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| Registros recuperados: 68 | |
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| Stuut, Jan‐berend W.; De Deckker, Patrick; Saavedra‐pellitero, Mariem; Bassinot, Franck; Drury, Anna‐joy; Walczak, Maureen H.; Nagashima, Kana; Murayama, Masafumi. |
| New proxy records from deep‐sea sediment cores from the northwestern continental margin of Western Australian reveal a 5.3 million‐year (Ma) history of aridity and tropical‐monsoon activity in northwestern Australia. Following the warm and dry early Pliocene (~5.3 Ma), the northwestern Australian continent experienced a gradual increase in humidity peaking at about 3.8 Ma with higher than present‐day rainfall. Between 3.8 and about 2.8 Ma, climate became progressively more arid with more rainfall variability. Coinciding with the onset of the northern hemisphere glaciations and the intensification of the northern hemisphere monsoon, aridity continued to increase overall from 2.8 Ma until today, with greater variance in precipitation and an increased... |
| Tipo: Text |
Palavras-chave: Paleoclimate; Monsoon; Australia; Runoff; Pliocene; Quaternary. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00502/61384/65035.pdf |
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| Franklin, A.M.; Aga, D.S.; Cytryn, Eddie; Durso, L.M.; Mclain, J.E.; Pruden, Amy; Roberts, M.C.; Rothrock, Jr, M.J.; Snow, D.D.; Watson, J.E.; Dungan, R.S.. |
| The presence of antibiotic drug residues, antibiotic resistant bacteria, and antibiotic resistance genes in agroecosystems has become a significant area of research in recent years, and is a growing public health concern. While antibiotics are utilized for human medicine and agricultural practices, the majority of antibiotic use occurs in food animals where these drugs have historically been used for growth promotion, in addition to prevention and treatment of disease. The widespread use of antibiotics combined with the application of human and animal wastes to agricultural fields introduces antibiotic-related contamination into the environment. While overt toxicity in organisms directly exposed to antibiotic in agroecosystems is generally not an issue due... |
| Tipo: Article |
Palavras-chave: Air Emissions; Animal; Runoff; Manure. |
| Ano: 2016 |
URL: http://eprints.nwisrl.ars.usda.gov/1614/1/1571.pdf |
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| Beniaich,Adnane; Silva,Marx Leandro Naves; Guimarães,Danielle Vieira; Bispo,Diêgo Faustolo Alves; Avanzi,Junior Cesar; Curi,Nilton; Pio,Rafael; Dondeyne,Stefaan. |
| ABSTRACT In the tropics, water erosion is one of the most important factors leading to the degradation and deterioration of agricultural land. Olive orchards have a low canopy coverage, especially during the first years after planting, due to the low density of olive trees. Given the fast expansion of olive orchards in Brazil, this study aimed to evaluate the effect of cover vegetation on soil and water losses under natural rainfall. In addition, it was assessed the crop performance and the vegetation cover index in different management systems in olive orchards. The study was carried out in soil erosion plots, where water and sediment were sampled and measured over two crops season, under the following treatments: in the first season, bare soil with olive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil conservation; Soil loss; Land degradation; Runoff; Olive cultivation. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832020000100503 |
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| Ghazalian, Pascal L.; Larue, Bruno; West, Gale E.. |
| This study investigates the determinants affecting producers’ adoption of some Best Management Practices (BMPs). Priors about the signs of certain variables are explicitly accounted for by testing for inequality restrictions through importance sampling. Education, gender, age, and on-farm residence are found to have significant effects on the adoption of some BMPs. Farms with larger animal production are more apt to implement manure management practices, crop rotation, and riparian buffer strips. Also, farms with larger cultivated acres are more inclined to implement herbicide control practices, crop rotation, and riparian buffer strips. Belonging to an agro-environment club has a positive impact for most BMPs. |
| Tipo: Journal Article |
Palavras-chave: Adoption; Bayesian analysis; Best management practices; Priors; Runoff; Water quality; Agribusiness; Agricultural and Food Policy; Crop Production/Industries; Farm Management; Food Consumption/Nutrition/Food Safety; Land Economics/Use; Livestock Production/Industries; Q12; Q25; C11. |
| Ano: 2009 |
URL: http://purl.umn.edu/56655 |
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| SILVA, A. de S.; BRITO, L. T. de L.; ROCHA, H. M.. |
| Em habitações rurais isoladas ou em pequenos povoados do semi-árido brasileiro, os sistemas convencionais de abastecimento de água para consumo humano tem seu emprego limitado. Com as adaptações realizadas pela EMBRAPA-CPATSA, moradias individuais ou comunitárias poderão ser abastecidas de água potável através do sistema de captação e conservação de água de chuva, que compreende a construção de cisternas de lona PVC, alvenaria, polietileno e pre-moldada. Neste trabalho, são apresentados coeficientes técnicos, custos comparativos para diferentes capacidades e metodos de dimensionamento, construção e manejo de cisternas rurais. |
