ID

3006-1447

Authors as Published

David Holshouser, Extension Agronomist

Desired Plant Population
Row
Width
Full‐
Season
Double‐Crop
Barley
Double‐
Crop Wheat
 80K100K120K140K160K180K200K220K
 (Seed per foot assuming 80% emergence)
366.58.19.7---------------
305.46.88.1---------------
244.35.46.5---------------
203.64.55.46.37.28.19.09.9
183.24.14.95.76.57.38.18.9
152.73.44.14.75.46.16.87.4
7.51.41.72.02.42.73.03.43.7

Seeding Rate = Desired plant population density ÷ (43,560 sq. ft./acre ÷ row width in feet) ÷ % emergence

Example: = 100,000 ÷ (43,560 ÷ (15 ÷ 12)) ÷ 0.80
                =100,000 ÷ 34,848 ÷ 0.80
                = 2.7 seeds per foot of row (15-inch row spacing)

As planting is delayed, increase seeding rates
Use lower seeding rates on more productive soils.

 

Converting Desired Soybean Plant Population Density to Pounds of Seed per Acre
Desired Plant Population Density per Acre (x1,000)
Seed/lb80100120140160180200220240260
 (Pounds of seed per acre (assuming 80% emergence)
1600637894109125141156172188203
180056698397111125139153167181
200050637588100113125138150163
22004657688091102114125136148
2400425263738394104115125135
260039485867778796106115125
28003645546371808998107116
30003342505867758392100108
3200313947556370788694102
340029374452596674818895
360028354249566369768390
380026334046535966727986
400025313844505663697581
420024303642485460667177
440023283440465157636974

Virginia Cooperative Extension materials are available for public use, reprint, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University.

Issued in furtherance of Cooperative Extension work, Virginia Polytechnic Institute and State University, Virginia State University, and the U.S. Department of Agriculture cooperating. Edwin J. Jones, Director, Virginia Cooperative Extension, Virginia Tech, Blacksburg; M. Ray McKinnie, Administrator, 1890 Extension Program, Virginia State University, Petersburg.

Publication Date

June 11, 2010