Consumer surveys indicate that the shape of a tree is the most important factor affecting Christmas tree selection, followed by needle retention, species, and price. Traditionally, Americans have preferred dense trees, whereas Europeans have preferred more natural, or "open" trees.
Open trees have more space to hang ornaments, holding up to two-thirds more decorations than heavily sheared trees, and tend to weigh less than dense trees, providing advantages for growers and consumers alike.
Researchers and Christmas tree growers are working to shape Fraser firs that satisfy public preferences. M. Elizabeth Rutledge, a graduate student in the Department of Forestry and Environmental Resources North Carolina State University, is the primary author of a recent study of shearing techniques on Fraser fir. Rutledge and her collaborators evaluated the use on Fraser fir of the Top-Stop Nipper (TSN) a four-bladed, hand-held tool used to reduce growth in Christmas trees. They found that the TSN, when combined with traditional knife shearing or growth regulator treatments, "might offer a method to produce dense trees with minimal shearing or to leave longer leaders to produce a more open "European-style" tree with a layered, natural appearance.
According to the study, published in the April 2008 issue of HortTechnology, use of the Top-Stop Nipper shows promise for tree growers, but "there is so much variation among trees that the effect of the TSN on long-term appearance, quality, and marketability of Fraser firs is yet unknown." One thing is certain: Americans can look forward to new and improved holiday decorating as researchers and growers listen to consumer preferences and create ways to produce picture-perfect Christmas trees.
Michael W. Neff | EurekAlert!
Innovative genetic tests for children with developmental disorders and epilepsy
11.07.2018 | Christian-Albrechts-Universität zu Kiel
Oxygen loss in the coastal Baltic Sea is “unprecedentedly severe”
05.07.2018 | European Geosciences Union
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.
Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
19.07.2018 | Materials Sciences
19.07.2018 | Earth Sciences
19.07.2018 | Life Sciences