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Caracterização de bactéria fixadora de nitrogênio em Lupinus albescens
(Universidade Federal de Santa Maria, 2007-02-22)
The objective of this work was to characterize promising isolated rhizobium of L. albescens in the nitrogen biological fixation. Two hundred and four isolates were obtained from three species of lupine (L. albescens, L. ...
Atributos físicos do solo em sistemas de culturas sob plantio direto na integração lavoura-pecuária
(Universidade Federal de Santa Maria, 2005-04-30)
The integration between agriculture and cattle-raising has growing up in the last few years in Rio Grande do Sul state, Brazil. With the aim to evaluate the changes in some physical soil properties caused by different ...
Diagnóstico da fertilidade de solos em áreas sob plantio direto consolidado
(Universidade Federal de Santa Maria, 2006-02-16)
The soybean average productivity in Rio Grande do Sul presents great oscillations which are attributed to climatic adversities. The productivity can also be afected by soil fertility limitations, specially acidity and P ...
Dinâmica do enxofre no sistema solo e resposta das culturas à adubação sulfatada
(Universidade Federal de Santa Maria, 2006-02-24)
The conversion of pastures natives to grain production in soils with low clay and organic matter levels and/or the non-replacement of the exported sulfur by crops could cause a decrease on the availability of this nutrient ...
Estimativa do estado nutricional de arroz irrigado por alagamento
(Universidade Federal de Santa Maria, 2007-02-15)
The difficulty to predict the intensity of soil properties alterative by soil flooding frequently makes the interpretation of the soil analysis results inaccurate when considering nutrients availability to the plants. ...
Aptidão, evolução e conflitos de uso das terras no município de Itaara, RS
(Universidade Federal de Santa Maria, 2007-02-28)
The landscape is constantly altered by the man's action. The rational use of the natural resources and space it should be done in agreement with the natural vocation of the environment. For so much it is necessary the ...
Efeito do cobre na população de bactérias e fungos do solo, associação ectomicorrízica e no desenvolvimento de mudas de eucalipto e canafístula
(Universidade Federal de Santa Maria, 2006-12-07)
The microrganisms are sensitive to the presence of determined concentrations of copper being considered biorremediadores able to move metal through active and passive processes, accumulating them in his cellular compartments ...
Nitrato na solução do solo e na água de fontes para consumo humano numa microbacia hidrográfica produtora de fumo
(Universidade Federal de Santa Maria, 2006-11-24)
The tobacco production system in Rio Grande do Sul state is mainly developed in small farms, using shallow soils in steep slope. In these areas rivers are born forming small
watersheds. The areas are fragilized by use of ...
A insustentabilidade do uso do solo com fumicultura em terras declivosas
(Universidade Federal de Santa Maria, 2007-02-22)
Areas susceptibility to water erosion and strong pressure of soil use, as in Southern Brazil, where there is cultivation of tobacco, are prone to degradation of the natural resources. The objective of this dissertation was ...
Variabilidade espacial e estimativa da condutividade hidráulica e caracterização física-hídrica de uma microbacia hidrográfica rural
(Universidade Federal de Santa Maria, 2009-02-27)
The soil management systems involve changes in soil physico-hydrical properties. The objective of this study was (i) characterize the soil physico-hydrical properties in the layer 0-5 cm for different soil management systems ...