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Influência dos resíduos vegetais na superfície do solo na dinâmica de evaporação da água e temperatura do solo
(Universidade Federal de Santa Maria, 2010-05-21)
The availability and proper management of water represent fundamental aspects of the development of sustainable agricultural production systems, since it has direct impact on crop productivity. Maintaining crop residues ...
Mineralogia e liberação de potássio em solos de várzea do Rio Grande do Sul
(Universidade Federal de Santa Maria, 2010-04-09)
The cultivation of flooded rice in Rio Grande do Sul (RS) does not always respond to potassium (K) fertilization, even when the availability is considered low or medium. Other K forms not estimated by the method of analysis ...
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 ...
Classificação do potencial de uso das terras no perímetro urbano de Santa Maria - RS
(Universidade Federal de Santa Maria, 2005-02-23)
In the last decades, the phenomenon of the urbanization has been transforming a large natural spaces into an extremely altered areas. The conversion of a rural society to an urban one has happened without caring with life ...
Qualidade física de solos irrigados do Rio Grande do Sul e do Brasil central
(Universidade Federal de Santa Maria, 2005-02-28)
The irrigated áreas are caracterized by an intensification of the land use, and as consequence, an intense use of the soil. This usually results in a higher pressure of the soil structure degradation, causing many times ...
Efeito do calcário em atributos biológicos do solo
(Universidade Federal de Santa Maria, 2005-02-28)
The soil is a complex system composed by live organisms, organic matter, gases, water and minerals parts that interact. In this sense, the soil organisms, besides inhabitants, are part of its composition. In the soil, the ...
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 ...
Recomendação de nitrogênio e potássio para trigo, milho e soja sob sistema plantio direto no Paraguai
(Universidade Federal de Santa Maria, 2005-08-08)
More than 50% of the cultivated areas in the Southern Brazil and more than 60% of the cultivable area in Paraguay adopted the no-tillage system. This system went through several improvements, but there are still doubts ...
Decomposição e liberação de nitrogênio da palha cana-de-açucar em função do ambiente e quantidade de palha
(Universidade Federal de Santa Maria, 2014-07-28)
The sugarcane residues came out as an important source of biomass for the production of
cellulosic ethanol in Brazil. However, there is a lack of studies on the impact that how partial
removal of these residues affect the ...
Efeito do fungo micorrízico arbuscular e do vermicomposto na fitorremediação do cobre em solo arenoso
(Universidade Federal de Santa Maria, 2014-09-12)
Introduction and objectives: Arbuscular mycorrhizal fungi and vermicompost may decrease the deleterious effects of copper on plants. The goal of the present study was to evaluate the effect of inoculation with the fungus ...