1050 
Journal of Agricultural Research 
Vol. XXXI, No. 11 
The large stalks suffered less than the small ones and the line of 
growth shows a greater angle of elevation; this period is represented 
by the flattened portion of the graph. The lines of growth separate 
immediately after the corn comes up and they never again unite. 
Large seeds have more reserve food material than small ones, and 
this seems to be the factor which determines the difference in the 
initial growth. The germinator showed, as previously stated, that 
the root systems of the plants from the large kernels were much 
larger than from the small ones and these provide a means of sup¬ 
plying the plants with greater quantities of food materials from the 
soil. It is believed that these two factors are responsible for the 
difference in growth and time of development in the two types. 
Figure 1 shows also that there is a difference of five days in tasseling, 
silking, and reaching the canning stage between com grown from 
large and com grown from small kernels, a fact which accounts for 
the unevenness of maturity found in fields of sweet corn grown for 
canning purposes. 
The height of the plant was measured by taking the highest point 
reached when the leaves were held upright, except the final measure¬ 
ment, which was taken from the tip of the tassel when it had stopped 
growing. The diagneter of the stalks at the base was taken in the 
middle of the first internode and shows a constant enlargement in 
proportion to the height of the plant. 
Table III gives a part of the data collected in the plant growth 
studies which could not be expressed in the preceding graph. The 
results reported in the table are very consistent and substantiate the 
observations made at Shelbyville, Ind., the same year, and also the 
results obtained at the station the previous year. At 9 days of age 
the plants from the large seed averaged 4.15 inches taller and 0.048 
inch greater in diameter than the average from the small seed and 
2.05 inches taller and 0.023 inch greater in diameter than the average 
from the ungraded seed. 
