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Itens para a visualização no momento 21-30 of 104
Adubação nitrogenada em videiras jovens e em produção
(Universidade Federal de Santa Maria, 2014-02-27)
In the Campanha Gaúcha from Rio Grande do Sul State (RS), vines has been cultivated under
sandy soils with low organic matter content; therefore they have a low nitrogen (N) supply
capacity and inputs of N fertilizers are ...
Modelagem de processos erosivos em uma bacia agrícola: limitações e possibilidades
(Universidade Federal de Santa Maria, 2017-03-01)
The growing demand for modeling tools able represent erosive processes in catchments, and their connections, requires that mathematical modelling be associated with monitoring. This doctoral thesis sought to contribute to ...
Fitorremediação do cobre em vinhedos: efeito do fungo micorrízico arbuscular, minhocas e vermicomposto
(Universidade Federal de Santa Maria, 2018-07-16)
The high copper level in sandy soils of the Campanha Gaúcha, resulting from the successive copper-based fungicides application, lead to environmental contamination and toxicity in cover crops and young vines. The ...
Efluxo de metano relacionado com ácidos orgânicos no solo e carbono de exsudados radiculares no cultivo do arroz irrigado
(Universidade Federal de Santa Maria, 2018-07-20)
In worldwide greenhouse gases generation (GHGs) agriculture is one of the principal activities. In Brazil, as a reflection of the importance agriculture in economy, it is estimated that 75% of emissions of carbon dioxide ...
Medição e simulação da temperatura e conteúdo de água em argissolo sob resíduos de aveia
(Universidade Federal de Santa Maria, 2017-01-27)
This research was conducted with the objective of studying the dynamics of soil temperature and water content as a function of the different amounts of black oat residue (Avena sativa Schreb.) in the soil cover, through ...
Interação entre remoção de palha e adubação nitrogenada sobre a volatilização de NH3 e emissão de N2O na cultura da cana-de-açúcar
(Universidade Federal de Santa Maria, 2018-07-27)
Brazil has an area of 8.74 million hectares cultivated with sugarcane. Currently, 90% of this
area is mechanically harvested without fire which results in large amounts of straw (7 to 25 Mg
DM ha-1) remaining on the soil ...
Plantas de cobertura do solo e videiras: toxidez, fitorremediação e mecanismos de tolerância ao excesso de cobre
(Universidade Federal de Santa Maria, 2018-06-28)
The application of copper fungicides for the management of foliar diseases in grapevines (Vitis vinifera) increases copper (Cu) content in vineyard soils. This has been diagnosed in several traditional grape growing regions ...
Espectroscopia do solo no Vis-IR: potencial predictivo e desenvolvimento de uma interface gráfica de usuário em R
(Universidade Federal de Santa Maria, 2017-02-06)
This thesis presents a study of Visible Near-infrared spectroscopy technique applied to predict soil properties. The purpose was to develop quantitative soil information due to the demand of digital soil mapping, environmental ...
Caracterização química e liberação de nitrogênio de compostos e vermicompostos de casca de arroz e dejetos de animais
(Universidade Federal de Santa Maria, 2016-12-16)
Composting and vermicomposting reduce the volume of wastes and improve their characteristics of use, as fertilizer. However, there is a lack of information about how to use them, depending on the processes and raw materials ...
Bioindicadores de qualidade do solo em um sistema integrado de produção agropecuária
(Universidade Federal de Santa Maria, 2016-12-07)
Integrated crop‑livestock systems (ICLS) can improve the chemical, physical and biological soil attributes. However, grazing intensification may outweigh these benefits and cause severe losses to the system. Soil biota is ...