I ST U ART] 



EXPERIMENTAL WORK WITH FERTILIZERS 



175 



Table II. — To Obtain the "Minimum" for Various Mixtures 

 (Rotation of three years' duration) 



Illustration — \ N to be applied as NaN0 3 (15% N). 



\ N to be applied as (NH 4 ) 2 S0 4 (20%N). 

 è N to be applied as Acid Phosphate (16% P 2 6 or 7%K). 

 è P to be applied as Basic Slag (16% P 2 O s or 7%K). 

 All K to be applied as KC1 (48% K 2 or 40% K). 



Lbs. Elements Per Acre 



