Experimental Error in Crop Tests 
31 
50 hills with the desired number of plants and surrounded 
by a normal stand were harvested from each row. This was 
accomplished by planting 72 hills in each row, which per- 
mitted the elimination of any hills having less than the full 
stand. Thus all yields were comparable so far as number 
of plants was concerned. The plats have been replicated 
eight or more times each year, as indicated in the tables, 
in order to eliminate soil variations. 
ROW COMPETITION IX RATE-OF-PI.AXTIXG TESTS WITH CORX 
Tables 11, 12, and 13 contain three years' results with 
planting Nebraska White Prize corn at the rate of two and 
four plants per hill in alternating single-row and three-row 
Fig. S — A hill of checked corn planted by the ordinary method without 
spacing the plants in the hill. It contains two plants, altho the 
number cannot be readily nor accurately determined as with the 
space-planted hill 
