PRODUCTION AND AGRICULTURAL USE OF SODIUM NITRATE 9 



duplicate the mixture the following season if it gives satisfactory 

 results. Another reason that sodium nitrate is widely used in home- 

 mixing operations is that it is not only a standard product but is 

 procurable at practically all points in the fertilizer-using sections. 

 The following formulas, using sodium nitrate for home mixing, are 

 given for examples: 



Mixture 1 Parts 



Nitrate of soda 1 



Cottonseed meal 3 



This mixture has been used as a top dressing for lawns. 



Mixture 2 (5-10-5 1 ) Pounds 



Nitrate of soda (15.4 percent N) 200 



Sulphate of ammonia (20.8 percent N) 200 



Tankage (7.5 percent N and 9 percent P 2 5 ) 400 



Superphosphate (17.4 percent P 2 5 ) 946 



Muriate of potash (51 percent K 2 0) 196 



Filled 58 



Total 2,000 



1 Percentages, respectively, of nitrogen, phnpshoric acid, and potash. 



2 Sand is often used as a filler. From the viewpoint of soil fertility, other materials, such as ground raw 

 phosphate rock, pulverized limestone, prepared peat or garbage tankage, are preferable. 



This fertilizer formula has been used for vegetables. 



Mixture 3 (2-8-8) Pounds 



Nitrate of soda (16 percent N),--i 200 



Cottonseed meal (5.76 percent N) 139 



Superphosphate (16 percent P 2 5 ) 1, 000 



Muriate of potash (50 percent K 2 0) 320 



Filler 341 



Total 2,000 



This mixture has been suggested for corn, small grains, and grasses 

 on soils high in humus. 



Mixture 4 (5-8-4) Pounds 



Nitrate of soda (16 percent N) 207 



Ammonium sulphate (20.5 percent N) 161 



Cottonseed meal (7.5 percent N) 442 



Superphosphate (18 percent P 2 5 ) : 889 



Muriate of potash (50 percent K 2 0) 160 



Filler 141 



Total 2,000 



The nitrogen in this formula is one-third from organic sources, one- 

 third from ammonium sulphate, and one-third from sodium nitrate. 

 This mixture has been used for cotton. 



Mixture 5 (3-8-8) Pounds 



Nitrate of soda (16 percent N) 125 



Ammonium sulphate (20.5 percent N) 97 



Cottonseed meal (7.5 percent N) 266 



Superphosphate (18 percent P 2 5 ) 889 



Muriate of potash (50 percent K 2 0) 320 



Filler "_ 303 



Total. .__ 2,000 



