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Bernard Kratky
The Kratky method is a passive hydroponic technique for growing plants suspended above a reservoir of nutrient-rich water. Because it is a non-circulating technique, no additional inputs of water or nutrients are needed after the original application, and no electricity, pumps, or water and oxygen circulation systems are required. The Kratky method has applications both for commercial food production and as a small-scale and low-maintenance technique for home growers. It has been described as "the simplest hydroponic system." Description Plants are placed in net cups filled with an inert growth medium such as rock wool, expanded clay aggregate, sphagnum moss, or coconut coir. The net cups are suspended above a reservoir of water containing essential nutrients in solution. Only the root tips are allowed to touch the surface of the reservoir. As the plant grows and depletes the water level, a gap of moist air will form and expand between the water surface and the base of the pl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Passive Hydroponics
Passive hydroponics, semi-hydroponics or passive subirrigation is a method of growing plants without soil, peat moss, or bark. Methods Instead an inert porous medium transports water and fertilizer to the roots by capillary action. Water and fertilizer are held in a reservoir and conducted to the roots as necessary, reducing labor and providing a constant supply of water to the roots. In the simplest method, the pot sits in a shallow solution of fertilizer and water or on a capillary mat saturated with nutrient solution. Since routine maintenance is much simplified, passive hydroponics can reduce the labor required to maintain a large collection of plants. Semi-Hydroponics Semi-Hydroponics (Semi-Hydro or S/H) was the first passive hydroponic technique utilized for orchids, originating in the early 1990's, using Lightweight Expanded Clay Aggregate (LECA) as a medium in sold-bottomed containers, into which one or two, small-diameter holes were placed in the sidewall, setting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Net Pot
Net or net may refer to: Mathematics and physics * Net (mathematics), a filter-like topological generalization of a sequence * Net, a linear system of divisors of dimension 2 * Net (polyhedron), an arrangement of polygons that can be folded up to form a polyhedron * An incidence structure consisting of points and parallel classes of lines * Operator algebras in Local quantum field theory Others * Net (command), an operating system command * Net (device), a grid-like device or object such as that used in fishing or sports, commonly made from woven fibers * ''Net'' (film), 2021 Indian thriller drama film * Net (textile), a textile in which the warp and weft yarns are looped or knotted at their intersections * Net (economics) (nett), the sum or difference of two or more economic variables ** Net income (nett), an entity's income minus cost of goods sold, expenses and taxes for an accounting period * In electronic design, a connection in a netlist * In computing, the Internet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mineral Wool
Mineral wool is any fibrous material formed by spinning or drawing molten mineral or rock materials such as slag and ceramics. Applications of mineral wool include thermal insulation (as both structural insulation and pipe insulation), filtration, soundproofing, and hydroponic growth medium. Naming Mineral wool is also known as ''mineral fiber'', ''mineral cotton'', ''mineral fibre'', ''man-made mineral fibre'' (MMMF), and ''man-made vitreous fiber'' (MMVF). Specific mineral wool products are ''stone wool'' and ''slag wool''. Europe also includes glass wool which, together with ceramic fiber, are entirely artificial fibers that can be made into different shapes and are spiky to touch. History Slag wool was first made in 1840 in Wales by Edward Parry, "but no effort appears to have been made to confine the wool after production; consequently it floated about the works with the slightest breeze, and became so injurious to the men that the process had to be abandoned". ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Expanded Clay Aggregate
Lightweight expanded clay aggregate (LECA) or expanded clay (exclay) is a lightweight aggregate made by heating clay to around in a rotary kiln. The yielding gases expand the clay by thousands of small bubbles forming during heating producing a honeycomb structure. LECA has an approximately round or potato shape due to circular movement in the kiln and is available in different sizes and densities. LECA is used to make lightweight concrete products and other uses. History LECA was developed about 1917 in Kansas City, Missouri, to the production in a rotary kiln of a patented expanded aggregate known as Haydite which was used in the construction of SS Selma, an ocean-going ship launched in 1919. Following in the USA was the development of a series of aggregates known as Gravelite, Perlite, Rocklite, etc. In Europe, LECA commenced in Denmark, Germany, Netherlands, and UK. Characteristics LECA is usually produced in different sizes and densities from up to , commonly 0–4& ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphagnum
''Sphagnum'' is a genus of approximately 380 accepted species of mosses, commonly known as sphagnum moss, peat moss, also bog moss and quacker moss (although that term is also sometimes used for peat). Accumulations of ''Sphagnum'' can store water, since both living and dead plants can hold large quantities of water inside their cells; plants may hold 16 to 26 times as much water as their dry weight, depending on the species.Bold, H. C. 1967. Morphology of Plants. second ed. Harper and Row, New York. p. 225-229. The empty cells help retain water in drier conditions. As sphagnum moss grows, it can slowly spread into drier conditions, forming larger mires, both raised bogs and blanket bogs. Thus, sphagnum can influence the composition of such habitats, with some describing sphagnum as 'habitat manipulators'. These peat accumulations then provide habitat for a wide array of peatland plants, including sedges and Calcifuges, ericaceous shrubs, as well as orchids and carnivorous plant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coir
