22 Nebraska Experiment Station Research Bulletin 19 
grouped to represent more general regional areas. In the 
tables, the data are assembled by localities into eastern, central, 
and western Nebraska groups. 
NATIVE CORN /TYPES GROWN AT HOME 
MORPHOLOGICAL CHARACTERS 
METHODS OF STUDY 
During the years 1915 and 1916, detailed measurements 
were made of representative corn types grown in twelve counties 
scattered thruout the State. On an average, four representative 
fields were chosen in each county, and ten successive plants 
measured in a representative part of each field. The morpho- 
logical characters measured were: (1) Height of stalk, 
(2) height of ear, (3) leaf area, (4) grain weight, (5) ear 
weight, (6) stover weight, (7) total plant weight, (8) shelling 
per cent, (9) leaf area per gram dry matter produced, 
(10) length of ear, (11) circumference of ear, (12) length of 
kernel, (13) width of kernel. Bags were kept in the field for 
systematically gathering the dry leaves of the selected plants 
from time to time in order to conserve all the plant substance. 
Leaf areas were determined by E. G. Montgomery’s formula, i.e. 
% X length X maximum width. f At maturity all plants were 
harvested and assembled for uniform air drying in a warm room 
for several months in order that weights might be comparable. 
RESULTS 
The data for 1915 and 1916 are given separately in Tables 
7 and 8. The two years are averaged in Table 9. In Table 10 
the regional differences in plant characters are made more. 
+Montjfomery. E. G., 1911. Correlation studies of corn. Nebr. Apr. Exp. Sta. 24th 
Annual Report, p. 113. 
