18 BULLETIN 1321, U. S. DEPARTMENT OF AGRICULTURE 
(5) Because of varietal differences, the substitution of weight of 
cob for weight of earin C. I. No. 77 and butt circumference for number 
of kernels per row in C. I. No. 133 gave a better three-character pre- 
dicting equation in these varieties than that mentioned in paragraph 4. 
(6) Selecting longer, heavier ears with proportionately heavy cobs 
and with relatively few rows of wide, thick Kernels is warranted as a 
means of obtaining a supply of good seed for general planting. 
(7) Selection from among good seed ears on the basis of ear char- 
acters as a method of corn breeding is not warranted. 
