Misplaced Pages

#498501

55-484: The Bicentennial Tower is an American observation tower that is located in Erie, Pennsylvania and features panoramic views of Lake Erie , Presque Isle State Park , and downtown Erie. The tower was built in 1995 to commemorate the city's bicentennial year, 1996, and is located at the end of State Street on Dobbins Landing . This historic structure is 187 feet (57 m) tall and has two observation decks. A portion of

110-509: A flag pole at its top. Some of these towers are permanently accessible, either free or with the payment of an admission fee. Others are accessible only at certain times, in most cases only with the payment of an admission fee. At these towers the platform is usually open, with some having a restaurant in the basement. There are also towers with a much more extensive use; for example. the observation tower on Rossberg mountains in Reutlingen contains

165-454: A highly efficient, simplified, precise, and low cost method of altering the genomes of species. Since 2013, CRISPR has been used to enhance a variety of species of grains, fruits, and vegetables. Crops are modified to increase their resistance to biotic and abiotic stressors such as parasites, disease, and drought as well as increase yield, nutrition, and flavour. Additionally, CRISPR has been used to edit undesirable traits, for example, reducing

220-451: A horticulturist may consider aspects based on the plants intended use and can include plant morphology, rarity, and utility. When selecting plants for the landscape, there are necessary observations of the location that must be made first. Considerations as to soil-type, temperature/climate, light, moisture, and pre-existing plants are made. These evaluations of the given environment are taken into consideration when selecting plant material for

275-460: A hotel within its structure. Although most of these towers were initially built before World War I , such structures are still being built, in particular as attractions at horticultural shows . Modern observation towers are in most cases no longer built of brick, but concrete, steel and wood are used as the preferred building materials. Permanent observation towers are also sometimes found in amusement parks , however in parks where each attraction

330-515: A lighthouse is usually between 10 and 50 metres high, and is almost always open air. Some sports facilities have high buildings with observation decks. This is often the case at ski jumps, as these have a tower and are usually unused in the summer. In addition, there are other sports facilities with observation decks, like the inclined tower of the Montreal Olympic stadium. Access to the platform of nearly all sports facilities with observation deck

385-402: A restaurant. The height of these platforms, which can be glassed or open-air depending on the height of the building, where they are most common on the topmost floor. As a rule access usually requires the payment of an admission fee, is possible by elevator only at dedicated opening times. Also numerous water towers have, a usually open-air observation deck opened for public traffic, whose height

440-428: A rule an elevator is available in these buildings for the visitors of the observation deck, as the observation deck lies usually very highly (mostly within the range between 50 and 200 metres, at some towers also more highly). Many of these towers have also a tower restaurant, which can be designed as revolving restaurant. While tower restaurants for the protection of the restaurant guests from the wind are in closed rooms,

495-609: A rule, since these buildings are mostly not higher than 20 metres. Active watch towers are not as a rule accessible to the public, since they usually serve for the monitoring of sensitive ranges. However watch towers can be quite ordered for forest fire monitoring a platform accessible for the public or be used during times without forest fire risk as observation towers. Shut down watch towers can however be easily converted to observation towers. Also some radio towers were so built that they can be used apart from their function as transmitting tower also as observation tower. A condition for this

550-433: A t-antenna for medium wave and stands on insulators. However one notices at the first experimental transmissions that at the tower voltages would arise, which would have unpleasant consequences for visitors and so the tower was grounded by the elevator shaft. However this shifted direction of main beam of transmitter away from actual supply area, the city of Berlin. As before World War II nearly whole radio traffic took place in

605-464: A variety of methods. Covering plants with plastic in the form of cones - called hot caps, or tunnels, can help to manipulate the surrounding temperature. Mulching is also an effective method to protect outdoor plants from frost during the wintertime. Inside, other frost prevention methods include the use of wind machines, heaters, and sprinklers. Plants have evolved to require different amounts of light, and lengths of daytime; their growth and development

SECTION 10

#1732845422499

660-553: Is a charity in United Kingdom that leads on the encouragement and improvement of the science, art, and practice of horticulture in all its branches. The organization shares the knowledge of horticulture through its community, learning programs, and world-class gardens and shows. The Chartered Institute of Horticulture (CIH) is the Chartered professional body for horticulturists and horticultural scientists representing all sectors of

