Title page for ETD etd-05162011-215940


Type of Document Master's Thesis
Author Childress, Michael Blanton
Author's Email Address childrem@vt.edu
URN etd-05162011-215940
Title Evaluating an Advanced Intensive Management Strategy for Virginia Wheat
Degree Master of Science
Department Crop and Soil Environmental Sciences
Advisory Committee
Advisor Name Title
Thomason, Wade E. Committee Chair
Alley, Marcus M. Committee Member
Griffey, Carl A. Committee Member
Parrish, David J. Committee Member
Keywords
  • Winter wheat
  • Management
  • Nitrogen
  • Seeding rate
Date of Defense 2011-04-29
Availability unrestricted
Abstract
Current Virginia soft red winter wheat (Triticum aestivum L.) management strategies have been in place for over 20 years. A new advanced intensive management (AIM) system has been evaluated in order to improve Virginia wheat yields and attempt to bring state average wheat yields of 4288 kg ha-1 more closely in-line with the maximum yield achieved in the Virginia Tech Official Soft Red Winter Wheat Trials of 7400 kg ha-1. Increases in nitrogen (N) fertilizer application rates and splits, a chelated micronutrient blend, increased seeding rates, and a “no tolerance” pest control methodology were compared to current intensive management practices in this study. Additional fall N application and an increased seeding rate resulted in an increased number of tillers m-2 at growth stage (GS) 25 and biomass at GS 30. This increased number of tillers may lead to a greater amount of viable grain head production and increased wheat yields. Higher seeding and N application rate resulted in dramatically increased lodging in 2009 with resultant yield loss. Grain yield was significantly affected by management type in three of six instances. The number of heads m-2 was the yield component factor most influenced by factors tested in these studies.
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