The Bulletin. 77 



No. 6— 



Acid phosphate 745 pounds 



Cotton-seed meal 1,140 pounds 



Sulphate of potash, high grade 115 pounds 



2,000 pounds 



This mixture will contain: available phosphoric acid, 6.6 per cent; 

 potash, 3.7 per cent; nitrogen, 3.8 per cent (equal to ammonia, 4.6 

 per cent). 



No. 7— 



Acid phosphate 885 pounds 



Dried blood 575 pounds 



Nitrate of soda 170 pounds 



Sulphate of potash, high grade 370 pounds 



2,000 pounds 



In this formula one-fourth of the nitrogen is derived from nitrate 

 of soda and the other three-fourths from dried blood. This mixture 

 will contain: available phosphoric acid, 6.2 per cent; potash, 9.2 per 

 cent; nitrogen, 5.2 per cent (equal to ammonia, 6.2 per cent). 



No. 8— 



Acid phosphate 874 pounds 



Cotton-seed meal 782 pounds 



Nitrate of soda 116 pounds 



Sulphate of potash, high grade 228 pounds 



2,000 pounds 



In this formula one-fourth of the nitrogen is derived from nitrate of 

 soda, and the other three-fourths from cotton-seed meal. This mixture 

 will contain: available phosphoric acid, 4.2 per cent; potash, 6.3 per 

 cent; nitrogen, 4.2 per cent (equal to ammonia, 5.1 per cent). 



Five hundred and seventy-five pounds of No. 8 is equivalent to 600 

 pounds of a mixture analyzing 4 per cent available phosphoric acid, 

 6 per cent potash and 4 per cent ammonia. 



Three hundred and fifty to one thousand pounds of these mixtures 

 should be used to the acre. 



The mixtures made from Formulas Nos. 2 and 3 are somewhat more 

 concentrated than that from No. 1, on account of cotton-seed meal 

 containing less ammonia than fish scrap and dried blood. The three 

 formulas are given to enable the use of any one of the three main 

 organic nitrogenous materials — dried blood, fish scrap and cotton-seed 

 meal. In the coastal sections fish scrap and meal are both easily ob- 

 tained ; some distance inland meal is more accessible, while in the more 

 western end of the tobacco belt it will be found convenient to use dried 

 blood. All three are good sources of ammonia for tobacco. The other 

 materials — nitrate of soda, sulphate of potash, and acid phosphate — are 

 the same for all mixtures. 



Occasional requests are made for formulas furnishing as much as 10 

 per cent of potash, and No. 4 has been arranged to meet needs of this 

 nature. It is known that excellent tobacco, in quality and quantity, is 

 grown by the use of fertilizers of this class, and some of our farmers 



