Soybean Planting and Seeding Rate


Recent research shows that under good conditions, daily yield losses for soybeans are 0.3, 0.4, and 0.5 percent per day of planting delay for the first, second and third 10-day periods in May. Total yield loss potential mounts to roughly 15 percent by the end of the month.

A soybean seed takes up 50 percent of its weight in moisture to germinate. Planters typically provide better seed depth control than drills or air seeders.

Ideal seeding rates are specific to multiple factors, however, there are proven agronomic advantages to maintaining moderate to high seeding rates in fields.

Thicker seeding rates may enhance plant and pod height. This is especially beneficial on sandy soils or when beans are planted later.

Soybean seeding rate formula

Fields planted at higher seeding rates may provide buffer against replanting due to hail or other stand-reducing events. Higher seeding rates help promote quicker canopy closure which may be beneficial in high heat or drought-prone areas. The early canopy closure helps keep soil surfaces cooler and can help protect soil moisture. Closing that canopy quicker also improves weed management by slowing down or inhibiting weed emergence and early growth.

To calculate your seeding rate, start by deciding on a final stand target.