UNIVERSITY OF ARIZONA Food for 



AGRICULTURAL EXPERIMENT STATION. ^""'' 



Timely Hints for Farmers, No. 31. 



April, 1901. 

 W. W. SKINNER. 



A fertilizer of about the composition given below has 

 frequently been advised by the Station ^or fertilizing orange 

 orchards, and is believed to be in every way suited to the 

 purpose. It should be applied at the rate of from 500 to 

 1,500 pounds to the acre, according to age of trees and 

 quality of soil, and " plowed in deeply at the edge of the 

 branches, about the beginning of the growing season." 



Formula. 



6 per cent Nitrogen, from organic material. 

 I per cent Nitrogen, from Nitrate of Soda. 

 I y^ per cent potash, from sulphate of potash. 

 6y^ per cent available phosphoric acid. 



which in certain cases can be compounded with economy 

 by the farmer himself from the following materials : 



Pounds. 



Bone tankage, (lo per cent ammonia) looo 



Nitrate of Soda 1 40 



Sulphate of potash 60 



Dissolved bone (16 per cent available phosphoric acid) 800 



PURDUE UNIVERSITY, 

 INDIANA AGRICULTURAL EXPERIMENT 



STATION. 



LAFAYETTE, IND. 



C. S. PLUMB, Director. 



Bulletin No. 84. 



September, 1900. 



Growing Lettuce With Chemical Fertilizers. 



By WILLIAM STUART. 



The subject of lettuce culture with chemical fertilizers 

 was undertaken by the writer some years ago, and has been 

 continued as circumstances permitted up to the present 



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