17 



Relative Values of Cottonseed, Cottonseed Meal and 



Nitrate of Soda. 



Such quantities of cottonseed, cottonseed meal and nitrate 

 of soda as contained equal amounts of nitrogen were used on dif- 

 ferent plots, and on all plots 240 pounds of acid phosphate and 30 

 pounds of muriate of potash per acre were also applied. The 

 amounts used per acre were 316 pounds of air dry cottonseed, 

 or 150 pounds of cottonseed meal, or 70^ pounds of nitrate of 

 soda. The cottonseed were bagged and moistened about a 

 month before they were applied to the field. All fertilizers 

 were put in the drill April 16. 



The results are shown in the following table : 



Results v)\th different forms of nitrogen. 



Plot 

 No. 



Amount 

 per acre 



I 



Lhs. 

 150 

 240 



30 

 816 

 240 



80 



70. V 

 240 



80 



Fertilizers 



« a r; 

 00 o 2 



Cottonseed meal . . . 

 Acid phosphate . . . . 

 Muriate of potash . 

 Cottonseed, rotted. 



Acid phosphate 



Muriate of potash . 

 Nitrate of soda. . . . 



Acid phosphate 



Muriate of potash . . 



1,074 



858 



1 035 



Per cent 



of crop at 



first 



picking 



35 

 45 

 40 



Per cent. 



of 



"rusted" 



plants 



10 

 20 

 10 



In this test cottonseed meal proved the best of the three 

 fertilizers compared. As a partial offset, there undoubtedly 

 remains in the soil a portion of the fertilizing material of the 

 cottonseed which may be expected to benefit the succeeding 

 crop. "Rust" was more abundant on the plot receiving cot- 

 tonseed, the amount on this plot being estimated at twice that 

 on either of the other plots. 



Relative Values of Different Phosphates. 

 Equal weights of Edisto high grade acid phosphate, Flor- 

 ida soft phosphate and Tennessee crude phosphate were com- 

 pared. At the suggestion of the Station Chemist, Prof. B. B. 

 Ross, a mixture of one-half acid phosphate and one-half Florida 



