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An agroecosystem is a conceptual model of an agricultural system, relating its functions to its inputs and outputs.
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∙ 9y ago
An agroecosystem is a dynamic system that includes agricultural crops, livestock, soil, water, and the interactions among them. It aims to maximize resource use efficiency, biodiversity, and sustainability while minimizing negative environmental impacts. Agroecosystems often involve diverse cropping systems, integrated pest management, and conservation practices.
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What is a example for agiculture?
The agroecosystem can be viewed as a subset of the conventional ecosystem. Agroecosystem deals with the human activity of agriculture. Example a farm has an impact on the species assemblages and energy flows as well as the net nutrient balance.
What has the author Rex Victor Cruz written?
Rex Victor Cruz has written: 'Agroecosystem analysis of Makiling Forest Reserve, Philippines' -- subject(s): Forest reserves, Agroforestry, Agricultural ecology
What has the author Susan Reidel written?
Susan Reidel has written: 'Epizootiology of a microsporidia (Microspora:Microsporea) infection of bean leaf beetles, Cerotoma trifurcata (Forster) (Coleoptera:Chrysomelidae) in a soybean agroecosystem' -- subject(s): Diseases, Bean leaf beetle
What has the author Stephen R Gliessman written?
Stephen R. Gliessman has written: 'Field and laboratory investigations in agroecology' -- subject(s): Agricultural ecology, Field work, Laboratory manuals 'Agroecosystem Sustainability' -- subject(s): Sustainable agriculture, Agricultural ecology
Natural ecosystem vs agroecosystem?
natural ecosystem must not be ineterfered by man, destruction of natural ecosystems leads to a change in the natural conditions of that ecosystem, whereas the agroecosystems are manipulated by man.
What has the author Gordon Conway written?
Gordon Conway has written: 'Pest of cocoa in Sabah and their control' -- subject(s): Control, Cacao, Pests, Diseases and pests 'The doubly green revolution' -- subject(s): Agriculture, Food supply, Environmental aspects of Agriculture, Economic aspects of Agriculture, Green Revolution, Agricultural innovations 'Agroecosystem analysis for research and development' -- subject(s): Agricultural ecology, Agriculture, Economic aspects, Economic aspects of Agriculture 'Theoretical Ecology' 'Islamophobia' 'After the green revolution' -- subject(s): Sustainable agriculture 'After the green revolution' -- subject(s): Sustainable agriculture
What has the author June Prill-Brett written?
June Prill-Brett has written books such as "Death's Door: Poetry Inspired by the Tarot" and "Firefly Prayers: Poetry of the Heart." Her works often explore themes of spirituality, nature, and introspection.
What is the disadvantages of modern agriculture?
Evidence indicates, however, that excessive reliance on monoculture farming and agroindustrial inputs, such as capital-intensive technology, pesticides, andchemical fertilizers, has negatively impacted the environment and rural society. Most agriculturalists had assumed that the agroecosystem/natural ecosystem dichotomy need not lead to undesirable consequences, yet, unfortunately, a number of "ecological diseases" have been associated with the intensification of food production. They may be grouped into two categories: diseases of the ecotope, which include erosion, loss of soil fertility, depletion of nutrient reserves, salinization and alkalinization, pollution of water systems, loss of fertile croplands to urban development, and diseases of the biocoenosis, which include loss of crop, wild plant, and animal genetic resources, elimination of natural enemies, pest resurgence and genetic resistance to pesticides, chemical contamination, and destruction of natural control mechanisms.Chemical fertilizerscan also become air pollutants, and have recently been implicated in the destruction of the ozone layer and in global warming. Their excessive use has also been linked to the acidification/salinization of soils and to a higher incidence of insect pests and diseases through mediation of negative nutritional changes in crop plants . Use of fertilizers can alter the biology of rivers and lakes. Applied in either liquid or granular form, fertilizer can supply crops with readily available and uniform amounts of several essential plant nutrients. Fertilizers, on the other hand, have been praised as being highly associated with the temporary increase in food production observed in many countries. National average rates of nitrate applied to most arable lands fluctuate between 120-550 kg N/ha. But the bountiful harvests created at least in part through the use of chemical fertilizers, have associated, and often hidden, costs. A primary reason why chemical fertilizers pollute the environment is due to wasteful application and the fact that crops use them inefficiently. The fertilizer that is not recovered by the crop ends up in the environment, mostly in surface water or in ground water. Nitrate contamination of aquifers is widespread and in dangerously high levels in many rural regions of the world. Such nitrate levels are hazardous to human health and studies have linked nitrate uptake to methaemoglobinemia in children and to gastric, bladder and oesophageal cancers in adults.Pesticides can kill useful insects as well as those that destroy crops. The loss of yields due to pests in many crops. It is well known that cultivated plants grown in genetically homogenous monocultures do not possess the necessary ecological defense mechanisms to tolerate the impact of outbreaking pest populations. Modern agriculturists have selected crops for high yields and high palatability, making them more susceptible to pests by sacrificing natural resistance for productivity. On the other hand, modern agricultural practices negatively affect pest natural enemies, which in turn do not find the necessary environmental resources and opportunities in monocultures to effectively and biologically suppress pests.Use of chemicals on fields creates run-off, excess runs off into rivers and lakes causing pollution. Fertilizer nutrients that enter surface waters (rivers, lakes, bays, etc.) can promote eutrophication, characterized initially by a population explosion of photosynthetic algae. Algal blooms turn the water bright green, prevent light from penetrating beneath surface layers, and therefore killing plants living on the bottom. Such dead vegetation serve as food for other aquatic microorganisms which soon deplete water of its oxygen, inhibiting the decomposition of organic residues, which accumulate on the bottom. Eventually, such nutrient enrichment of freshwater ecosystems leads to the destruction of all animal life in the water systems.Per John Jeavons of growbionintensive.org, it kills or malnourishes the fungi and bacteria that hold the soil together, resulting in loss of topsoil, so the increase in yield is only temporary, and, like a heroin addiction, demands ever-greater inputs to sustain output, and eventually destroys the productive capacity of the land.