| Tipo: Livros |
Palavras-chave: Captação de água de chuva; Captação in situ; Consumo humano; Cisterna rural; Escoamento superficial; Nordeste; Região semi-árida; Water resource; Human consumption; Rural cistern; Conservation; Northeast; Semi arid region; Irrigação; Cisterna; Chuva; Recurso Hídrico; Conservação; Irrigation; Rain; Runoff; Water harvesting. |
| Ano: 1988 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133211 |
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| SILVA, A. de S.; PORTO, E. R.; LIMA, L. T. de; GOMES, P. C. F.. |
| Desde 1979, o Centro de Pesquisa Agropecuária do Trópico Semi-Árido (CPATSA) vem desenvolvendo e adaptando técnicas de captação e conservação de água de chuva para consumo humano, com o objetivo de oferecer alternativas para solucionar ou amenizar o problema de escassez ou falta de água potável nas zonas rurais do semi-árido brasileiro. A técnica de captação aproveita o escoamento superficial da água de chuva, que neste região contribui para o desperdício de aproximadamente 36 bilhões de m3/ano. Neste trabalho, são apresentadas técnicas e métodos de dimensionamento, construção e manejo de cisternas rurais, que constitui uma das tecnologias mais simples, eficientes e duradouras para o abastecimento de água no meio rural. São apresentados modelos... |
| Tipo: Livros |
Palavras-chave: Consumo humano; Região semi-árida; Construção; Escoamento superficial; Convivência com seca; Captação de água de chuva; Recurso natural; Recurso hídrico; Água; Água Potável; Cisterna; Conservação; Runoff; Water resources. |
| Ano: 1984 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133227 |
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| Dota,Mara Andrea; Cugnasca,Carlos Eduardo; Barbosa,Domingos Sávio. |
| Agriculture, roads, animal farms and other land uses may modify the water quality from rivers, dams and other surface freshwaters. In the control of the ecological process and for environmental management, it is necessary to quickly and accurately identify surface water contamination (in areas such as rivers and dams) with contaminated runoff waters coming, for example, from cultivation and urban areas. This paper presents a comparative analysis of different classification algorithms applied to the data collected from a sample of soil-contaminated water aiming to identify if the water quality classification proposed in this research agrees with reality. The sample was part of a laboratory experiment, which began with a sample of treated water added with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmentalcontrol; Runoff; Wireless sensor networks; Machine learning; Data mining. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000200267 |
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| RODRIGUES, L. N.; PRUSKI, F. F.; AZEVEDO, J. A. de; SILVA, E. M. da. |
| RESUMO: Embora a água seja um dos principais componentes de produção a afetar a produtividade das culturas, sua variabilidade dentro da área irrigada é frequentemente ignorada. Acredita-se que isto seja devido à falta de instrumentos confiáveis para sua medição em tempo real como, por exemplo, aqueles existentes para medição de nitrogênio. Nota-se que há, nesta área do conhecimento, uma grande oportunidade para utilização de modelos computacionais, os quais são usualmente utilizados no dimensionamento e manejo de sistemas de irrigação e que, agora, poderão ser utilizados na geração de mapas de umidade do solo, os quais poderão auxiliar o projetista no momento de interpretar os mapas de rendimento. O objetivo do presente trabalho foi apresentar a... |
| Tipo: Livros |
Palavras-chave: Escoamento superficial; Irrigation equipment; Precision farming; Infiltration water; Agricultura de Precisão; Água; Evapotranspiração; Infiltração; Irrigação; Pivô Central; Solo; Evapotranspiration; Soil; Runoff. |
| Ano: 2005 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/571365 |
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| Bortolon,Leandro; Ernani,Paulo Roberto; Bortolon,Elisandra Solange Oliveira; Gianello,Clesio; Almeida,Rodrigo Gabriel Oliveira de; Welter,Samuel; Rogeri,Douglas Antônio. |
| Abstract The objective of this work was to assess the risk of phosphorus losses by runoff through an index based on the degree of P saturation (DPS), in cropland soils of Southern Brazil. Sixty-five highly representative cropland soils from the region were evaluated. Three labile P forms were measured (Mehlich-1, Mehlich-3, and ammonium oxalate), and four P sorption indexes were tested (phosphorus single sorption point and Fe+Al determined with the three extractors). Water-extractable P (WEP) was used as an index of P susceptibility to losses by surface runoff. The DPS was determined from the ratio between labile P and each sorption index. DPS values obtained from the ratio between Mehlich-1 P and the single P sorption point ranged from 1 to 25%, whereas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eutrophication; Runoff; Single P sorption point; Water quality. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901088 |
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| Registros recuperados: 68 | |
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