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High nutrient retention in chronically nutrient-rich lowland streams
(University of Chicago Press, 2016-12)
Nutrient retention has been studied intensively in streams, but some mechanisms and processes are not yet entirely understood, especially in open-canopy streams. We evaluated PO43−, as soluble reactive P (SRP), and NH4+ ...
Amazon deforestation alters small stream structure, nitrogen biogeochemistry and connectivity to larger rivers
(SPRINGER, 2011)
Human activities that modify land cover can alter the structure and biogeochemistry of small streams but these effects are poorly known over large regions of the humid tropics where rates of forest clearing are high. We ...
Agriculture influences ammonium and soluble reactive phosphorus retention in South American headwater streams
(John Wiley & Sons Inc, 2019-12)
Agricultural activities can affect the delivery of nutrients to streams, riparian canopy cover, and the capacity of aquatic systems to process nutrients and sediments. There are few measures of nutrient uptake and metabolism ...
Eficiência de absorção de nitrogênio e dinâmica do crescimento do sistema radicular de Vitis vinifera e Eucalyptus sp. submetidos à adubação nitrogenada
(Universidade Federal de Santa MariaBrasilAgronomiaUFSMPrograma de Pós-Graduação em Ciência do SoloCentro de Ciências Rurais, 2019-07-30)
Sandy soils and with low organic matter content do not provide provide enough nitrogen (N) to supply the demand of
Vitis vinifera and Eucalyptus sp. However, the applied N is not always used in large quantities by these ...
Evaluation of the kinetics of oxidation and removal of organic matter in the self-purification of a mountain river
(Universidad Nacional de Colombia (Sede Medellín). Facultad de Minas., 2015-05-01)
The study is based on the determination of the kinetic rates and assessment of self-purification of the Frio River, due to the uptake of organic load. The kinetic rates were calculated by applying differential and logarithmic ...
Dinâmica do nitrogênio no solo em razão da calagem e adubação nitrogenada, com palha na superfície
(Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), 2003-02-01)
Em sistemas com semeadura direta, a calagem tem sido aplicada superficialmente, causando excesso de calcário nos primeiros centímetros do perfil do solo, onde também é aplicado o N em cobertura e a densidade de comprimento ...
Dinâmica do nitrogênio no solo em razão da calagem e adubação nitrogenada, com palha na superfície
(Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), 2003-02-01)
Em sistemas com semeadura direta, a calagem tem sido aplicada superficialmente, causando excesso de calcário nos primeiros centímetros do perfil do solo, onde também é aplicado o N em cobertura e a densidade de comprimento ...