228-10 Twin-Row Vs. Single-Row Soybean Production In the Mid South As Influenced by Planting Date and Seeding Rate.

Poster Number 839

See more from this Division: C03 Crop Ecology, Management & Quality
See more from this Session: Oilseed and Fiber Crop Ecology, Management and Quality
Tuesday, October 18, 2011
Henry Gonzalez Convention Center, Hall C
Share |

H. Arnold Bruns, USDA-ARS, Stoneville, MS
Comparisons of single-row vs. twin-row soybean (Glycine max (L.) Merr.) production on a Beulah fine sandy loam (coarse-loamy, mixed thermic Typic Dystrochrepts) and Sharkey clay (Vertic Haplaquept) were made in 2009 and 2010 at Stoneville, MS..  Seeding rates of 20, 30, 40, and 50 seed m-2 were planted on beds in 25cm twin-rows with 102cm centers or 102cm single-rows.  Planting dates were made in , mid-April, mid-May, representing the ESPS and a mid-June common to double-crop soybean after wheat (Triticum aestivum L.) .  Data included established plants at R4, nodes and pods plant-1, yield, seed weight, and seeds m-2.  Twin-rows yielded more than single-rows on both soils (3.8 Mg ha-1 vs. 3.6 Mg ha-1 on the sandy loam; 4.2 Mg ha-1 vs. 4.0 Mg ha-1 on the clay).  Yields in 2010 were less due to drought and heat stress. Delayed planting decreased yields.  Increasing seeding rates had no effect. Twin-rows on both soils had more plants m-2 than single-rows.  Differences in nodes plant-1 were noted but did not affect yield. Pods plant-1 did not differ between row configurations on either soil.  Seeding rates above 30 seeds m-2 are not economically beneficial.  Seed weights differed slightly. Twin-rows generally produced more seeds per m2 than single rows.  Delayed planting will result in decreased yields. The small yield increases combined with equipment costs makes it important to consider a twin-row planter’s usefulness in other crops before investing in it for soybean production.
See more from this Division: C03 Crop Ecology, Management & Quality
See more from this Session: Oilseed and Fiber Crop Ecology, Management and Quality