i01 
RELATION OF PLANT FOOD CONTENT TO CORN YIELD 
Aesatior Of volari/e rarfer, 
acid 60/ matrer, i +rogen, and phosphorus tocrop yie/d 
noe 
of 
aia 
7 
Bus. Per acre 
~ 
cy 
RS 
Pigs 
~ 
INE 
Ah Gs 
— 
Pe 
’ /bs. fer acre 
TABLE 1 
Volatile matter 2-3°%. 
Ei) eres er oe OO ie eee WA* 45 2.24 2081. 837. 1.41 1.01 10.5 
LN is le wa 5 oe ee NES 15 2.58 2595. 975. 2.26 0.70 4.5 
DEBE SN coshiae lasek Y* 15 2.97 3115. 1542. 2.48 0.45 
AQIB re SUn eee ccicee Y* 50? 2.95 2742. 917. 1.77 0.25 4.5 
AVOFALEs rcs ost. 28.7 2.68 2634. 1068. 1.98 0.602 6.5 
A = Aci 
2. Neutral or Slightly Acid. 
Y = Basic. 
