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Hydroponics is a type of horticulture and a subset of hydroculture which involves growing plants, usually crops or medicinal plants, without soil, by using water-based mineral nutrient solutions. Terrestrial or aquatic plants may grow with their roots exposed to the nutritious liquid or the roots may be mechanically supported by an inert medium such as perlite, gravel, or other substrates.
Sustainable agriculture is farming in sustainable ways meeting society's present food and textile needs, without compromising the ability for current or future generations to meet their needs. It can be based on an understanding of ecosystem services. There are many methods to increase the sustainability of agriculture. When developing agriculture within sustainable food systems, it is important to develop flexible business process and farming practices. Agriculture has an enormous environmental footprint, playing a significant role in causing climate change, water scarcity, water pollution, land degradation, deforestation and other processes; it is simultaneously causing environmental changes and being impacted by these changes. Sustainable agriculture consists of environment friendly methods of farming that allow the production of crops or livestock without damage to human or natural systems. It involves preventing adverse effects to soil, water, biodiversity, surrounding or downstream resources—as well as to those working or living on the farm or in neighboring areas. Elements of sustainable agriculture can include permaculture, agroforestry, mixed farming, multiple cropping, and crop rotation.
Sustainable living describes a lifestyle that attempts to reduce the use of Earth's natural resources by an individual or society. Its practitioners often attempt to reduce their ecological footprint by altering their home designs and methods of transportation, energy consumption and diet. Its proponents aim to conduct their lives in ways that are consistent with sustainability, naturally balanced, and respectful of humanity's symbiotic relationship with the Earth's natural ecology. The practice and general philosophy of ecological living closely follows the overall principles of sustainable development.
Biodynamic agriculture is a form of alternative agriculture based on pseudo-scientific and esoteric concepts initially developed in 1924 by Rudolf Steiner (1861–1925). It was the first of the organic farming movements. It treats soil fertility, plant growth, and livestock care as ecologically interrelated tasks, emphasizing spiritual and mystical perspectives.
Urban agriculture refers to various practices of cultivating, processing, and distributing food in urban areas. The term also applies to the area activities of animal husbandry, aquaculture, beekeeping, and horticulture in an urban context. Urban agriculture is distinguished from peri-urban agriculture, which takes place in rural areas at the edge of suburbs.
Aquaponics is a food production system that couples aquaculture with hydroponics whereby the nutrient-rich aquaculture water is fed to hydroponically grown plants.
Aeroponics is the process of cultivating plants in an air or mist environment, eliminating the need for soil or an aggregate medium. The term "aeroponic" originates from the Greek words aer ("air") and ponos ("work"). It falls under the category of hydroponics, as water is employed in aeroponics to deliver nutrients to the plants.
Vertical farming is the practice of growing crops in vertically stacked layers. It often incorporates controlled-environment agriculture, which aims to optimize plant growth, and soilless farming techniques such as hydroponics, aquaponics, and aeroponics. Some common choices of structures to house vertical farming systems include buildings, shipping containers, tunnels, and abandoned mine shafts. As of 2020, there is the equivalent of about 30 ha of operational vertical farmland in the world.
Controlled-environment agriculture (CEA) -- which includes indoor agriculture (IA) and vertical farming—is a technology-based approach toward food production. The aim of CEA is to provide protection from the outdoor elements and maintain optimal growing conditions throughout the development of the crop. Production takes place within an enclosed growing structure such as a greenhouse or plant factory.
The environmental impact of agriculture is the effect that different farming practices have on the ecosystems around them, and how those effects can be traced back to those practices. The environmental impact of agriculture varies widely based on practices employed by farmers and by the scale of practice. Farming communities that try to reduce environmental impacts through modifying their practices will adopt sustainable agriculture practices. The negative impact of agriculture is an old issue that remains a concern even as experts design innovative means to reduce destruction and enhance eco-efficiency. Though some pastoralism is environmentally positive, modern animal agriculture practices tend to be more environmentally destructive than agricultural practices focused on fruits, vegetables and other biomass. The emissions of ammonia from cattle waste continue to raise concerns over environmental pollution.
