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Itens para a visualização no momento 11-20 of 104
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 ...
Modelagem do terreno e mapeamento digital de solos por extrapolação das relações solo-paisagem
(Universidade Federal de Santa Maria, 2016-05-31)
Research on digital soil mapping (DSM) in Brazil is subject to the existence of legacy soil data obtained through conventional methods for extrapolation of soil-landscape relations. In areas with no available soil maps, ...
Sistemas e manejos agrícolas modulam componentes multitróficos no solo
(Universidade Federal de Santa Maria, 2016-04-29)
Soil microbiome and relationships with soil meiofauna are important for the stability and
functionality of agroecosystems, including their potential effects on soil suppressiveness.
However, little is know about how farming ...
Dinâmica dos escoamentos na modelagem da produção de sedimentos em uma pequena bacia rural
(Universidade Federal de Santa Maria, 2016-03-01)
The models based on spatially distributed processes describe erosion and sediment yield using a physical approach of the mechanisms. In general, these models require high quality input data, description of the landscape, ...
Dinâmica do fósforo de sedimentos oriundos de bacia hidrográfica subtropical compoluição rural e urbana
(Universidade Federal de Santa Maria, 2015-11-23)
Areas at steep slopes in the catchments with high occupation by family farmers in Southern Brazil, even with a high surface covered with regenerated forests, are characterized by the persistence of sources of rural and ...
Estratégias para descompactação do solo por escarificação e hastes sulcadoras em sistema plantio direto
(Universidade Federal de Santa Maria, 2015-03-16)
In areas managed under no-till in southern Brazil the soil compaction process has been associated with structural degradation of subsurface soil layer, visible by changes in soil physical properties, morphological changes ...
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) ...
Fontes orgânicas e Mineral: produção de culturas, alteração nos atributos químicos do solo e transferência de formas de nitrogênio e de fósforo
(Universidade Federal de Santa Maria, 2015-03-30)
The pig slurry, pig deep-litter and cattle slurry applied in soils under no-tillage can serve as a source of nutrients for crops, increasing the production of dry matter of shoots and grain production. This is because, ...
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 ...