476 



or until the mixture has a uniform color. Then throw it through 

 the screen to remove the lumps and to complete the mixing; the 

 lumps may then be mashed with the tamper and rescreened. The 

 mixture is now ready for bagging and use, and if care has been 

 exercised in selecting the materials it will not cake or deteriorate. 

 The following series of formulae for home mixed fertilizers is 

 highly recommended by the Texas Experiment Station. The farmer 

 knowing the special needs of his soils can from these readily choose 

 the fertilizer that will give the best returns. 



Formula I. 8-2-2 Fertilizer. 



This fertilizer contains 8 per cent available phosphoric acid, 2 

 per cent potash and 1.65 per cent nitrogen. It may be prepared by 

 mixing the following ingredients : 



Acid phosphate, 14 per cent 1170 pounds. 



Cottonseed meal 490 pounds. 



Kainit 340 pounds. 



Total 2000 pounds. 



Formula II. 8-2-2 Fertilizer. 



Acid phosphate, 14 per cent 900 pounds. 



Tankage 560 pounds. 



Kainit 340 pounds. 



Filler 200 pounds. 



Total 2000 pounds. 



This formula differs from formula No. I in that the nitrogen is 

 secured from tankage instead of from cottonseed meal. The tankage 

 is assumed to contain 6 per cent of nitrogen, and 6 per cent of avail- 

 able phosphoric acid. If its composition were different, the formula, 

 of the mixture would, of course, be different. 



Any indifferent material can be used as a filler. In home mix- 

 ing, however, it would be unnecessary to use a filler. Simply apply 

 less of the fertilizer. 



Formula III. 8-3-3 Fertilizer. 



Acid phosphate, 14 per cent 1170 pounds. 



Cottonseed meal 730 pounds. 



Muriate or sulphate of potash 100 pounds. 



Total 2000 pounds. 



This fertilizer contains 8 per cent available phosphoric acid, 3 

 per cent of potash, and about 2.5 per cent nitrogen. It may be used 

 on cotton or corn, or on vegetable crops that do not require much 

 potash or nitrogen. 



Formula IV. 8-3-3 Fertilizer. 



Acid phosphate 1000 pounds. 



Cottonseed meal 650 pounds. 



Nitrate of soda 100 pounds. 



