The purpose of this study was to evaluate how soybean product, planting date, and irrigation strategy interact to help farmers maximize soybean yield potential and return on investments.
|Location||Gothenburg, NE||Planting Date||4/29/19, 5/13/19, 6/04/19, 6/24/19|
|Soil Type||Hord Silt Loam||Harvest Date||10/08/19, 10/08/19, 10/08/19, 10/14/19
|Previous Crop||Corn||Potential Yield
|Tillage Type||Strip Tillage||Seeding Rate
The study was set up as a randomized split-split plot design with irrigation strategy as the whole plot, planting date as the sub plot, and soybean product as the sub-sub plot. Treatment combinations were replicated four times.
Initially, there were four irrigation strategies. However, because of the timely rainfall throughout the growing season (27 inches from May 1 to September 1), irrigation was limited. A 0.8-inch difference between the four irrigation strategies resulted in no irrigation impact; therefore, the data was summarized across the treatments.
Eight Roundup Ready 2 Xtend® soybean products with maturity groups (MG) of 2.4 to 3.3 were compared.
The soybean products were planted at 180,000 seeds/acre on four different dates with a row spacing of 30 inches and irrigated using variable rate sprinkler irrigation.
Weeds were controlled uniformly across the study and no fungicides or insecticides were used to control other pests.
Soybean test weights (Table 2) were impacted more by soybean product with planting date having some affect.
Soybean products responded to planting date with some products recording their highest yield with the earliest planting date (April 29) while others had their highest yield with the second planting date (May 13). All products had their lowest yield with the last planting date (June 24).
Farmers should work with their local seed salesman or agronomist to help determine which soybean product(s) are best suited to help maximize yield potential and return on investment for their farming operation.