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on Soybean

Seed Burial and Persistence of Palmer
amaranth and Waterhemp

USB Grant-Funded Webcast

May 2019

By Jason K. Norsworthy, Ph.D.
Elms Farming Chair of Weed Science
University of Arkansas
Fayetteville, Arkansas
Phone: 479-575-8740


Executive Summary
(5 min 31 sec)

Full Presentation
(22 min 50 sec)


for PC, Mac, and
Mobile Devices
(5.16 MB)

for PC, Mac, and
Mobile Devices
(16.6 MB)


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Summary: Information regarding the impact of tillage methods on seed burial depth and persistence of Palmer amaranth and waterhemp allows growers to make informed decisions on how best to manage these weeds. In this video, seed production potential of these weeds is discussed along with depth of seed burial and the likelihood for these weeds to emerge from a one-time deep tillage or continuous no-tillage production systems. Persistence of both weeds in the soil seedbank is compared when lying on the soil surface or buried to a 6-inch depth over a three-year period for northern and southern U.S. geographies where soybean is typically grown. Management strategies using tillage along with the need for preventing escapes are examined with recommendations based on current level of infestation in fields.

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