CONSERVATION SYSTEMS RESEARCH FOR IMPROVING ENVIRONMENTAL QUALITY AND PRODUCER PROFITABILITY
Location: National Soil Dynamics Laboratory
Title: Weed Seedbank Composition in a Long-Term Tillage and Landscape Variability Study
Submitted to: Southern Conservation Tillage Systems Conference
Publication Type: Abstract Only
Publication Acceptance Date: June 25, 2007
Publication Date: June 25, 2007
Citation: Price, A.J., Arriaga, F.J., Balkcom, K.S., Raper, R.L., Reeves, D.W., Shaw, J.N. 2007. Weed Seedbank Composition in a Long-Term Tillage and Landscape Variability Study. Southern Conservation Tillage Systems Conference. CD-ROM.
Weed composition has been shown to be influenced by numerous environmental and cropping system attributes. The objective of this study was to evaluate cropping and landscape effects on weed seedbank composition. Soil samples at two depths were collected in fall 2006 from an established experiment located on a 24-acre Coastal Plain field at the E.V. Smith Research and Extension Center near Shorter, AL. The experimental design was a factorial arrangement of two tillage systems (conventional and non-inversion subsoiling), with and without manure, a corn-cotton rotation with both phases of the rotation present each year, with six replications imposed on 20-ft by 787-ft long strips across the field. Each strip in the field was divided into 20-ft by 60-ft cells. Soil samples were placed in plastic trays and kept moist for three months. Weed seedling were identified and removed over time. The six major weeds (totaling 19,087 individual seedlings) included annual bluegrass (739), carpetweed (539), common chickweed (851), henbit (15,376), purple cudweed (398), and smallflowered bittercress (587). Sample depth, tillage, manure, and the manure by tillage interaction significantly influenced weed composition and density.