How Do You Estimate Soybean Yield?

Soybean yield estimates are most accurate within three weeks of maturity, but are  still only estimates. This information has been collected from “Soybean Production Field Guide” from NDSU Extension Service.

  • Determine the number of feet of row needed to make 1/1000 of an acre. See table below.
  • Count the number of plants in 10 different randomly selected sample areas. Calculate the average.

Avg. =  __________= A (plants/acre)

  • Count the number of pods on ten 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 3000 seeds /pound.

D ÷ 3000 =  ________ = E (lbs/acre)

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

E ÷60 =  ___________ = Yield (bu/acre)

 

Row Width Length of Single Row equal to 1/1000 of an acre
6 87’1”
7 74’8”
8 65’4”
10 52’3”
15 34’10”
20 26’2”
28 18’8”
30 17’5”
32 16’4”
36 14’6”

 

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