INFLUENCE OF SPACING ON PRODUCTIVITY OF CORN. 3 
production per plant, average weight of ear, and number of ears per 
plant, has been determined and the results tabulated. As the area 
per plant is increased it is obvious that an increase in production per 
plant will be either through an increase in the weight of the ear or an 
increase in the number of ears, or both. 
Fig. 3.— Large single-ear type of ear of 
corn, 12 inches long with 20 rows of 
kernels; weight (air-dried), 22 ounces. 
Fig. 4.— A prolific plant of corn having 
numerous ears but no suckers. Height, 
S feet 10 inches. 
If the development of the single-ear type has been along the lines 
suggested, the greatest response to better environment would be an 
increase in the weight of the ear, with the production of more oars 
per plant as a secondary response. In the prolific type the greatest 
response to better environment would be an increase in the number 
of ears per plant, with increased size of ear as a secondary response. 
As both types are grown extensively, it is of agronomic interest to 
know which yields more efficiently under ordinary field conditions 
