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Itens para a visualização no momento 11-20 of 74
Regularidade de resposta da cultura do milho à compactação do solo
(Universidade Federal de Santa Maria, 2012-08-27)
The hypothesis that soil compaction in no-tillage affects crop production has been
tested often, however, there is no regularity in the relationship between plant response and
soil compaction indexes that has allowed ...
Sistemas de culturas sob diferentes manejos por longa duração alteram as formas de fósforo do solo?
(Universidade Federal de Santa Maria, 2012-08-24)
The thesis objective was to evaluate the forms of accumulation and release of phosphorus from cover crops waste under long time of different soil management systems and its relationship with the soil phosphorus forms. The ...
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) ...
Emissão de óxido nitroso e metano em área de cultivo com arroz irrigado com diferentes manejos da palha pós-colheita
(Universidade Federal de Santa Maria, 2013-02-15)
Post-harvest rice straw managements can alter CH4 and N2O emissions and global
warming potential (GWP) in lowland areas cultivated with rice. In order to test this
hypothesis, the present study was planned to quantify ...
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 ...
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 ...