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Fósforo na água e no sedimento na microbacia hidrográfica do Arroio Lino - Agudo - RS
(Universidade Federal de Santa Maria, 2005-02-19)
The natural ecosystems are modificated by human activities, charging the nutrients and sediments transference to aquatic environments. Our objective were to study the phosphorus (P) dynamic in little cracks after rainfall ...
Características físicas e químicas de sedimentos em suspensão durante eventos fluviométricos em bacias hidrográficas do sul do Brasil
(Universidade Federal de Santa Maria, 2014-08-11)
The observed high sediment load in the rivers of southern Brazil is strongly related to the degradation of agricultural soils due to water erosion. Currently there is great interest in describing the erosive processes and ...
Estimativa da disponibilidade de fósforo para a cultura do arroz irrigado em solos do RS
(Universidade Federal de Santa Maria, 2004-12-17)
The evaluation of the available phosphorus (P) is hindered in lowland soils flooded for the rice cultivation, since the alternation in the oxidation and reduction conditions determine modifications in the dynamics of this ...
Variabilidade do fósforo extraído causada pela variação analítica nos métodos Mehlich - 1 e 3
(Universidade Federal de Santa Maria, 2013-02-25)
Performing a soil analysis requires a series of operations so a specific element may be conveniently
extracted to be then detected or measured. Protocol methods have been adjusted to facilitate the
execution, however here ...
Calibração visando recomendações de fertilização fosfatada para as principais culturas de grãos sob sistema plantio direto no Paraguai
(Universidade Federal de Santa Maria, 2005-08-08)
At present time, 60% of the grain crop area in Paraguay is under the no-till (NT)
system. This fact puts the country as a leader in this conservation practice. With the
expansion of NT in the country, some questions were ...
Balanço e evolução temporal de fósforo e potássio em três solos sob sistema plantio direto no Paraguai
(Universidade Federal de Santa Maria, 2010-02-26)
Soybean, corn and wheat crops occupy actually 70% of the agricultural areas of Paraguay, with increasing fertilization consumption, suggesting the necessity of an
efficient use of this input. The objectives of this work ...
Liberação de fósforo e potássio durante a decomposição de palha de cana-de-açúcar sob diferentes taxas de remoção da palha
(Universidade Federal de Santa Maria, 2022-02-24)
The mechanized harvesting of sugarcane (Saccharum officinarum L.) results in large amounts
of straw deposited on the soil surface, arousing the interest of industries in its use for the
production of bioethanol and ...
Alterações e transferências de fósforo do solo para o meio aquático com o uso de dejeto líquido de suínos
(Universidade Federal de Santa Maria, 2006-02-22)
The pig slurry may work as nutrients source, however when is used is an improper way can cause accumulation of phosphorus in the soil, that later can be transferred to the aquatic environment causing eutrophication. Objective ...
Perdas de nutrientes associadas ao escoamento e aos sedimentos erodidos em encostas sob plantio direto
(Universidade Federal de Santa Maria, 2022-01-31)
No-tillage (NT) is widely used in areas of grain crops in tropical and subtropical regions.
However, crops fields under NT with low phytomass addition and without runoff control
practices are highly susceptible to ...