This mixture will contain nitrogen 3.44, available phosphoric 

 acid 10.66 and potash 5.55 per cent. 



Apply broadcast just before plants are set and use from 

 eight to twelve hundred pounds per acre. 



For brussels sprouts, kohl-rabi and kale about the same 

 application will be useful. 



For rape use one-half to two-thirds the above amounts. 



If one grows these crops on a small scale only it will often be 

 preferable to use a ready mixed fertilizer having about the 

 composition of the mixture of chemicals recommended. There 

 is usually no saving in cost when chemicals must be purchased 

 in small quantities, and of course this practice involves rather 

 more trouble. 



When fertilizers only are to be used for 

 When Fertilizers these crops it is believed that they should 



Only Are Used, show about the same general composition 

 as the mixture above recommended for use 

 with manure; but a rather higher percentage of nitrogen will be 

 useful except after clover, alfalfa or other legumes, or on soils 

 in high fertility or containing a large proportion of humus, such 

 as reclaimed muck or peat. A portion of the nitrogen in a 

 fertilizer for this use should be derived from materials less 

 soluble and more slowly available than nitrate of soda, such 

 as cyanamid, tankage or bone. A part of the phosphoric acid 

 also may be in less soluble form than acid phosphate, and it is 

 believed an application of basic slag meal will be highly desirable. 

 This has the double advantage of furnishing available phosphoric 

 acid and a large amount of lime (mostly, it is true, in neutral 

 compounds), thus reducing, as has been pointed out, the necessity 

 for a separate application of lime in preparation for these crops. 

 It is believed that when the slag is used it will be found best to 

 apply it by itself on the rough furrow to be deeply worked in 

 by disking, and if some time before putting in the crop, so much 

 the better. The previous fall will be the best time. The useful 

 application will probably range from 600 to 1200 pounds per 

 acre, according to soil and crop. It will be desirable, especially 

 with soils low in fertility, to mix sulfate of potash with the 

 slag at the rate of 100 pounds per acre. 



In connection with this preparatory application of slag meal 

 and potash a mixture of chemicals made up in the following 

 proportions is recommended: 



