Fertilizing the Commercial Apple Orchard 203 



ent when one realizes the marked difference in results ob- 

 tained in separate experimental orchards. It is wise to 

 try fertilizing on a small scale before assuming any large 

 financial risks. 



" This test should be located in a typical section of the 

 orchard and include not less than six average trees of the 

 same variety and age in each plot. It' is also best to have 

 the trees in double rows whenever possible and the plots by 

 a single row left unfertilized. All trees should be labeled 

 and carefully measured at-a fixed point on the trunk, and 

 the applications and exact records of both yield and growth 

 should be maintained for at least three years. Good in- 

 dications of an orchard's needs may often be obtained in 

 much less time, but at least this period should be allowed. 



(Rates are stated for each mature tree in bearing.) 



1. Check (unfertilized). 



2. Nitrate of soda, 5 lbs. 



3. Nitrate, 5 lbs.; acid phosphate (16 per cent P 2 5 ), 

 8 lbs. 



4. Nitrate of soda, 5 lbs.; potash (50 per cent. K a O), 

 2 lbs. 



5. Check. , 



6. Acid phosphate, 8 lbs. ; potash, 2 lbs. 



7. Nitrate, 5 lbs. ; acid phosphate, 8 lbs. ; potash 2 lbs. 



8. Manure, 400 lbs. 



9. Check. 



" Other carriers, such as ammonium sulphate or dried 

 blood, may be used for the nitrogen; and bone nleal or 

 possibly ' floats ' may be used for the phosphorus. The 

 present materials are likely to be best in the absence of 

 cultivation, however, and they are also quicker in their 

 action as a rule." 



