value of the three crops, also of the four best yields of each 

 and of the sum of the three crops. 



Value of ihree crops (corn, oats, hay,) per acre with different manures. 



No fertilizer, $70.07. 



Potash alone, $94.74. 

 Phosphoric acid alone, $73.66. 

 Phosphoric acid and potasli, $111.43. 

 Phosphoric acid and nitrogen, $56.99. 

 Phosphoric acid, potash and nitro2;en, $103.95. 

 Prepared fertilizers. $9q.67. 

 Complete chemicals, $108.56. 

 Potash and nitrogen, $101.79. 

 Ashes, $107.94. 



SCALE, yi inch equals $5.00. 



$3 ^zo, :$40. 



19 