715-669: Is a sufficiently stable construction, which permits a permanent safe visitor entrance without interruption of the transmission services. This is the case for towers for radio services in the UHF/VHF-range the case, not however for most types of radio towers for long and medium wave, why a use of these structures as observation tower is impossible in most cases. That the use of a tower as radio tower for medium wave and observation tower not well fits, showed up in Radio Tower Berlin , which originally carried together with an 80 metres high mast

770-535: Is commonly associated with the more professional and technical aspects of plant cultivation on a smaller and more controlled scale than agronomy . There are various divisions of horticulture because plants are grown for a variety of purposes. These divisions include, but are not limited to: propagation , arboriculture , landscaping , floriculture and turf maintenance. For each of these, there are various professions, aspects, tools used and associated challenges; Each requiring highly specialized skills and knowledge of

825-457: Is determined by the amount of light/light intensity that they receive. Control of this may be achieved artificially through the use of fluorescent lights in an indoor setting. Manipulating the amount of light also controls flowering. Lengthening the day encourages the flowering of long-day plants and discourages the flowering of short-day plants. Water management methods involve employing irrigation/drainage systems, and controlling soil moisture to

880-644: Is extrapolated as evapotranspiration is increased, soils are degraded of their nutrients, and oxygen levels are depleted, resulting in up to a 70% loss in crop yield. Living organisms such as bacteria, viruses, fungi, parasites, insects, weeds and native plants are sources of biotics stresses and can deprive the host of its nutrients. Plants respond to these stresses using defence mechanisms such as morphological and structural barriers, chemical compounds, proteins, enzymes and hormones. The impact of biotic stresses can be prevented using practices such as incorporate tilling, spraying or Integrated Pest Management (IPM). Care

935-436: Is in contrast to the entrance of the church usually only possible under payment an admission fee at the opening times of the church. The height of the observation decks is usually in the range between 20 and 50 metres. The platform is nearly always open-air. Some lighthouses have an observation deck open to the public. Access is usually by stairs. An admission fee is often charged and hours may be limited. The observation deck of

990-486: Is mostly as the height of older observation towers in the height range between 10 and 50 metres. It can be reached depending upon tower by stairs or by an elevator. Some water towers have also a tower restaurant. Prospect platforms of water towers are nearly only accessible under payment during the opening times, which are different for each tower. Also some church towers possess observation decks. However elevators are only available in rare cases. The entrance of this platform

1045-723: Is no soil used. Growers within a greenhouse setting will often opt for a soilless mix which does not include any actual components of naturally occurring soil. These mixes offer advantages such as water absorption, sterility, and are generally very available within the industry. Soil management methods are broad, but includes the use of fertilizers, planned crop rotation to prevent the degradation of soils that are seen in monocultures, applying fertilizers, and soil analysis. Abiotic factors such as weather, light and temperature are all things that can be manipulated with enclosed environments such as cold frames, greenhouses , conservatories , poly houses and shade houses. Materials that are used in

1100-427: Is not separately paid for, panorama rides are preferred. Watch towers are observation towers, on which persons supervise a larger area. Strictly speaking, control towers also fall into this category, although surveillance from these structures is mostly done in a non-optical way using Radar . Watch towers usually have a closed pulpit to protect the observer against bad weather. Watch towers do not have an elevator as

1155-551: Is only possible during opening times after paying an admission fee. Depending upon the building the access can be done by an elevator and/or a stairway. The platforms can be vitreous or open. The height above ground lies usually between 10 and 50 metres. Fire lookout towers have been used widely in Australia, Canada, and the United States to hoist fire lookout persons to heights where they can identify and report new wildfires. In

SECTION 20

#1732845422499

1210-429: Is required to reduce damages and losses to horticultural crops during harvest. Compression forces occur during harvesting, and horticultural goods can be hit in a series of impacts during transport and packhouse operations. Different techniques are used to minimize mechanical injuries and wounding to plants such as: Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR/Cas9) has recently gained recognition as

1265-407: Is required to support a rapidly growing population with demands for its products. Due to global climate change, extremes in temperatures, strength of precipitation events, flood frequency, and drought length and frequency are increasing. Together with other abiotic stressors such salinity, heavy metal toxicity , UV damage, and air pollution, stressful environments are created for crop production. This

