ROW SPACING, PLANT AND EAR POPULATION - CORN
The Illinois Agricultural Statistics Service conducts corn objective yield
surveys each year. Randomly selected plots in corn for grain fields are visited
monthly from August through harvest to obtain specific counts and measurements.
Data in these tables are based on survey results but are not official
estimates. They are intended to show trends in corn for grain production
practices.
CORN FOR GRAIN: Percentage distribution by row width and average row
width, Illinois 1988-1997
| Year |
Number of
samples |
Row width
(inches) |
Average
row width |
30.5 &
less |
30.6-34.5 |
34.6-36.5 |
36.6-38.5 |
38.6 & greater |
| |
Percent |
|
Inches |
| 1988 |
231 |
52.0 |
17.3 |
12.1 |
14.7 |
3.9 |
32.5 |
| 1989 |
230 |
53.9 |
11.8 |
13.5 |
17.4 |
3.4 |
32.6 |
| 1990 |
236 |
49.2 |
16.5 |
14.8 |
17.0 |
2.5 |
32.5 |
| 1991 |
235 |
54.9 |
16.6 |
11.5 |
13.2 |
3.8 |
32.2 |
| 1992 |
233 |
57.9 |
13.3 |
14.2 |
13.7 |
0.9 |
32.0 |
| 1993 |
244 |
50.8 |
17.2 |
13.1 |
15.2 |
3.7 |
32.4 |
| 1994 |
241 |
52.3 |
21.6 |
9.1 |
11.6 |
5.4 |
32.1 |
| 1995 |
268 |
56.7 |
19.4 |
10.5 |
12.3 |
1.1 |
31.9 |
| 1996 |
257 |
63.4 |
14.4 |
10.9 |
9.3 |
2.0 |
31.7 |
| 1997 |
270 |
61.4 |
17.8 |
11.9 |
7.4 |
1.5 |
31.6 |
CORN FOR GRAIN: Plant population and ears per acre, Illinois, 1988-97
| Year |
Plant population |
Ears per acre |
| 1988 |
21,900 |
19,200 |
| 1989 |
21,900 |
21,000 |
| 1990 |
22,300 |
21,900 |
| 1991 |
23,700 |
21,800 |
| 1992 |
23,000 |
23,000 |
| 1993 |
23,300 |
22,600 |
| 1994 |
23,200 |
22,600 |
| 1995 |
23,650 |
22,850 |
| 1996 |
24,200 |
23,600 |
| 1997 |
24,900 |
23,400 |
Illinois Agricultural Statistics Service
Annual Summary - 1998 |
Page 56 |
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