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Perdas de nitrogênio por volatização de amônia e eficiência da adubação nitrogenada na cultura do arroz irrigado
(Universidade Federal de Santa Maria, 2006-03-20)
This work was developed using two greenhouse and two field experiments,
during 2004/2005 agricultural season at the Federal University of Santa Maria, Rio
Grande do Sul state. The objective was to evaluate nitrogen loss ...
Associação de fungos ectomicorrízicos com espécies florestais nativas do estado do Rio Grande do Sul
(Universidade Federal de Santa Maria, 2006-02-24)
The work was development in Forestry Fepagro, Santa Maria, RS and in Laboratory of Biology and Microbiology of Soil and Environment Prof. Marcos Rubens Fries, from Department of Soil of Federal University of Santa Maria. ...
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 ...
Sistemas de cultivo da cultura do fumo com ênfase às práticas de manejo e conservação do solo
(Universidade Federal de Santa Maria, 2006-02-23)
Soil management systems with minimum tillage and mulch are predominant in agriculture of Southern of Brazil. No-tillage for tobacco crop is not common and restricted to isolated places and only for some farmers that, through ...
Balanço químico em seis conjuntos solo-saprolito do Rio Grande do Sul
(Universidade Federal de Santa Maria, 2006-04-11)
The knowledge and the determination of the flow and production of elements for the bad weather are important, once they allow understanding the interactions among biological phenomena, hydrological and climatologically, ...
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 ...
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 ...