66 



The Bulletin 

 Table VI. — Continued. 



EFFECT OF VARYING QUANTITIES OF] POTASH. 



EFFECT OF VARYING QUANTITIES OF FERTILIZER. 



RESULTS WITH COTTON AT RALEIGH. 



Ejfect of Nitrogen, Phosphoric Acid, Potash and Lime in Combina- 

 tions. — The experiments, tlie results of which are presented in Table VI 

 were planned to determine the efl'ect upon the yield of cotton when two 

 of the constituents were applied together, as nitrogen and phosphoric 

 acid (N P), nitrogen and potash (N K), and phosphoric acid and potash 

 (P K), and when all three of the fertilizing constituents were applied to 

 make a complete fertilizer (N P K) ; also to test the effect of lime (L) 

 when used alone and when used in connection with a complete fertilizer 

 (jSTPKL). The results are shown in yields of seed cotton per acre 

 for the several years, average yields, average increases over the unferti- 

 lized (0) plats which represent the effect of the fertilizer applications, 

 the value of increase, cost of the fertilizer, and value of the increased 

 vields over cost of fertilizer. 



