Buscar
Itens para a visualização no momento 1-10 of 10
Propriedades mecânicas em micro e mesoescala de solos do Rio Grande do Sul
(Universidade Federal de Santa Maria, 2015-03-06)
Susceptibility to soil degradation is a function of disturbance intensity and structure resistance, which is usually described by mesoscale properties. However, soil mechanical strength in the microscale (micromechanical) ...
Capacidade de preparos de solo reduzirem limitações físicas naturais de áreas de várzea para o cultivo de soja
(Universidade Federal de Santa Maria, 2015-08-14)
The soybean crop development in lowland soils in recent years has increased. The aim of this study was to investigate the capacity of the soil management to modify the physical environment of the soil, and analyze the role ...
Biota do solo em pastagem sob aplicação sucessiva de dejetos de suínos
(Universidade Federal de Santa Maria, 2015-01-12)
The successive use of pig slurry as a soil fertilizer on pasture areas is a common practice in southern Brazil. While there are economic benefits of reuse of waste, this practice poses serious environmental risks and can ...
Distribuição espacial de plantas na fileira e sua relação com a produtividade da cultura do milho
(Universidade Federal de Santa Maria, 2015-01-12)
Decreased variability in the distribution of plants on line and increased nitrogen fertilization efficiency are important order management for high yields in corn. The objective of this study was to evaluate the quality ...
Dinâmica do efluxo de CO2 e da decomposição de resíduos afetada pelo tipo de cultura de cobertura e sistema de preparo
(Universidade Federal de Santa Maria, 2015-02-24)
The liquid carbon accounting balance in the soil is important to identify agricultural practices that contribute to mitigation of global climate change. In this sense, research must be conducted to improve the accuracy of ...
Destino do carbono de raízes e parte aéreas de culturas de inverno enriquecidas com 13C em solo sob plantio direto
(Universidade Federal de Santa Maria, 2015-09-28)
Little is known about the decomposition and stabilization of shoots and intact roots derived carbon (C)
under no-tillage (no-till) field conditions. The present study was designed with following objectives:
1) evaluation ...
Estoque de carbono e nitrogênio em solo sob sistemas de manejo e culturas de inverno
(Universidade Federal de Santa Maria, 2015-03-11)
Soil organic matter (SOM) constitutes the largest reservoir of carbon (C) and nitrogen (N) of the earth's surface. In agricultural soils, the organic fraction is of great importance in maintaining soil quality, while ...
Retenção e liberação de fósforo em sedimento de fundo de açudes e córregos de pequenas bacias hidrográficas em um assentamento de reforma agrária
(Universidade Federal de Santa Maria, 2015-08-11)
Phosphorus (P) plays an important role in eutrophication of aquatic systems and the streams and pond bed sediments are an important environmental compartment in this process. The bed sediment can act as a sink or source ...
Hidrologia comparativa e perda de solo e água em bacias hidrográficas cultivadas com eucalipto e campo nativo com pastagem manejada
(Universidade Federal de Santa Maria, 2015-07-29)
The effect of forest plantations with eucalyptus on water resources in the Pampa
biome it has been little studied, resulting in a lack of information related to these
impacts especially on the watershed scale. The objective ...
Perdas de água e sedimento em bacias pareadas de ordem zero sob plantio direto com e sem terraço
(Universidade Federal de Santa Maria, 2015-07-28)
Tillage is a conservation technique for soil management, whose principles are avoiding soil
disturbance, straw maintenance on the surface and crop rotation. Currently, negligence in its
use leads to situations of land ...