-12- 



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 set. At this time soluble 

 nitrogen carelessly used can injure the plant. Wait until the plants are estab- 

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

 plants on a clear, dry day. 



10-10-10 (column 2) is rapidly becoming a standard formula. 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 4 is given a combination of 10-10-10 to be applied in 

 April and sulfate of ammonia to be applied June 1. Sulfate of ammonia, containing 

 20 percent nitrogen, is too strong for very young plants and replaces only 1/3 of 

 the nitrogen 2 yrs. 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. 



John S. Bailey 



I I I I I I I I I I I I I I 



