Interference of Common Cocklebur (Xanthium Strumarium L.) and Velvetleaf (Abutilon Theophrasti Medic.) With Soybean Stands at Different Densities and Planting Patterns

Reduced stands of soybean and weed infestation is a common problem in soybean growing areas. The object of this study was to study the interference of common cocklebur (Xanthium strumarium L.) and velvetleaf (Abutilon theophrasti Medic.) with soybean stands of different densities and planting patterns. Field experiments were conducted during 1986 and 1987 at Urbana, Illinois. A randomized complete block design with 3 x 7 split-plot arrangements, having four replications was used. Weed treatments assigned to the main plots were: weed-free; common cocklebur; and velvetleaf. And seven subplots were soybean stands: control (26.22 plants/m row), and three levels of reduction, 20%, 40% and 60%, respectively, of the full stand, each arranged in two patterns: even and gapped. Weeds were planted in a diamond pattern at an interval of 1.5 m in the soybean rows at the time of soybean planting.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Agronomy

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Marwat, Khan Bahadar

Contributors dc:contributor

• Nafziger, Emerson D.

• Agriculture, Agronomy
• Biology, Botany
• Biology, Ecology

Identifier

(UMI)AAI8908771

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/71657