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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, ...
Fertilizantes orgânicos: Índice de eficiência e produção de alface, cenoura e mudas de eucalipto
(Universidade Federal de Santa Maria, 2015-08-28)
The process of transformation and stabilization of organic materials, like traditional compost and vermicompost, increase the efficiency of biofertilizers production. This work aimed to quantify the N mineralization and ...
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 ...
Identificação de fontes de sedimento em bacias hidrográficas rurais do sul do Brasil
(Universidade Federal de Santa Maria, 2015-03-05)
Knowledge of the main diffuse sources of sediment can enhance efficiency in the use of public resources invested in soil conservation management strategies. Conventional fingerprinting methods based on geochemical composition ...
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 ...