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Itens para a visualização no momento 21-30 of 79
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 ...
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 ...
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 ...
Ocorrência de agrotóxicos em águas rurais e bioacumulados em biofilmes epilíticos do Rio Grande do Sul
(Universidade Federal de Santa Maria, 2017-01-17)
In Brazil, agricultural activities have a high potential for contamination of water resources, especially by pesticides use. This potential is highest in river basins where agriculture is developed out of agricultural ...
Composto orgânico: composição, mineralização e produção de cultivar de porta-enxerto de nogueira-pecã (Carya illinoinensis (Wang) K.)
(Universidade Federal de Santa Maria, 2017-02-23)
Fruit and vegetable residue (FVR) can be used for the production of organic compost, which when mineralized may provide nutrients to fruit trees, such as the Pecan (Carya illinoinensis (Wang) K.). The objective of the study ...
Cobre e zinco no solo: crescimento e parâmetros fisiológicos em videiras jovens e aveia preta
(Universidade Federal de Santa Maria, 2017-11-10)
The Campanha Gaúcha is one of the main wine regions of Brazil that suffers from climatic factors favorable to the development of fungal diseases on the leafs of the grapevine (Vitis vinifera). Generally, the control of ...
Aplicação do modelo daycent na simulação dos fluxos de óxido nitroso e dos estoques de carbono no solo com o uso de adubação orgânica em plantio direto
(Universidade Federal de Santa Maria, 2017-07-31)
The application of organic residues from pig and poultry farming in no-till is a common practice in southern Brazil for nutrient cycling. Although this practice has a positive effect on crops productivity and soil C ...