124 INDIAN CORN CULTURE. 
As no manure was used the yields are natur- 
ally small, but the balance in favor of the ro- 
tation is a large percentage. 
For 18 years rotation tests have been con- 
ducted on corn at the Illinois station.* Where 
corn, oats and clover were grown in rotation a 
decided gain in yield of corn was secured over 
those plats which did not receive a dressing of 
commercial fertilizer, that were not in rotation, 
Systems of rotation.—There are numerous 
rotations including corn which are satisfactory. 
On the Purdue University farm a rotation of 
corn, oats, wheat, clover sown on wheat in 
early spring of third year, and cropped fourth 
and fifth years, proves quite satisfactory. To 
favor large cropping stable manure is well dis- 
tributed over the clover stubble before it is 
plowed in. The corn has a fertile field and its 
cultivation cleans it of weeds in good shape for 
the crops which follow that receive no hoeing. 
The oat plant is a gross feeder, and following 
after the corn it finds the ground well enriched 
with the available food in the roots and stubble 
and the manure previously applied. 
For the Southern States where red clover 
will grow, Gulley recommendsy the following 
five-year rotation: Corn; clover on corn stub- 
*Tllinois agricultural experiment station, Bulletin No, 
30, p. 357. 
} First Lessons in Agriculture, 1892, p. 86. 