Coir (), also called coconut fibre, is a natural fibre extracted from the outer husk of coconut and used in products such as floor mats, doormats, brushes, and mattresses. Coir is the fibrous material found between the hard, internal shell and the outer coat of a coconut. Other uses of brown coir (made from ripe coconut) are in upholstery padding, sacking and horticulture. White coir, harvested from unripe coconuts, is used for making finer brushes, string, rope and fishing nets. It has the advantage of not sinking, so can be used in long lengths in deep water without the added weight dragging down boats and buoys. Coir must not be confused with coir pith, which is the powdery and spongy material resulting from the processing of the coir fibre. Coir fibre is locally named 'coprah' in some countries, adding to confusion. Pith is chemically similar to coir, but contains much shorter fibers. The name coco peat may refer either to coir or the pith or a mixture, as both have go ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kratky
Kratky, Krátký (; feminine form Krátká ) or Krátky (; feminine form Krátka ) is a Czech (Krátký/Krátká) and Slovak (Krátky/Krátka) surname. It is derived either from the Czech word ''krátký'' or the Slovak word ''krátky'' for "short" and is also to be found in the Czech and Slovak diaspora. People * Alena Krátká (born 1946), Czechoslovak politician * Andreas Kratky, German media artist * Bernard Kratky, American horticulturist * Břetislav Krátký (1911–1987), Czech sprinter * Christoph Kratky (born 1946), Austrian chemist * Fred Kratky (born 1942), American politician * Josef Kratky (1907–1989), Austrian politician * Marek Krátký (born 1993), Czech football player * Michele Kratky (born 1957), American politician * Otto Kratky (1902–1995), Austrian physicist * Paul Kratka (born 1955), American actor * Petr Krátký Petr Krátký (born 31 July 1943) is a Czech rower. He competed in the men's double sculls event at the 1968 Summer Olympics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Hawaii
A university () is an institution of higher (or tertiary) education and research which awards academic degrees in several academic disciplines. Universities typically offer both undergraduate and postgraduate programs. In the United States, the designation is reserved for colleges that have a graduate school. The word ''university'' is derived from the Latin ''universitas magistrorum et scholarium'', which roughly means "community of teachers and scholars". The first universities were created in Europe by Catholic Church monks. The University of Bologna (''Università di Bologna''), founded in 1088, is the first university in the sense of: *Being a high degree-awarding institute. *Having independence from the ecclesiastic schools, although conducted by both clergy and non-clergy. *Using the word ''universitas'' (which was coined at its foundation). *Issuing secular and non-secular degrees: grammar, rhetoric, logic, theology, canon law, notarial law.Hunt Janin: "The university ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Society For Horticultural Science
The International Society for Horticultural Science (ISHS) is the world's leading independent organization of horticultural scientists. Its aim is "to promote and encourage research and education in all branches of horticultural science and to facilitate cooperation and knowledge transfer on a global scale through its symposia and congresses (International Horticultural Congress), publications and scientific structure." Membership is open to all interested researchers, educators, students and horticultural industry professionals. The society dates from 1864, and was formally constituted in 1959. It is based in Leuven, Belgium, and is a founding member of the Global Horticultural Initiative. In 2008, it has over 7,000 members from about 150 countries. The ISHS coordinates the distributed network of International Cultivar Registration Authorities, which are responsible for ensuring that the names of plant cultivars and cultivar groups are defined and not duplicated. Publication ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mason Jar
A Mason jar, also known as a canning jar or fruit jar, is a glass jar used in home canning to preserve food. It was named after American tinsmith John Landis Mason, who patented it in 1858. The jar's mouth has a screw thread on its outer perimeter to accept a metal ring or "band". The band, when screwed down, presses a separate stamped steel disc-shaped lid against the jar's rim. Mason lost his patent for the jars and numerous other companies started manufacturing similar jars. Over the years, the brand name ''Mason'' became the genericized trademark for that style of glass home canning jar, and the word "Mason" can be seen on many Ball and Kerr brand jars. The style of jar is occasionally referred to by common brand names such as Ball jar (in the eastern US) or Kerr jar (in the western US) even if the individual jar isn't that brand. In early 20th century America, Mason jars became useful to those who lived in areas with short growing seasons. The jars became an essential part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deep Water Culture
Deep water culture (DWC) is a hydroponic method of plant production by means of suspending the plant roots in a solution of nutrient-rich, oxygenated water. Also known as deep flow technique (DFT), floating raft technology (FRT), or raceway, this method uses a rectangular tank less than one foot deep filled with a nutrient-rich solution with plants floating in Styrofoam boards on top. This method of floating the boards on the nutrient solution creates a near friction-less conveyor belt of floating rafts. DWC, along with nutrient film technique (NFT), and aggregate culture, is considered to be one of the most common hydroponic systems used today. Typically, DWC is used to grow short-term, non-fruiting crops such as leafy greens and herbs. The large volume of water helps mitigate rapid changes in temperature, pH, electrical conductivity (EC), and nutrient solution composition. Hobby methods Deep water culture has also been used by hobby growers. Net pots, plastic pots with netting to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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