The shallower seed emerged two weeks later than the deeper seed and yielded 1.6 bushels per acre less. The units mounted to the center frame of the planter placed the seed at 1.5 inches deep and into moisture while the units mounted to the outer wings planted the seed 1 inch deep and into dry or marginal moisture conditions. I visited a field where a planter had failed to place the seed at the correct depth. Taking time to check planting depth is important regardless of the planting equipment used. This procedure is discussed in more detail in the Michigan State University Extension article, “ Reconfiguring planting units on no-till drills to improve soybean planting performance.” A cheap and effective option is to reconfigure the planting units on drills or air seeders set up on 7.5-inch rows so that none of the gauge wheels run over the old corn row. However, depth control on drills and air seeders equipped with gauge wheels mounted on single disk openers can be greatly improved. Planters typically provide better depth control than drills or air seeders. However, the larger cotyledons on large seed are more difficult to pull through a soil crust, so plant large seed shallower when planting into soils prone to crusting. This is true when large seed is planted in coarse-textured soils. Large seed contains more stored energy and should be able to emerge from greater depths than small seed. If you must plant deeper than 1.5 inches in order to place the seed into uniform moisture, make sure the variety has an excellent emergence score or long hypocotyl.Īlso, consider seed size when deciding how deep to plant. This may require planting deeper than 1.5 inches under dry soil conditions. This is why agronomists recommend planting soybeans into at least 0.5 inch of moist soil. The seed must imbibe (take-in) 50 percent of its weight in moisture in order for the germination process to begin and remain above 20 percent after the seed swells and the seed coat splits. ![]() Soybean seed can be planted up to 2 inches deep in sandy soils.Īdequate soil moisture is the most important factor affecting soybean germination. Planting at the deeper end of the range is recommended under the following conditions: As a general rule, plant at the shallower end of the range under the following conditions: ![]() Under most conditions, soybeans should be planted between 1 and 1.5 inches deep. An even bigger concern is that in 68 percent of the fields, the seed was planted too deep, a condition known to delay emergence. Planting depth surveys revealed that only 20 percent of the fields planted with drills were planted at or near the intended depth. Most of the trench is 16" wide, except for the normal peripheral damage on much of it.ġ" - 2" is all you need to grow grass.Soybean seed is very sensitive to planting depth, so producers need to be careful and get their crop off to a good start. I have started the project and used 4"-6" so far, but think I am over doing it a bit. What depth should the topsoil be over my water trench? Our restoration crews that sub-contract the repair of gas and electric trenches are required to use 4". OK, here is a question for you landscape experts. The South Shore of Lake Ontario, New York
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