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Svend O. Heiberg
Svend Oluf Heiberg (1900–1965) was a silviculturist, born in Copenhagen, Denmark, on July 22, 1900, educated at Yale University. He came to the United States in 1926, becoming a naturalized US citizen in 1934. Heiberg was Professor of Silviculture, and later Associate Dean for Graduate Studies, at the New York State College of Forestry at Syracuse University in Syracuse, New York. He and his wife, Aasa Gerlach, had two daughters, Lily and Karin, and one son, Eric. Heiberg died on February 5, 1965, in Syracuse. Early life and education Heiberg received master's degrees in forestry from both the Royal Veterinary and Agricultural University in Copenhagen, Denmark, and from Yale University. Originally, Heiberg "intended to enter the Danish Forestry Service in Denmark". From 1924 to 1925, Heiberg and his friend, Aksel Svane, later to become a lawyer and Governor of Greenland, ventured on an historic world-tour by motorcycle. Interested in studying "the forest reserves... o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copenhagen
Copenhagen ( or .; da, København ) is the capital and most populous city of Denmark, with a proper population of around 815.000 in the last quarter of 2022; and some 1.370,000 in the urban area; and the wider Copenhagen metropolitan area has 2,057,142 people. Copenhagen is on the islands of Zealand and Amager, separated from Malmö, Sweden, by the Øresund strait. The Øresund Bridge connects the two cities by rail and road. Originally a Viking fishing village established in the 10th century in the vicinity of what is now Gammel Strand, Copenhagen became the capital of Denmark in the early 15th century. Beginning in the 17th century, it consolidated its position as a regional centre of power with its institutions, defences, and armed forces. During the Renaissance the city served as the de facto capital of the Kalmar Union, being the seat of monarchy, governing the majority of the present day Nordic region in a personal union with Sweden and Norway ruled by the Danis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sri Lanka
Sri Lanka (, ; si, ශ්රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an island country in South Asia. It lies in the Indian Ocean, southwest of the Bay of Bengal, and southeast of the Arabian Sea; it is separated from the Indian subcontinent by the Gulf of Mannar and the Palk Strait. Sri Lanka shares a maritime border with India and Maldives. Sri Jayawardenepura Kotte is its legislative capital, and Colombo is its largest city and financial centre. Sri Lanka has a population of around 22 million (2020) and is a multinational state, home to diverse cultures, languages, and ethnicities. The Sinhalese are the majority of the nation's population. The Tamils, who are a large minority group, have also played an influential role in the island's history. Other long established groups include the Moors, the Burghers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecology (journal)
''Ecology'' is a scientific journal that publishes research and synthesizes papers in the field of ecology. It was founded in 1920 as the continuation of ''Plant World'', and is published by the Ecological Society of America. According to the ''Journal Citation Reports,'' it is currently ranked 15th out of 136 journals in the Ecology Ecology () is the study of the relationships between living organisms, including humans, and their physical environment. Ecology considers organisms at the individual, population, community, ecosystem, and biosphere level. Ecology overlaps wi ... category. References External links * Ecology journals English-language journals Publications established in 1920 {{ecology-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Humus
In classical soil science, humus is the dark organic matter in soil that is formed by the decomposition of plant and animal matter. It is a kind of soil organic matter. It is rich in nutrients and retains moisture in the soil. Humus is the Latin word for "earth" or "ground". In agriculture, "humus" sometimes also is used to describe mature or natural compost extracted from a woodland or other spontaneous source for use as a soil conditioner. It is also used to describe a topsoil horizon that contains organic matter (''humus type'', ''humus form'', or ''humus profile''). Humus has many nutrients that improve the health of soil, nitrogen being the most important. The ratio of carbon to nitrogen (C:N) of humus commonly ranges between eight and fifteen with the median being about twelve. It also significantly affects the bulk density of soil. Humus is amorphous and lacks the "cellular cake structure characteristic of plants, micro-organisms or animals". Description The primary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soil Science Society Of America
The Soil Science Society of America (SSSA), is the largest soil-specific society in the United States. It was formed in 1936 from the merger of the Soils Section of the American Society of Agronomy and the American Soil Survey Association. The Soils Section of ASA became the official Americas section of the International Union of Soil Sciences in 1934, a notable role which SSSA continues to fulfill. Mission The mission of the Society is: "1) to enhance the sustainability of soils, the environment, and society by integrating diverse scientific disciplines and principles in soil science for the wise stewardship of soil and natural resources, and 2) to advance the discovery, practice, and profession of soil science through excellence in the acquisition and application of knowledge to address challenges facing society, in the training and professional development of soil scientists, and in the education of, and communication to a diverse citizenry." Publications SSSA publishes peer-r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reforestation
Reforestation (occasionally, reafforestation) is the natural or intentional restocking of existing forests and woodlands (forestation) that have been depleted, usually through deforestation, but also after clearcutting. Management A debated issue in managed reforestation is whether or not the succeeding forest will have the same biodiversity as the original forest. If the forest is replaced with only one species of tree and all other vegetation is prevented from growing back, a monoculture forest similar to agricultural crops would be the result. However, most reforestation involves the planting of different selections of seedlings taken from the area, often of multiple species. Another important factor is the natural regeneration of a wide variety of plant and animal species that can occur on a clear cut. In some areas the suppression of forest fires for hundreds of years has resulted in large single aged and single species forest stands. The logging of small clear cuts an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potassium Deficiency (plants)
