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Effects of Topsoil Thickness On Winter Annual Weed Biomass Production and Nutrient Flux

Published online by Cambridge University Press:  12 June 2017

David E. Pettry
Affiliation:
Dep. Agron., Miss. State Univ., Mississippi State, MS 39762
Richard E. Switzer
Affiliation:
Dep. Agron., Miss. State Univ., Mississippi State, MS 39762
A. Wayne Cole
Affiliation:
Dept. Plant Pathol. Weed Sci., Miss. State Univ., Mississippi State, MS 39762

Abstract

The effects of topsoil thickness on winter annual weed growth and nutrient concentration were assessed for three consecutive years in soybean plots. The topsoil treatments had high fertility levels, uniform textures, and no herbicides were used in the study. Common chickweed composed 75% of the winter annual weed species. Weed biomass production decreased as topsoil thickness decreased from 22.5 cm to 0. Topsoil thickness of 22.5 cm produced 800 kg ha–1 more weed growth than 0 cm topsoil. The weed biomass grown in thicker topsoil had higher total amounts of N, K, Mg, and Ca.

Type
Research
Copyright
Copyright © 1990 by the Weed Science Society of America 

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