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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 ...
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 ...
Dejetos de suínos: produção de culturas, efeitos na matéria orgânica e na transferência de formas de fósforo
(Universidade Federal de Santa Maria, 2014-04-23)
Swine production is an activity widely developed in southern Brazil that generates large volumes of
manure, which are normally used as sources of nutrients in grain crops and pastures. However, successive
applications ...
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 ...
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 ...
Caracterização de sedimento e de contaminantes numa microbacia hidrográfica antropizada
(Universidade Federal de Santa Maria, 2007-03-28)
The agricultural activities generate an impact on the environment that needs constant study to improve the understanding of the ways, levels and implantation of litigator practices of contamination. The study of contaminants ...