14 • The Bulletin. 



acre ; and from $14.82 to $35.58 less clear profit per acre than the dif- 

 ferent plats receiving applications of nitrate of soda. In other words, 

 stating the average of the two years' results differently, it is seen by 

 data contained in the sixth cohimn of Table III tliat the plat (No.4) 

 fertilized at the rate per acre of 200 pounds of acid phosphate, 83 

 pounds of kainit and 100 pounds of nitrate of soda (25 pounds of the 

 nitrate being applied with the acid phosphate and kainit at plant- 

 ing and the remaining 75 pounds being used as a side-dressing 

 later in the season) was over two and one-quarter times as profit- 

 able as the unfertilized plat. The other plats, receiving normal 

 applications of phosphoric acid and potash with nitrate of soda 

 in different quantities and applied in different ways, were on an 

 average from one and one-half to almost two and two-tenths 

 more profitable than the plat without fertilization. Column five 

 of Table III shows that the clear profits from Plats 4, 3 and 5 

 were respectively $21.94, $19.26 and $17.31 more per acre than 

 from the plat (No. 2) receiving only acid phosphate and kainit. 

 As this later received exactly the same amount of acid phos- 

 phate and kainit as Plats 4, 3 and 5, it seems only fair to accredit 

 this increased profit to the .judicious use of nitrate of soda. Column 

 seven, Table III, shows that the profit from Plats 4, 3 and 5 were 

 1.48, 1.42 and 1.38 more respectively than from Plat 2 receiving 200 

 pounds of acid phosphate and 83 pounds of kainit per acre. Por 

 some reason the nitrate of soda and dried blood used on Plat 7 seem 

 to have done no good, as the yield of this plat is just about the same 

 as the plat (ISTo. 2) receiving only acid phosphate and kainit. (See 

 Fig. 3). JSTotwithstanding this fact, Plat 7 produced $14.82 more 

 profit per acre than the unfertilized plat. 



The profit from all the plats was larger in 1905 than in 1906, due 

 most likely to the extremely unfavorable season, during both the 

 gTowing and maturing of the cotton, that prevailed in 1906. 



CONCLUSIONS. 



The tentative conclusion, draAvu from these two years' tests with 

 cotton conducted on the sandy loam soil of the Edgecombe farm, 

 is that all of the different combinations of fertilizing materials em- 

 ployed were profitable ones ; but that the best one. becnuso the most 

 profitable, on an average, of the seven tests tried diiriuL:' the two years 

 was an application consisting of 200 pounds of acid phosphate, 83 

 pounds of kainit and 100 pounds of nitrate of soda per acre, the 

 nitrate application being divided and 25 pounds of it going in the soil 

 witli tlie acid phosplinte hnd kainit just before ]>1 anting the cotton, 



