Trial Type
Seeding Rate/ Varieties/ Row Spacing
General Stats
Soil Stats
Methodology
Materials and Methods
In 2014 research was conducted at the SDSU Southeast experimental farm (Beresford), Volga, and Aberdeen. Treatments included two soybean varieties, one variety adapted to narrow rows and white mold resistance and the other, adapted to wide rows and susceptible to white mold. The varieties were Beresford: 2306R2 (resistant) and 2408R2 (susceptible) ; Volga: 2108R2 (resistant) and 2207R2 (susceptible); Aberdeen: 0906R2 (resistant) and 1108R2 (susceptible). At each location the soybean varieties were planted at two row spacings (8 and 30-inch), and four seeding rates (100K, 135K, 170K, and 205K). The experiments were planted on 30 May, 28 May, and 9 June at Volga, Southeast Farm, and Aberdeen, respectively.
Results
Results
The effect of row spacing and seeding rate however, changed with location (Table 1). At Beresford the two row spacings gave similar yields ( 70.9 bu/ac for 8-inch vs 70.4 bu/ac for 30-inch) while at Aberdeen the 8-inch row spacing had greater yield than the 30-inch row spacing (62.3 vs 56.0 bu/ac) (Table 1). Soybean seed yield increased as plant population was increased at the two locations, Aberdeen and Beresford. Greatest yields were obtained at the population of 205K at both locations.
The results show that narrow rows (8-inch) yield the same or slightly greater than wide rows (30 inch). This was true at all locations. The yield advantage for narrow rows over wide rows ranged from 1 – 6 bu/acre depending on the location.
Modified From: 2015 Report “Row Spacing/Seeding Rate /Variety for Maximizing Yield” By Thandiwe Nleya SDSU Associate Professor
