PER ACRE, 1892 AND 



PREVIOUSLY 



(b) FERTILIZERS FOR AGDELL FIELD, POUNDS PER ACRE, 1896 AND SINCE 



Exceptions to these tabular statements are as follows: 



In 1848, about 40 pounds of nitrogen, 20 pounds of phosphorus, 

 and 60 pounds of potassium were applied, with no magnesium or 

 sodium salts. 



In 1852, about 30 pounds of phosphorus and only 100 pounds of 

 sodium sulfate were applied, otherwise the applications for 1852 

 were the same as shown in table, except as explained below. 



In 1884, the applications of alkali minerals were made for the 

 first time to the middle section and for that year were double the 



