Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
- Publication
Articles 1 - 5 of 5
Full-Text Articles in Plant Sciences
Biology And Ecology Of Palmer Amaranth (Amaranthus Palmeri), Prashant Jha
Biology And Ecology Of Palmer Amaranth (Amaranthus Palmeri), Prashant Jha
All Dissertations
Palmer amaranth (Amaranthus palmeri S. Wats.) is a troublesome weed of crops in southeastern United States. This research highlights studies on the biology and ecology of Palmer amaranth. Following dispersal in fall, Palmer amaranth seeds require high mean temperatures of 25 to 40 C for germination, which is not likely to occur in South Carolina until the following spring. With dormancy reduction over winter, seeds can germinate at high temperatures (≥25 C) and thermal amplitudes of 15 C during late spring (May) in the presence of light. A majority (>90%) of the non-dormant population in the soil seedbank emerge …
Dwarfing Mechanisms Of Prunus Species As Interstems And Rootstocks On Peach [Prunus Persica (L.) Batsch] Tree Vegetative Growth And Physiology, Antonio Weibel
Dwarfing Mechanisms Of Prunus Species As Interstems And Rootstocks On Peach [Prunus Persica (L.) Batsch] Tree Vegetative Growth And Physiology, Antonio Weibel
All Dissertations
The use of small trees in orchard systems reduces manual labor (pruning, thinning and harvesting), and induces precocity, thus making high-density plantations economically advantageous, which has elicited an interest in size-controlling rootstocks. However, the mechanisms involved in the reduction of scion growth by the rootstock are not well understood. The main objective of this study was to gain a better understanding of the dwarfing mechanism induced by size-controlling peach rootstocks. The relationship among different rootstocks (dwarfing to invigorating range) as to stored carbohydrates, tree water status, and interstem and grafting height was evaluated on young and mature `Redhaven' and `Redtop' …
Impacts Of Root Invigoration And Its Individual Components On The Performance Of Red Maple (Acer Rubrum), Kelby Fite
Impacts Of Root Invigoration And Its Individual Components On The Performance Of Red Maple (Acer Rubrum), Kelby Fite
All Dissertations
The Root Invigoration process involves soil decompaction with an air tool, amendment with organic matter and prescription fertilizer, and mulching. In the current study, we measured soil chemical and physical properties, tree characteristics, and root system responses to this process and its individual components. Treatments included Root Invigoration (AFM), mulch only (M), fertilization only (F), Airspade® tillage only (A), and an untreated control (C). The experiment was conducted from 2005-2007 at four urban sites: Anderson, SC; Boston, MA; Myrtle Beach, SC and Pittsburgh, PA. Soil strength was initially reduced by Airspade®, mulch and AFM; however only AFM-treated soils sustained this …
Variable Approaches Investigating Light Quality And Quantity Impacts On Warm- And Cool-Season Turfgrasses, Christian Baldwin
Variable Approaches Investigating Light Quality And Quantity Impacts On Warm- And Cool-Season Turfgrasses, Christian Baldwin
All Dissertations
Bermudagrass (Cynodon ssp.) is the most popular warm-season turfgrass used in warm climatic regions of the world due its recuperative ability, high traffic tolerance, heat tolerance, and relative drought and salt tolerance. However, shade is a microenvironment in which bermudagrass performs poorly. Morphological limitations, such as reduced lateral stem growth and overall reduction of carbohydrate synthesis contribute to bermudagrass, a C4 plant, decline under shade. Therefore, primary objectives of this dissertation were to determine the genetic diversity of bermudagrasses grown in full-sunlight and shade, impacts of shade and cultural practices on bermudagrass spring transition, management recommendations to enhance bermudagrass …
Physiological Response And Nutrient Recovery Of Cool-Season Turfgrasses Under Various Environmental Stresses, William Sarvis
Physiological Response And Nutrient Recovery Of Cool-Season Turfgrasses Under Various Environmental Stresses, William Sarvis
All Theses
Potassium (K) is an essential plant nutrient commonly applied to increase creeping bentgrass tolerance to environmental stresses and maintain overall turfgrass stand health. Limited research defining the K requirement of creeping bentgrass under heat and drought stress exists. Furthermore, research investigating K, calcium (Ca), and magnesium (Mg) recovery under abiotic stress has been inconsistent. To build on previous research and investigate the differences between liquid and granular K fertilization, experiments were conducted to evaluate the performance of liquid and granular K carriers in conjunction with liquid calcium and magnesium on their ability to suppress summer bentgrass decline of creeping bentgrass …