Idaho Plant Materials Technical Note No. 24

TABLE 3
SEEDING RATE CALCULATIONS
Pounds per acre and seeds per row foot for various row spacing can be calculated.
Seeds per linear foot calculations can be determined using the following formula:
Lbs Seed/Acre x No. Seeds/lb X Row Spacing (inches) = Number of Seeds/Linear Foot
43,560 12 - Inches
All seeding rates in narratives and table 1 are for 12- inch row spacing.
For row spacing wider than 12- inches, calculate seeding rate using the following information in Table 3:
For row spacing narrower than 12- inches, calculate seeds per row foot using the following information in Table 3:
TABLE 3
Row Spacing (Inches) PLS Pounds / Acre Seeds / Row Foot
6 Same as 12- inch rows Multiply 12- inch seeds/foot by 0.50
7 Same as 12- inch rows Multiply 12- inch seeds/foot by 0.58
9 Same as 12- inch rows Multiply 12- inch seeds/foot by 0.75
10 Same as 12- inch rows Multiply 12- inch seeds/foot by 0.83
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14 Divide lbs/acre at 12– inch rows spacing by 1.17 Same as 12- inch rows
18 Divide lbs/acre at 12– inch rows spacing by 1.50 Same as 12- inch rows
20 Divide lbs/acre at 12– inch rows spacing by 1.67 Same as 12- inch rows
21 Divide lbs/acre at 12– inch rows spacing by 1.75 Same as 12- inch rows
24 Divide lbs/acre at 12– inch rows spacing by 2.00 Same as 12- inch rows
27 Divide lbs/acre at 12– inch rows spacing by 2.25 Same as 12- inch rows
28 Divide lbs/acre at 12– inch rows spacing by 2.33 Same as 12- inch rows
30 Divide lbs/acre at 12– inch rows spacing by 2.50 Same as 12- inch rows
35 Divide lbs/acre at 12– inch rows spacing by 2.91 Same as 12- inch rows
36 Divide lbs/acre at 12– inch rows spacing by 3.00 Same as 12- inch rows
40 Divide lbs/acre at 12– inch rows spacing by 3.33 Same as 12- inch rows
42 Divide lbs/acre at 12– inch rows spacing by 3.50 Same as 12- inch rows
48 Divide lbs/acre at 12– inch rows spacing by 4.00 Same as 12- inch rows
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