1320-877: The Henninger Turm , a grain silo with tower restaurant and observation deck in Frankfurt, the bell tower of Berlin Olympic stadium , whose platform is accessible by an elevator, the winding tower of the mining industry museum in Bochum, which has an open-air observation deck to which an elevator runs or a wind turbine in Holtriem wind park, which is equipped with a closed platform accessible over stairs. Also aerial tramway support towers, which serve as observation tower (and aerial tramway station), were realized, like Torre Jaume I in Barcelona. Even on

1375-617: The International Society for Horticultural Science and the American Society of Horticultural Science . In the United Kingdom, there are two main horticulture societies. The Ancient Society of York Florists is the oldest horticultural society in the world and was founded in 1768; this organization continues to host four horticultural shows annually in York , England. Additionally, The Royal Horticultural Society , established in 1804,

1430-498: The UHF / VHF range ( FM sound broadcasting , TV, public rural broadcasting service, and portable radio service). In some cases this usage of the tower is at least as important as its use as an observation tower. Such towers are usually called TV towers or telecommunication towers. Many towers are also equipped with a tower restaurant and allow visitors access via elevators. Also common is the usage of water towers as observation towers. As in

1485-428: The domestication of plants around 10,000-20,000 years ago. At first, only plants for sustenance were grown and maintained, but eventually as humanity became increasingly sedentary, plants were grown for their ornamental value. Horticulture emerged as a distinct field from agriculture when humans sought to cultivate plants for pleasure on a smaller scale rather than for mere sustenance. Emerging technologies are moving

1540-595: The Gods, as well as were given in ceremonies to leaders to demonstrate their connection to the Gods. Plant propagation in horticulture is the process in which the multiplication of a species is performed, increasing the number of individual plants. Propagation involves both sexual and asexual methods. In sexual propagation seeds are used, while asexual propagation involves the division of plants, separation of tubers, corms, and bulbs - by use of techniques such as cutting, layering, grafting. When selecting plants to cultivate,

1595-821: The Middle Ages. Early practices in horticulture include a number of various ways that people managed the land (using an assortment of tools), with a variety of methods and types of plants cultivated for a number of uses. Methods, tools and plants grown, have always depended on the culture and climate. There are a number of traditional horticultural practices that we know of today: such as the Indigenous peoples of pre-colonized North America using biochar to enhance soil productivity by smoldering plant waste - European settlers called this soil Terra Preta de Indio . In North America, Indigenous people grew maize, squash, and sunflower - among other crops. Mesoamerican cultures focused on

1650-797: The New Zealand Horticulture Institute is another known horticultural organization. In India, the Horticultural Society of India (now Indian Academy of Horticultural Sciences) is the oldest society which was established in 1941 at Lyallpur, Punjab (now in Pakistan) but was later shifted to Delhi in 1949. The other notable organization in operation since 2005 is the Society for Promotion of Horticulture based at Bengaluru. Both these societies publish scholarly journals – Indian Journal of Horticulture and Journal of Horticultural Sciences for

1705-417: The United States, there once were over 5,000 fire lookout towers. Areas where birdlife congregates are often associated with bird observation towers to assist with viewing. Hyperboloid structures have a hyperboloid shape that is usually lattice framework and an observation deck on top. There are also some very different observation towers, which don't fit into other categories. Examples for this are

Bicentennial Tower - Misplaced Pages Continue

1760-675: The advancement of horticultural sciences. Horticulture in the Indian state of Kerala is spearheaded by Kerala State Horticulture Mission . The National Junior Horticultural Association (NJHA) was established in 1934 and was the first organization in the world dedicated solely to youth and horticulture. NJHA programs are designed to help young people obtain a basic understanding of horticulture and develop skills in this ever-expanding art and science. The Global Horticulture Initiative (GlobalHort) fosters partnerships and collective action among different stakeholders in horticulture. This organization has

1815-676: The area around the tower was decorated with bricks engraved with the names and messages of individuals and groups that donated money in support of various community-benefit projects, including the tower's construction. On November 11, 1996, a time capsule to be opened in 2095 was buried at the base of the tower. Observation tower Observation towers that are used as guard posts or observation posts over an extended period to overlook an area are commonly called watchtowers instead. Similar instances of observation towers are recognised as crow's nests , observatories , viewing platforms , etc. Observation towers are an easily visible sight on

