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Estimating Soybean Yields

Soybean yield estimates are most accurate within three weeks of maturity but are still only estimates. Assume 2.3 beans per pod.

• Determine the number of feet of row needed to make 1/1,000 of an acre (table below).

• In the determined area, count the number of plants in 10 different randomly selected sample areas.

Calculate the average.

Avg. = ______________ = A (plants/acre)

• Count the number of pods per plant on 10 randomly selected sample areas. Calculate the average.

Avg. = ______________ = B (pods/plant)

• Calculate pods/acre by multiplying plant population by pods/plant.

A X B = ______________ = C (pods/acre)

• Calculate seeds/acre by multiplying pods per acre by an estimate of 2.3 seeds/pod.

2.3 X C = ______________ = D (seeds/acre)

• Calculate pounds/acre by dividing seeds/acre by an estimate of 3,000 seeds/pound.

D ÷ 3,000 = ______________= E (lbs/acre)

• Estimate yield by dividing pounds/acre by 60 pounds/bu.

E ÷ 60 = ______________ = yield (bushels/acre)


Row length equal to 1/1,000th acre
Row WidthLength of a single row equal to 1/1000 of an acre
(inches)
6 87'1"
7 74'8"
8 65'4"
10 52'3"
15 34'10"
18 29'
20 26'2"
22 23'9"
24 21'9"
28 18'8"
30 17'5"
32 16'4"
36 14'6"
38 13'9"
40

13'1"

Source: Soybean Production Field Guide for ND and Northwestern MN (A-1172), H. Kandel, 2014
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