Buscar
Itens para a visualização no momento 41-50 of 158
Liberação de potássio e alteração mineralógica em argissolos subtropicais
(Universidade Federal de Santa Maria, 2014-02-24)
The potassium (K) of a given soil depends primarily on its parent material. The K in the soil can be conceptually divided into: structural K, non-exchangeable K, exchangeable K, and K in the solution. Studies have shown ...
Efeito residual de intervenções mecânicas para descompactação do solo manejado sob sistema plantio direto
(Universidade Federal de Santa Maria, 2011-03-03)
The compaction became one of the main causes for soil degradation in agricultural areas, being directly related to the soil management system adopted. This situation can be observed in the Brazil humid subtropical climate ...
Decomposição de resíduos culturais de plantas de cobertura de solo e emissões de óxido nitroso
(Universidade Federal de Santa Maria, 2012-02-28)
The inclusion of summer cover crops (SCC) in the no-till system is an interesting alternative to promote the addition of elevated quantities of plant biomass and nitrogen (N) to the soil. The C and N dynamics during the ...
Resposta de genótipos de cana-de-açucar à inoculação de bactérias diazotróficas no Rio Grande do Sul
(Universidade Federal de Santa Maria, 2011-07-28)
In southern Brazil is unknown the effect of diazotrophs inoculation in sugarcane
(Saccharum officinarum). The evaluation of this practice and the selection of genotypes with
high potential for biological N fixation (BNF) ...
Controle de qualidade de análises de solos da rede Rolas - RS/SC e procedimentos estatísticos alternativos
(Universidade Federal de Santa Maria, 2012-02-15)
Soil chemical analysis must be accurate to avoid errors in the recommendations of lime and fertilizers. The quality control program of the ROLAS-RS/SC network evaluates the analysis accuracy by the distance of a result, ...
Emissões de amônia e óxido nitroso após aplicação de dejetos de bovinos na semeadura e ureia em cobertura na sucessão trigo/milho em plantio direto
(Universidade Federal de Santa Maria, 2016-11-25)
The application of dairy slurry (DS) to the soil surface in no-till can result in the ammonia (NH3) and nitrous oxide (N2O) emission to atmosphere, with negative repercussions both agronomical and environmentally. The ...
Nitrogênio de resíduos de culturas de verão em frações físicas da matéria orgânica de dois solos de terras baixas
(Universidade Federal de Santa Maria, 2018-11-06)
Rio Grande do Sul has about 20% of its total area of soils with hydromorphic characteristics, denominated lowlands suitable for rice cultivation (Oryza sativa) irrigated by flooding. In order to mitigate damage caused by ...
Nitrogênio na solução do solo e aspectos nutricionais e fisiológicos do milho cultivado após 12 anos sob fontes orgânicas e mineral
(Universidade Federal de Santa Maria, 2018-07-19)
Animal manures are frequently utilized in agriculture as a source of nutrients, especially nitrogen (N). The
objective of this work was to evaluate how the application of manure from different animal breeding systems
during ...
Capacidade de preparos de solo reduzirem limitações físicas naturais de áreas de várzea para o cultivo de soja
(Universidade Federal de Santa Maria, 2015-08-14)
The soybean crop development in lowland soils in recent years has increased. The aim of this study was to investigate the capacity of the soil management to modify the physical environment of the soil, and analyze the role ...
Redistribuição de sedimentos em encostas por meio do C total e do isótopo 13C
(Universidade Federal de Santa Maria, 2017-07-17)
High intensity of rains, associated with inadequate management in agricultural areas, have been caused loss of large volumes of soil by erosion, leading the sediments and nutrients to the hydric sources. The loss of sediments ...