 |
ProCrop |
Determining Soybean Plant Populations and Potential Yields
|
Row Width |
*Area (ft2) |
**Multiplier |
|
6" |
1.5 |
29,040 |
|
7" 8" 9" |
1.75 2.0 2.25 |
24,891 21,780 19,360 |
|
10" |
2.5 |
17,424 |
|
12" |
3.0 |
14,520 |
|
14" |
3.5 |
12,446 |
|
15" |
3.75 |
11,616 |
|
18" |
4.5 |
9,680 |
|
20" |
5.0 |
8,712 |
|
22" |
5.5 |
7,920 |
|
30" |
7.5 |
5,808 |
|
*Use 3 foot measurement (yardstick). |
||
1. Select an average area of the soybean field for sampling.
2. Determine row width or row spacings!
3. Count number of plants in 3 ft. of row. (Make 3 counts and average)
4. Avg. Number plants/3 ft. row x **Multiplier = Plants/A
for respective row spacing
Note: If row width cannot be determined then count number of plants in one
yd?
Number of plants/yd2 x 4,840 = plants/A.
Pods/plant Determination-
1. Don�t count pods on two most uppermost nodes.
2. Count number of pods on five consecutive plants in a row and calculate the
avg. number of pods per plant.
3. Do the pod counts at 3 separate sites in the field and then average.
(Count in same area where plant population was determined!)
Soybean Yield Formula =
Plants/A x Avg. Number pods/plant x 2.3 ) 3000 )60 = Bu/A
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