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United States Department of Agriculture

Agricultural Research Service

Title: Timing of Seedling Emergence: Accessible Database for the Corn Belt

Authors
item Forcella, Frank
item Buhler, Douglas
item Anderson, Randal
item Kremer, Robert
item Alm, David - UNIVERSITY OF ILLINOIS
item Stoller, Edward
item Dekker, J - IOWA STATE UNIVERSITY
item Jurik, T - IOWA STATE UNIVERSITY
item Wilson, R - UNIVERISTY OF NEBRASKA
item Cardina, J - OHIO STATE UNIVERSITY

Submitted to: Weed Science Society of America Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: April 10, 1996
Publication Date: N/A

Technical Abstract: The NC-202 Regional Research Committee sponsored a regional research project to determine the timing of seedling emergence of important Corn Belt weeds. Cumulative seedling emergence (CE) of each of several weed species was monitored at weekly intervals during spring and summer in replicated permanent quadrants at Morris and Rosemount, MN (1990 to 1994), Akron, CO (1993-94), Columbia, MO (1993-94), Scottsbluff, NE (1993-94), Urbana, IL (1990-91) Wooster, OH (1994), Ames, IA (1990, 1993), and Kirksville, MO (1990). Daily air temperature, soil temperature (5 to 10 cm depth), and precipitation were recorded. These micrometeorological data were used to calculate cumulative growing degree days and daily soil water potential at 5 to 10 cm depth at each site. Distinct relationships between CE and simple micrometeorological data occurred for many species. For other species, more complex emergence models were necessary to predict the timing gof emergence. All data will be available to interested individuals through the NC-202 Home Page (World Wide Web) based at Iowa State University.

Last Modified: 10/25/2014
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