101 



RELATION OF PLANT FOOD CONTENT TO CORN YIELD 



acic/ So/ /Tia^/vr, r7t/ royen^ arrd /'//o s/>/ro ruS to Crop y/e/c/ 



/^5 /"er acre 



TABLE 1 



Volatile matter 2-3? 



A = Acid. 



X = Neutral or Slightly Acid. 



Y = Baaic. 



