ECOLOGY AND CONTROL OF EASTERN REDCEDAR (JUNIPERUS VIRGINIANA L.)
TL;DRAbstract
Eastern redcedar (Juniperus virginiana L.) is the most widespread tree east of the Rocky Mountains. In the past several decades, the species has spread across many areas of the midwest that were formerly pure grassland. Attention has been focused on this spread, since the tree's presence reduces forage production. The purpose of this dissertation was to investigate the control of eastern redcedar with herbicides, and to study several ecological relationships between the tree species and it associated understory herbaceous vegetation. Six studies were conducted: (1) Compare the ability of three herbicides (hexazinone, picloram, and tebuthiuron) to control eastern redcedar. (2) Determine the allelopathic influence of eastern redcedar foliage and duff extracts on native grass germination and growth. (3) Quantify the reduction in forage production caused by the tree's presence. (4) Quantify the tree's influence on soil water content and on understory light levels. (5) Compare the impact of
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Eastern redcedar (Juniperus virginiana L.) is the most widespread tree east of the Rocky Mountains. In the past several decades, the species has spread across many areas of the midwest that were formerly pure grassland. Attention has been focused on this spread, since the tree's presence reduces forage production. The purpose of this dissertation was to investigate the control of eastern redcedar with herbicides, and to study several ecological relationships between the tree species and it associated understory herbaceous vegetation. Six studies were conducted: (1) Compare the ability of three herbicides (hexazinone, picloram, and tebuthiuron) to control eastern redcedar. (2) Determine the allelopathic influence of eastern redcedar foliage and duff extracts on native grass germination and growth. (3) Quantify the reduction in forage production caused by the tree's presence. (4) Quantify the tree's influence on soil water content and on understory light levels. (5) Compare the impact of
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