PLANT NUTRIENTS RE- 
QUIRED BY THE CORN 
CROP 
For continued big crops of corn, we 
must replace at least part of the plant 
nutrients removed by the crop. Fertility 
reserves in the soil are slowly being liber- 
ated and can supply part of the needs of 
the growing crop, but some replacements 
are needed to maintain good soils in a high 
state of fertility. The following table em- 
phasizes cur tremendous assignment in 
maintaining fertility balances. Amounts 
of nitrogen, phosphorus (phosphoric acid 
P.O;) and potassium (potash K,O) needed 
by the crop have been calculated from 
many analyses. — ‘ 
Requirements to Produce a 100 Bushel 
Corn Crop . 
Pounds Required 
Nitrogen Phosphoric Potash 
CROP UNITS Acid P:0; K:O 
100 bu. grain 95 38 25 
3 tons stover Ss? 18 82 
TOTAL 152 56 107 
For Efficient Growth— 
12 Funk’s G-Hybrids — 