Potassium deficiency, also known as potash deficiency, is a plant disorder that is most common on light, sandy soils, because potassium ions (K+) are highly soluble and will easily leach from soils without colloids.Datnoff, L.E. et al. ''Mineral Nutrition and Plant Disease''. The American Phytopathological Society, 2007 Potassium deficiency is also common in chalky or peaty soils with a low clay content. It is also found on heavy clays with a soil structure, poor structure. Role of potassium in plants The main role of potassium is to provide the ionic environment for metabolic processes in the cytosol, and as such functions as a regulator of various processes including growth regulation. Plants require potassium ions (K+) for protein synthesis and for the opening and closing of stomata, which is regulated by proton pumps to make surrounding guard cells either Turgor pressure, turgid or flaccid. A deficiency of potassium ions can impair a plant's ability to maintain these proce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unasylva
''Unasylva'' is a multilingual international journal of forestry and forest industries published by the Food and Agriculture Organization of the United Nations (FAO). Produced in separate English, French, and Spanish editions, ''Unasylva'' covers all aspects of forestry: policy and planning; conservation and management of forest-based plants and animals; rural socio-economic development, including food security; species improvement; industrial development; international trade; and environmental considerations, including the role of forests and trees in maintaining a sustainable base for agricultural production as well as the effects of environmental change on forestry. ''Unasylva'' presents news about forest science and policy to a broad range of readers – policymakers, forest managers, technicians, researchers, students, teachers. Indexing ''Unasylva'' is indexed by the ''Abstract Bulletin of the Institute of Paper Chemistry'', the ''Bibliography of Agriculture'', and ''Pred ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York Forest Owners Association
New is an adjective referring to something recently made, discovered, or created. New or NEW may refer to: Music * New, singer of K-pop group The Boyz Albums and EPs * ''New'' (album), by Paul McCartney, 2013 * ''New'' (EP), by Regurgitator, 1995 Songs * "New" (Daya song), 2017 * "New" (Paul McCartney song), 2013 * "New" (No Doubt song), 1999 *"new", by Loona from '' Yves'', 2017 *"The New", by Interpol from '' Turn On the Bright Lights'', 2002 Acronyms * Net economic welfare, a proposed macroeconomic indicator * Net explosive weight, also known as net explosive quantity * Network of enlightened Women, a conservative university women's organization * Next Entertainment World, a South Korean film distribution company Identification codes * Nepal Bhasa language ISO 639 language code * New Century Financial Corporation (NYSE stock abbreviation) * Northeast Wrestling, a professional wrestling promotion in the northeastern United States Transport * New Orleans Lakefron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WGY (AM)
WGY (810 kHz "NewsRadio WGY") is a commercial AM radio station licensed to Schenectady, New York, and serving the Capital District including the Albany-Schenectady-Troy radio market. It is owned by iHeartMedia, and it airs a News/Talk radio format. Programming is simulcast on WGY-FM 103.1 MHz. WGY is one of the first stations in the United States and the oldest to operate continuously in New York State, having launched on February 20, 1922. WGY is a Class A clear channel station powered at 50,000 watts using a non-directional antenna. It transmits from a single tower located off Mariaville Road, near the New York State Thruway, in the Town of Rotterdam. The station's daytime AM signal provides at least grade B coverage from the outer northern suburbs of New York City to the fringes of the North Country, as well as parts of Connecticut, Massachusetts and Vermont. At night, WGY can be heard across much of the eastern half of North America with a good radio. WGY (AM) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthworms
An earthworm is a terrestrial invertebrate that belongs to the phylum Annelida. They exhibit a tube-within-a-tube body plan; they are externally segmented with corresponding internal segmentation; and they usually have setae on all segments. They occur worldwide where soil, water, and temperature allow. Earthworms are commonly found in soil, eating a wide variety of organic matter. This organic matter includes plant matter, living protozoa, rotifers, nematodes, bacteria, fungi, and other microorganisms. An earthworm's digestive system runs the length of its body. An earthworm respires (breathes) through its skin. It has a double transport system made of coelomic fluid that moves within the fluid-filled coelom and a simple, closed circulatory system. It has a central and peripheral nervous system. Its central nervous system consists of two ganglia above the mouth, one on either side, connected to a nerve running along its length to motor neurons and sensory cells in each se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soil Science
Soil science is the study of soil as a natural resource on the surface of the Earth including soil formation, classification and mapping; physical, chemical, biological, and fertility properties of soils; and these properties in relation to the use and management of soils.Jackson, J. A. (1997). Glossary of Geology (4. ed.). Alexandria, Virginia: American Geological Institute. p 604. Sometimes terms which refer to branches of soil science, such as pedology (formation, chemistry, morphology, and classification of soil) and edaphology (how soils interact with living things, especially plants), are used as if synonymous with soil science. The diversity of names associated with this discipline is related to the various associations concerned. Indeed, engineers, agronomists, chemists, geologists, physical geographers, ecologists, biologists, microbiologists, silviculturists, sanitarians, archaeologists, and specialists in regional planning, all contribute to further knowledge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
