FE1.TILIZ£R APPLICATIONS FOti CULTIVATED BLOEBERRIES 



V/hat kind of fertilizer shall I use for cultivated blueberries and how much? 

 Tne table below attempts to ansvcer these questions. 



Other fertilizer mixtures may be as good as those listed. The amounts 

 suggested are to serve only as guides. The amount used should be based on the 

 size, vigor and productiveness of the bushes, ^iiihere fields are in heavy sod or 

 have been recently mulched with shavings, sawdust or other woody material, it is 

 usually desirable to increase the nitrogen 50-100 percent, 



In column 1, indicates the year the plants are setc At this time soluble 

 nitrogen carelessly used can injure the plant, lu'ait until the plants are estab- 

 lished, about June 1, to apply the fertilizer. Spread it out vrell around the 

 plants on a clear;, dry day, 



10-10-10 (column 2) is rapidly becoming a standard fomula. The quantities 

 recommended should be increased or decreased as experience indicates. It may be 

 desirable the second or third year to split the application - half before bloom 

 and half about June 1, 



In columns 3 and k is given a combination of 10-10-10 to be applied in April 

 and sulfate of amiiionia to be applied June 1, Sulfate of ammonia, containing 20 

 percent nitrogen, is too strong for very young plants and replaces only l/3 of 

 the nitrogen 2 years after planting, Thereafter it can replace more. 



The sulfate of ammonia only program in column 5 is for older bushes and for 



those which have been receiving liberal amounts of complete fertilizer. Since 



blueberries probably need all the elements, it is advisable to use an application 

 of complete fertilizer every third or fourth year. 



Column 6 gives the amount of 7-7-7 fertilizer which would be required to 

 give the same amount of nitrogen as the 10-10-10 mixture. 



Column 7 gives the amount of 5-8-7, 5-10-5, 5-10-10, or any other fertilizer 

 containing 5 percent nitrogen, required to give the same amount of nitrogen as the 

 10-10-10 mixture. 



The last column reduces the quantities in column 7 to amounts suitable for 

 10 bushes . 



J. S. Bailey 



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