1870-473: The browning and production of toxic and bitter substances of potatoes. CRISPR has also been employed to solve issues of low pollination rates and low fruit yield common in greenhouses. As compared to Genetically Modified Organisms (GMO), CRISPR does not add any alien DNA to the plant's genes. There are various organizations worldwide that focus on promoting and encouraging research and education in all branches of horticultural science; such organizations include

1925-674: The case of TV towers the visitor will usually reach the observation deck by elevator, which is usually at a lower height above ground The typical height of the observation deck of water towers is 20 metres up to 50 metres, while the typical height of the platform of TV towers is from 80 metres up to 200 metres. Finally, some church towers may have observation decks, albeit often without an elevator. Many other buildings may have towers which allow for observation. In particular prior to World War I rambler associations, and some municipalities, built observation towers on numerous summits. Usually these towers were built of stone, however sometimes wood or iron

1980-407: The construction of these buildings are chosen based on the climate, purpose and budget. Cold frames provide an enclosed environment, they are built close to the ground and with a top made of glass or plastic. The glass or plastic allows sunlight into the frame during the day and prevents heat loss that would have been lost as long-wave radiation at night. This allows plants to start to be grown before

2035-465: The countryside, as they must rise over trees and other obstacles to ensure clear vision. Older control rooms have often been likened to medieval chambers. The heavy use of stone, iron, and wood in their construction helps to create this illusion. Modern towers frequently have observation decks or terraces with restaurants or on the roof of mountain stations of an aerial ropeway. Frequently observation towers are used also as location of radio services within

2090-587: The cultivating of crops on a small scale, such as the milpa or maize field, around their dwellings or in specialized plots which were visited occasionally during migrations from one area to the next. In Central America, the Maya involved augmentation of the forest with useful trees such as papaya , avocado , cacao , ceiba and sapodilla . In the fields, multiple crops such as beans, squash, pumpkins and chili peppers were grown. The first horticulturists in many cultures, were mainly or exclusively women. In addition to

2145-679: The cultivation of plant material professionally. There are many different types of horticulturists with different job-titles, including: gardener , grower, farmer , arborist , floriculturist , landscaper , agronomist, designer, landscape architect, lawn-care specialist, nursery manager, botanical garden curator, horticulture therapist, and much more. They may be hired by a variety of companies/institutions including, but not limited to: botanical gardens, private/public gardens, parks, cemeteries, greenhouses, golf courses, vineyards, estates, landscaping companies, nurseries, educational institutions, etc. They may also be self-employed. Horticulture began with

2200-434: The desire existed to provide these towers with a tower restaurant and an observation deck, in order to make the building of towers more economical via admission fees and increased notability. Several water towers were also built with this in mind, but many have not survived to the modern day. Horticulture Horticulture is the science and art of growing fruits, vegetables, flowers, or ornamental plants. Horticulture

2255-458: The domestication of plants 10,000-20,000 years ago, and has since, been deeply integrated into humanity's history. The domestication of plants occurred independently within various civilizations across the globe. The history of horticulture overlaps with the history of agriculture and history of botany , as all three originated with the domestication of various plants for food. In Europe, agriculture and horticulture diverged at some point during

Bicentennial Tower - Misplaced Pages Continue

2310-533: The elevator in the late 19th century made taller observation decks possible. Most notably, the Eiffel Tower and the Blackpool Tower were built in this era. Radio towers developed as combined sending and observation tower between 1924 and 1926 in the city of Berlin . After World War II , a great need for tall observation towers arose, due to their dual usage as television and radio transmitters. In large cities,

2365-494: The growing season starts. Greenhouses/conservatories are similar in function, but are larger in construction and heated with an external energy source. They can be built out of glass, although they are now primarily made from plastic sheets. More expensive and modern greenhouses can include temperature control through shade and light control or air-conditioning as well as automatic watering. Shade houses provide shading to limit water loss by evapotranspiration. Commercial horticulture

2420-442: The horticultural industry across Great Britain, Ireland and overseas.  It is the only horticultural professional body where its top professionals can achieve Chartered status and become a Chartered Horticulturist. The Australian Institute of Horticulture and Australian Society of Horticultural Science was established in 1990 as a professional society to promote and enhance Australian horticultural science and industry. Finally,

2475-549: The horticulturist. Typically, horticulture is characterized as the ornamental, small-scale/non-industrial cultivation of plants; horticulture is distinct from gardening by its emphasis on scientific methods, plant breeding, and technical cultivation practices, while gardening, even at a professional level, tends to focus more on the aesthetic care and maintenance of plants in gardens or landscapes. However, there are aspects of horticulture that are industrialized/commercial such as greenhouse production or CEA. Horticulture began with

