The Bulletin. 69 



This mixture will contain: available phosphoric acid, 9.5 per cent; 



potash, 3.4 per cent; nitrogen, 3.3 per cent (equal to ammonia, 4.0 



per cent). 



No. 12— 



Acid phosphate, 16 per cent phosphoric acid 1,295 pounds 



Dried blood, 13 per cent nitrogen 560 pounds 



Muriate of potash, 50 per cent potash 145 pounds 



2,000 pounds 



This mixture will contain: available phosphoric acid, 10.4 per 

 cent; potash, 3.6 per cent; nitrogen, 3.6 per cent (equal to ammonia, 

 4.4 per cent). 



No. 13— 



Acid phosphate, 14 per cent phosphoric acid 630 pounds 



Cotton seed, 3.1 per cent nitrogen, 1.3 per cent phosphoric 



acid and 1.2 per cent potash 1,100 pounds 



Kainit, 12.5 per cent potash ISO pounds 



2,000 pounds 



This mixture will contain : available phosphoric acid, 5.2 per cent ; 

 potash, 1.8 per cent; nitrogen, 1.8 per cent (equal to ammonia, 2.2 

 per cent). 



Cotton Seed and Nitrate of Soda. — The remarks under "Com" re- 

 garding these two fertilizing materials apply also to cotton, as do the 

 suggestions concerning the change in the quantity of nitrogen-supply- 

 ing materials in the formulas, should cotton follow peas or any other 

 leguminous crop. In Formula No. 3 one-fourth of the nitrogen is 

 supplied by nitrate of soda, with the view of giving the crop a quick 

 start, and in No. 2 one-half of the nitrogen comes from this source. 

 On light lands it will be good practice to omit this nitrate from the 

 mixture and apply it as a side dressing about the middle of June. 

 Good results come from the use of it in this way on heavy types of 

 land. Where land does not produce a good stalk of cotton, and fer- 

 tilizers are used which contain only a moderate amount of nitrogen or 

 ammonia, good results are obtained from a side dressing of 50 to 100 

 pounds of nitrate of soda per acre. The nitrate should be distributed 

 along one side of the row, or, where there is a ridge in the middle, it 

 may be put on this, and when the ridge is thrown out the nitrate will 

 be thrown on two sides of the row. 



Application of Fertilizer to Cotton. — The fertilizer should be ap- 

 plied in the drill at or just before planting. The quantity used for 

 cotton varies from 200 to 1,000 pounds per acre ; 400 to 600 pounds 

 are the more common quantities used of the grade of Formula No. 1. 

 Some of the mixtures in this Bulletin are much more concentrated 

 than No. 1, and when they are used the quantity may be reduced pro- 

 portionately. 



