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Effect of Tillage on Common Waterhemp (Amaranthus rudis) Emergence and Vertical Distribution of Seed in the Soil

Published online by Cambridge University Press:  20 January 2017

D. E. Refsell  and
R. G. Hartzler
D. E. Refsell*
Affiliation:
Department of Crop Sciences, University of Illinois, Urbana, IL 61801
R. G. Hartzler
Affiliation:
Department of Agronomy, Iowa State University, Ames, IA 50011
*
Corresponding author's E-mail: drefsell@illinois.edu.
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Abstract

Field studies were conducted in 2001 and 2002 to determine the effect of tillage on the emergence of common waterhemp from the soil seedbank. Emergence of common waterhemp was three times greater in no-till than chisel-till cultivation. Tillage did not affect the initial time of emergence; however, the time to 50% emergence was longer in no-till than chisel till. Duration of emergence did not differ among tillage systems. Common waterhemp seed was concentrated near the soil surface in no-till plots, whereas seed in the chisel-till plots were primarily found between 9 and 15 cm. The delayed and increased emergence in no-till cultivation may contribute to the greater problems in managing common waterhemp in no-till plots compared with plots where tillage is used.

Keywords

Common waterhemp, Amaranthus rudis Sauer AMATADelayed emergencetillageseedbankAMATA
Type
Weed Biology and Competition
Information
Weed Technology , Volume 23 , Issue 1 , March 2009 , pp. 129 - 133
Copyright
Copyright © Weed Science Society of America 

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