Table 1. Expected corn grain yield due to various planting dates and final plant populations |
||||||||||||||
Planting Date |
Plant populations (final) per acre. |
|||||||||||||
10,000 |
12,000 |
14,000 |
16,000 |
18,000 |
20,000 |
22,000 |
24,000 |
26,000 |
28,000 |
30,000 |
32,000 |
34,000 |
36,000 |
|
Percent of optimum yield |
||||||||||||||
10-April |
62 |
68 |
73 |
78 |
82 |
85 |
88 |
91 |
92 |
93 |
94 |
94 |
93 |
91 |
15-April |
65 |
71 |
76 |
81 |
85 |
88 |
91 |
94 |
95 |
96 |
97 |
96 |
96 |
94 |
20-April |
67 |
73 |
78 |
83 |
97 |
90 |
93 |
96 |
97 |
98 |
99 |
98 |
98 |
96 |
25-April |
96 |
74 |
79 |
84 |
88 |
92 |
94 |
97 |
98 |
99 |
100 |
100 |
99 |
97 |
30-April |
68 |
74 |
79 |
84 |
88 |
92 |
95 |
97 |
99 |
100 |
100 |
100 |
99 |
97 |
05-May |
67 |
73 |
79 |
82 |
87 |
91 |
94 |
96 |
98 |
99 |
99 |
99 |
98 |
97 |
10-May |
65 |
71 |
77 |
82 |
86 |
89 |
92 |
94 |
96 |
97 |
97 |
97 |
96 |
95 |
15-May |
63 |
69 |
74 |
79 |
83 |
87 |
89 |
92 |
93 |
94 |
95 |
95 |
94 |
92 |
20-May |
59 |
65 |
71 |
75 |
80 |
83 |
86 |
88 |
90 |
91 |
91 |
91 |
90 |
89 |
25-May |
55 |
61 |
66 |
71 |
75 |
79 |
81 |
84 |
85 |
86 |
87 |
87 |
86 |
84 |
30-May |
49 |
55 |
61 |
65 |
70 |
73 |
76 |
78 |
80 |
81 |
81 |
81 |
80 |
79 |
Source: Nafziger. 1994. J. Prod. Ag 7:59-62 |