The Bulletin. 



13 



RESULTS OF NITRATE OF SODA TESTS. 



In 1905, Plats 4, 5 and 3, in the order given, produced the highest 

 yields and greatest clear profit over cost of fertilizers; while in 1906, 

 Plats 3, 4 and 5 were the largest producing plats of seed cotton as 

 well as the most profitable ones. It will be noticed that the same 

 three plats in the two years' tests are the largest and most profitable 

 yielders, but the order of yields and profits is different in the different 

 } ears. As an average of the two years' results, the most profitable ap- 

 plication was that given to Plat 4 (see Fig. 2), receiving 200 pounds 



Fig. 2 — Cotton grown at Edgecombe Farm and fertilized with 200 pounds of Acid Phosphate, 50 

 pounds of Manure Salt and 75 pounds of Nitrate of Soda; 25 pounds of the Nitrate going in with other 

 materials at planting, and the remaining 50 pounds of Nitrate applied as a side-dressing on July 27. 



of acid phosphate, 83 pounds of kainit and 100 pounds of nitrate of 

 soda, 25 pounds of the nitrate being applied with other materials at 

 planting and the remaining- 75 pounds reserved and used as a side- 

 dressing June 28 in 1905 and July 27 in 1906. The applications 

 received by Plats 3 and 5 were close second and third. It is very 

 striking, as seen in Table III, that the plat (No. 1) to which no fer- 

 tilizer was applied is the one in both years that gave decidedly the 

 smallest clear profit. The selling price of total products (lint and 

 seed) from this plat averaged $16.32 less profit than those from Plat 

 2, receiving 200 pounds of acid phosphate and 83 pounds of kainit per 



