Despite the relative lack of information integrating the health, ecological, and economic impacts of different fish dietary choices, clear and simple guidance is needed to effect...
HorticultureLast Updated on 2014-09-08 22:22:03
Horticulture [L. hortus: garden +cult(us): till] is the cultivation of flowers, fruit, vegetables, or ornamental plants; the science and art of cultivating such plants. In addition to plant cultivation, other elements of horticulture include floral arranging, landscape design, and landscape installation, as well as landscape architecture, landscape management, interiorscaping, golf course management and urban forestry. Botanical gardens and arboreta provide public access to display gardens, and often support research programs as well. Horticultural therapy is the use of horticulture in therapeutical situations, such as in assisted living centers or for disadvantaged children' s programs.
Greenhouse usage ranks high among plant production systems in terms of technological usage. A large majority of greenhouse crops are grown in containers using modified... More »
SustainabilityLast Updated on 2014-06-28 09:40:31
Despite its popularity, the term sustainability is used in a wide variety of ways with a plethora of meanings. At the 1992 United Nations-sponsored Earth Summit in Rio de Janeiro, sustainable development was discussed in the context of a 1987 report entitled Our Common Future, which defined sustainable development as "development that meets the needs of the present without compromising the ability of future generations to meet their own needs." However, challenges remain in understanding how this definition could be helpful in evaluating policy choices or business decisions, since avoiding impeding the "ability of future generations to meet their own needs" requires predicting both their needs and their abilities. More recently, industrial ecology has been referred to as the "science of sustainability", although industrial ecology itself is... More »
Grand firLast Updated on 2014-06-26 16:53:15
This Plant Guide on the Grand fir, Abies grandis (Douglas ex D. Don) Lindl., was prepared and contributed by Guy Nesom of the Biota of North America Program at the North Carolina Botanical Garden (University of North Carolina, Chapel Hill, North Carolina) and Lincoln Moore of the U.S. Department of Agriculture's Natural Resources Conservation Service, National Plant Data Center.
Alternate common names
Lowland white fir, balsam fir, western balsam fir, yellow fir, California great fir, Oregon white fir, Puget Sound fir, giant fir, grand fir, silver fir, tall silver fir, great silver fir, stinking fir.
The soft wood of grand fir is a valued source of pulpwood and is harvested as timber even though it is weaker and more prone to decay than many other species. It is also used as plywood and has been used for various kinds of rough construction, such as framing,... More »
Organic farmingLast Updated on 2014-05-01 17:45:47Organic farming is a form of agriculture that relies on crop rotation, green manure, compost, biological pest control, and mechanical cultivation to maintain soil productivity and control pests, excluding or strictly limiting the use of synthetic fertilizers and synthetic pesticides, herbicides, plant growth regulators, livestock feed additives, and genetically modified organisms. Arguably, the term can be interpreted to include animal husbandry practices. Also, often there is confusion as to use of the term organic farming, especially since many food processors choose to use the term organic to induce consumers to purchase a food brand, even though all the standards of organic farming may not have been met.
Organic agricultural methods are regulated internationally and enforced legally by many nations, based in large part on the standards set by the International Federation of Organic... More »
Douglas-fir Last Updated on 2013-12-15 23:37:47The Douglas-fir (scientific name: Pseudotsuga) is a genus of tree that includes ar least five species found in North America and Asia:
Bigcone Douglas-fir (Pseudotsuga macrocarpa)
Coast Douglas-fir (Pseudotsuga menziesii)
-- Pseudotsuga menziesii subsp. menziesii – regular Coast Douglas-fir
-- Pseudotsuga menziesii subsp. glauca – Rocky Mountain Douglas-fir
Mexican Douglas-fir (Pseudotsuga lindleyana; included by some within Pseudotsuga menziesii subsp. glauca)
Chinese Douglas-fir (Pseudotsuga sinensis)
-- Pseudotsuga sinensis var. sinensis – regular Chinese... More »
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