80 Nebraska Agricultural Exp. Station, Research Bui. 13 
EFFKCT OF THE SIZE OF POT UPON THE GROWTH OF CORN 
In 1913 individual plants of Hogue's Yellow Dent corn 
were grown in pots of three different sizes. The results are 
summarized in Table 37. In pots containing 86, 245, and 
933 pounds of soil, the average total dry matter harvested 
per pot was respectively 165, 416, and 599 grams, while the 
average weights of ear corn were 28, 194, and 311 grams. 
In 1914, six sizes of pots were used, which contained 32, 
85, 150, 239, 583, and 956 pounds of moisture-free soil. Four 
pots of each size were cropped without manure and four with 
manure. The results are summarized in Table 38. Table 39 
shows in percentage the effect upon yields of increasing the 
pot size. Using the crop harvested in the smallest pots with- 
out manure as 100 per cent, the yields of total dry matter for 
the other sizes without manure were respectively 211, 324.1, 
453.6, 643.8, and 747 per cent. The yields of ear corn were 
respectively 100, 632.5, 1082.3, 2417, 2990, and 4046.7 per 
cent. 
Table 40 shows in per cent the effect of applying a uniform 
rate of manure to the pots of different sizes in 1914. The 
yield with manure is expressed in per cent of the yield with- 
out manure for each size. 
Table 40 — Showing in per cent the effect of applying a uni- 
form rate of manure to pots of different sizes. The results 
with manure are here expressed in per cent of the results 
without manure. Hogue's Yellow Dent corn (IQIJ^)"^ 
Size of pot 
Wt. of soil 
(moisture- 
free) 
Dry matter 
Ear Total 
Total 
leaf-area 
per plant 
Height of 
stalk 
Inches 
Pounds 
Per cent 
Per cent 
Per cent 
Inches 
12x12 
32.5 
822.5 
276.4 
165.6 
133.5 
12x24 
85.0 
293.6 
195.3 
116.2 
106.2 
16x24 
150.0 
249 2 
169 3 
101.8 
101.3 
16x36 
239.0 
118.9 
126.1 
110.7 
98.3 
21x36 
583.0 
114.1 
112.7 
107.4 
101.8 
30x36 
956.0 
102.9 
107.2 
101.4 
105.5 
=-=Data calculated from Table 38. 
Applying 1.75 pounds of moisture-free manure per pot 
increased the yields of total dry matter for the different sized 
pots respectively 176.4, 95.3, 69.3, 26.1, 12.7, and 7.2 per cent. 
Likewise, the manure increased the yields of grain per pot 
