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Determining yield Potential by Assessing ear at or near Dent Stage

The following procedures can be provided to evaluate potential yield in This assessment is finest done in ~ or near dent phase so the you can identify the kernels in ~ the tip of the cob that will certainly fill and reach maturity.

Step 1: recognize the number of plants in 1/1000th of one acre

Mark turn off a ar of row representing 1/1000th of one acre. Table 1 reflects the heat length compelled to do this at various row spacing. Count the variety of plants with productive ears in this area.

Step 2: determine the number of kernels on each ear.

Select ear from five consecutive plants at five different locations in the field. Because that each ear, counting the number of rows around the ear (Figure 1). Pick one or 2 rows of kernels and count the number of kernels indigenous the base to the guideline of the ear. Perform not counting the very first kernels at the base of the ear or very little kernels at the ear tip. Multiply the variety of rows on the ear by the kernels per row to identify kernel number every ear. Average the kernel number every ear across all twenty-five ears selected native the field.

Figure 1. Ear cross section mirroring counts that rows about the ear.


Figure 2. ear v kernels count on the row.


Step 3: recognize productivity potential

Use the complying with equation to recognize yield in bushels every acre:

(Plants per 1/1000th of one acre X average number of kernels per ear) / 90

The denominator (90) to represent the average number of dry kernels in a bushel that and also takes into account the fact that you have measured 1/1000th of one acre. If the kernels room bigger than typical then you could take into consideration dividing through 85 or if the kernels are smaller sized than common you can divide by 105.

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In the ear examples above the equation (based top top a plant population of 33,000 plants per acre) is:

(33 X 20 X 28) / 90 = 205.3 BUSHELS per ACRE!!

Table 1. Row length needed to measure up 1/1000th of one acre for determining plant populations at different row spacing.

Row Spacing (Inches)Length because that Determining1/1000th of one acre(fee)

Written By

Dr. Ron HeinigerProfessor and Extension Specialist, / Soybeans / little GrainsCall Dr. Ron email Dr. Ron crop & soil NC State Extension, NC State University