Field Eci"periments in Manuring, 1903-4. 701 



effect shown by eacli, both in combmation with superphosphate and 

 Thomas phosphate alone, as well as with the combination of each of 

 these phosphatic forms with a nitrogenous manure. 



13. Chloride of potash used with sulphate of ammonia — a com- 

 bination in which poisonous compounds resulting under certain 

 conditions are supposed to act injuriously to plant life — appears, with 

 a few exceptions, to have produced results closely corresponding to 

 those obtained from a combination of potash sulphate with the same 

 ammonia salt. 



14. The financial aspects of the results of the experiments are 

 most satisfactory, and, taking the mean of the extreme prices ruling at 

 different periods for the crop experimented on as a basis for calculation, 

 it appears that for an expenditure of from 12s. to 15s. per acre in 

 manure, increased returns of a money value, taking a low estimate, of 

 from 3Us. to 40s. might be expected. These remarks are not, of 

 course, intended to apply to soils of a well recognised exceptionally 

 high fertility requiring no fertilization. The productivity of his farm 

 will indicate to each farmer the necessity or otherwise of considering 

 in his case the questions here dealt with. 