2530-415: The industry forward, especially in the way of altering plants to be more adverse to parasites, disease and drought. Modifying technologies such as Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR/Cas9), are also improving the nutrition, taste and yield of crops. There are many horticultural organizations and societies found around the world, that are formed by horticulturists and those within

2585-811: The industry. These include the Royal Horticultural Society , the International Society for Horticultural Science , and the American Society of Horticultural Science . There are divisions and sub-divisions within horticulture, this is because plants are grown for many different reasons. Some of the divisions in horticulture include: It includes the cultivation of all plants including, but not limited to: ornamental trees/shrubs/plants , fruits , vegetables , flowers , turf , nuts , seeds , herbs and other medicinal/edible plants. This cultivation may occur in garden spaces, nurseries , greenhouses , vineyards , orchards , parks , recreation areas, etc. Horticulturists, are those who study and practice

2640-775: The location. Plant selection may be for annual displays, or they may be for more permanent plantings. Characteristics of the plant such as mature height/size, colour, growth habit, ornamental value, flowering time and invasive potential are what finalizes the plant selection process. Environmental factors that effect plant development include: temperature, light, water, pH, nutrient availability, weather events (rain, snow, sleet, hail and freezing rain, dew, wind and frost) humidity, elevation, terrain, and micro-climate effects. In horticulture, these environmental variables may be avoided, controlled or manipulated in an indoor growing environment. Plants require specific temperatures to grow and develop properly. Temperature control can be done through

2695-464: The long -, medium and shortwave range, first after World War II with introduction of radio services in UHF/VHF-range required towers only acting as antenna carriers, radio towers with observation decks built. For this the closed reinforced concrete construction way was nearly always used. Radio towers with observation decks often serve for TV transmission or for radio relay link services and are called therefore usually TV tower or telecommunication tower. As

2750-648: The medicinal and nutritional values that plants hold, plants have also been grown for their beauty, and to impress and demonstrate power, knowledge, status and even wealth of those in-control of the cultivated plant material. This symbolic power that plants hold has existed even before the beginnings of their cultivation. There is evidence that various gardens maintained by the Aztecs were sacred, as they grew plants that held religious value. Plants were grown for their metaphorical relation to Gods and Goddesses. Flowers held symbolic power in religious rites, as they were offered to

2805-469: The needs of the species. Methods of irrigation include surface irrigation, sprinkler irrigation, sub-irrigation, and trickle irrigation. Volume of water, pressure, and frequency are changed to optimize the growing environment. On a small scale watering can be done manually. The choice of growing media and components to the media help support plant life. Within a greenhouse environment, growers may choose to grow their plants in an aquaponic system where there

SECTION 50

#1732845422499

2860-417: The prospect platform can be open or in a closed room. An open platform is more favourable for photographing, since no reflexes at the disk arise, while closed platforms are for many visitors more pleasant. Prospect outlooks on TV towers are opened only at certain times and their entrance is possible only under payment of an admission fee. Also numerous highrise buildings have observation decks , sometimes even

2915-505: The pylons of suspension bridges were already observation decks installed, as the example of Nový Most in Bratislava shows. A very unusual observation tower is Pont basculant de la Seyne-sur-Mer . It was once a bascule bridge, now permanently put upright and used as observation tower. In Germany, observation towers first appeared on the countryside at the end of the 18th century. These early towers were often built by wealthy aristocrats . It

2970-657: Was also used. At nearly all these towers access to the observation deck , usually at a height of between 5 and 40 metres, is only possible by way of stairs. Most of these towers are used only for tourism, however some of these towers might also be used, at times of high forest fire risk, as fire observation posts or in times of war as military observation posts with anti-aircraft positions placed beside it. Further uses were not intended at most of these buildings, although some of these towers today now carry antennas for police/fire engine radios, portable radio or low power FM- and TV-transmitters. Older observation towers frequently have

3025-510: Was not until the mid-19th century that citizens took control of the construction of such towers. In Austria and Switzerland many observation towers were established by alpine and tourist associations, and continue to be cared for by them. In the Waldigen Mountains , many citizen committees were active. Because of the long reign of emperor Franz Joseph , many observation decks carry the name "anniversary observation platform". The invention of

#498501