Building-integrated agriculture (BIA) is the practice of locating high-performance hydroponic greenhouse farming systems on and in mixed-use buildings to exploit synergies between the built environment and agriculture.
Space farming refers to the cultivation of crops for food and other materials in space or on off-Earth celestial objects – equivalent to agriculture on Moon.
The growth of plants in outer space has elicited much scientific interest. In the late 20th and early 21st century, plants were often taken into space in low Earth orbit to be grown in a weightless but pressurized controlled environment, sometimes called space gardens. In the context of human spaceflight, they can be consumed as food and/or provide a refreshing atmosphere. Plants can metabolize carbon dioxide in the air to produce valuable oxygen, and can help control cabin humidity. Growing plants in space may provide a psychological benefit to human spaceflight crews. Usually the plants were part of studies or technical development to further develop space gardens or conduct science experiments. To date plants taken into space have had mostly scientific interest, with only limited contributions to the functionality of the spacecraft, however the Apollo Moon tree project was more or less forestry inspired mission and the trees are part of a country's bicentennial celebration.
Lufa Farms is an urban agricultural company located in the Ville Saint-Laurent neighborhood of Montreal, Quebec. The company states its mission is to grow food where people live and grow it more sustainably. The company, founded in 2009, has installed commercial greenhouses on the rooftops of several large industrial buildings in the greater Montreal area.
Edward "Ed" Harwood was an American inventor, entrepreneur, and one of the pioneers of aeroponics. He was the founder of Aero Farm Systems, L.L.C. (AeroFarms), as well as the chief inventor of “Method and apparatus for aeroponic farming".
Agrivoltaics,agrophotovoltaics,agrisolar, or dual-use solar is the simultaneous use of areas of land for both solar panels and agriculture. Because solar panels and crops must share the sunlight, the design of agrivoltaic facilities may require trading off such objectives as optimizing crop yield, crop quality, and energy production. In some cases crop yield increases due to the shade of the solar panels mitigating some of the stress on plants caused by high temperatures and UV damage.
Eu:CROPIS was a life science satellite developed by the German Aerospace Center (DLR) and intended to investigate the possibility of growing plants in different levels of gravity, such as that of the Moon and Mars, as a sustainable food source using human urine for moisture and as the source of fixed nitrogen.
Sustainable urban agriculture is an emerging field that involves the practice of growing fruits, vegetables, and other food crops within city limits, using methods that are environmentally friendly and socially responsible. The concept of SUA is rooted in the belief that cities can and should produce a significant portion of their own food to reduce dependence on industrial agriculture and its associated negative environmental impacts, such as pesticide use, water pollution, and fossil fuel consumption.
Urban agriculture is the practice of cultivating, processing, and distributing food in or around urban areas. It is the growing of fresh produce within the city for individual, communal, or commercial purposes in cities in both developed and developing countries.
References
- ↑ "Aerofarms urban agriculture system - less space, less water and no pesticides". New Atlas. June 11, 2010.
- ↑ "Underground lighting".[ dead link ]
- ↑ "Deep underground, Paris mushroom growers struggle to preserve heritage". France24. 18 November 2021. Retrieved 27 May 2023.
- ↑ Staff, Space com (October 19, 2010). "Lunar Greenhouse Could Grow Food For Future Moon Colonies". Space.com.
- ↑ Kijk magazine, editie 13, 2010
- ↑ "Reuse of urine and exhaled air".[ dead link ]
- ↑ "GreenForges digs deep to farm underground". TechCrunch. Retrieved 2022-04-23.
- ↑ "New startup takes vertical farming underground — literally". Freethink. Retrieved 2022-04-23.
- ↑ "Earthlight Documentary | Is learning to live on the moon the key to sustainability on earth?". cals.arizona.edu.