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Tennessee Valley Study for Resilient Economic Agricultural Practices in Auburn, Alabama

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posted on 2024-02-13, 13:57 authored by Kipling Balkcom

Tennessee Valley Study for Resilient Economic Agricultural Practices in Auburn, Alabama Maize ( Zea mays L.) produced in narrow rows can increase yields and accelerate canopy closure. Costly equipment modifications make narrow rows impractical, but a twin-row configuration may boost pro­ duction with fewer equipment modifications. Four field experiments were conducted to measure weed biomass, leaf area index (LAI), and yield for a conventional (CN) and a glyphosate-resistant (GR) hybrid across three plant densities (low 4.0–4.4 plants m - 2 ; medium 5.9–6.4 plants m - 2 ; and high 7.9–8.4 plants m - 2 ) and two row configurations (single vs. twin) in a conservation tillage system during the 2005 grow­ ing season. The experimental design was a split–split plot with a RCB arrangement of whole plots where hybrids were assigned to main plots, row configurations to subplots, and plant density to sub-subplots with four replications. Row configuration had little effect on weed biomass compared to plant density and hybrid. Leaf area index increased with higher plant density at all locations. In general, LAI increased with the twin-row configuration, but LAI also varied with hybrid based on interactions between hybrid and plant density or row configuration. Row configuration had little impact on maize yields, while plant density had the most effect on yields. Plant density also interacted with hybrid or row configuration at multiple locations, although maize yields did not always increase with higher plant density. Conventional hybrids may also provide an alternative to GR hybrids, particularly at lower plant densities. Maize yield increases with twin rows were minimal and may not justify twin row conversion under dryland condi­ tions, but growers that already utilize twin-row equipment will not suffer yield decreases by planting twin rows.

Resources in this dataset:

  • Resource Title: Auburn, AL Tennessee Valley Study (ALAUTVS) CSV data.

    File Name:

    Resource Description: CSV format data on Experimental Units, Field Sites, Residue Management, Persons, Treatments, Weather Daily, Weather Station.




Data contact name

Balkcom, Kipling

Data contact email


Ag Data Commons

Use limitations

Citation requested if data is used.

Temporal Extent Start Date


Temporal Extent End Date



  • irregular


  • Not specified

Geographic Coverage


ISO Topic Category

  • environment
  • farming

National Agricultural Library Thesaurus terms

Alabama; corn; Zea mays; canopy; equipment; field experimentation; weeds; biomass; leaf area index; glyphosate; glyphosate resistance; plant density; conservation tillage; experimental design; hybrids; crop yield; arid lands; growers; planting

OMB Bureau Code

  • 005:18 - Agricultural Research Service

OMB Program Code

  • 005:040 - National Research

ARS National Program Number

  • 211
  • 212

Pending citation

  • No

Public Access Level

  • Public

Preferred dataset citation

Balkcom, Kipling (2020). Tennessee Valley Study for Resilient Economic Agricultural Practices in Auburn, Alabama. Ag Data Commons.

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