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Itens para a visualização no momento 11-20 of 158
Mineralogia e liberação de potássio em solos de várzea do Rio Grande do Sul
(Universidade Federal de Santa Maria, 2010-04-09)
The cultivation of flooded rice in Rio Grande do Sul (RS) does not always respond to potassium (K) fertilization, even when the availability is considered low or medium. Other K forms not estimated by the method of analysis ...
Características físicas e químicas de sedimentos em suspensão durante eventos fluviométricos em bacias hidrográficas do sul do Brasil
(Universidade Federal de Santa Maria, 2014-08-11)
The observed high sediment load in the rivers of southern Brazil is strongly related to the degradation of agricultural soils due to water erosion. Currently there is great interest in describing the erosive processes and ...
Fluxos de fósforo em uma bacia hidrográfica sob cultivo intensivo no sul do Brasil
(Universidade Federal de Santa Maria, 2014-09-08)
Eco-environments from sweet water are crucially important, as they provide water for multiple purposes, including human and animal consumption, irrigation and entertainment. However, its quality can suffer significant ...
Decomposição e liberação de nitrogênio da palha cana-de-açucar em função do ambiente e quantidade de palha
(Universidade Federal de Santa Maria, 2014-07-28)
The sugarcane residues came out as an important source of biomass for the production of
cellulosic ethanol in Brazil. However, there is a lack of studies on the impact that how partial
removal of these residues affect the ...
Efeito do fungo micorrízico arbuscular e do vermicomposto na fitorremediação do cobre em solo arenoso
(Universidade Federal de Santa Maria, 2014-09-12)
Introduction and objectives: Arbuscular mycorrhizal fungi and vermicompost may decrease the deleterious effects of copper on plants. The goal of the present study was to evaluate the effect of inoculation with the fungus ...
Avaliação da qualidade física de solos irrigados do Rio Grande do Sul e de funções de pedotransferência para a estimativa da retenção de água
(Universidade Federal de Santa Maria, 2016-06-17)
Knowledge of the physical and hydric characteristics of the soil is essential for proper management, aimed at conciliate good yields and soil quality. In agriculture, crop productivity tends to be maximized and environmental ...
Formas de fósforo no tecido de videiras: acúmulo, redistribuição e relação com parâmetros produtivos e composição da uva
(Universidade Federal de Santa Maria, 2016-07-29)
In grapevine production, requirement and phosphorus (P) doses are established on the basis total P content in leaves collected, change in color of fruit and productivity. Phosphorus absorbed, can be accumulated in plant ...
Desenvolvimento de pedotransferência física-empírica para Modelagem da retenção de água no solo
(Universidade Federal de Santa Maria, 2016-02-25)
Soil water retention stems from the action of attractive forces manifested by adsorption and capillary
phenomena. Matric potential (ψ) expresses the soil water retention energy, which varies ...
Aplicação superficial de calcário: até onde migram e até quando persistem os efeitos no perfil do solo?
(Universidade Federal de Santa Maria, 2014-08-04)
Soil acidity is a major limiting factor in crop production. The low solubility of lime is a critical
limitation which restricts its dissolution as well as neutralization of soil acidity in the vicinity of its
particles. ...
Dinâmica do nitrogênio-15N de palha de arroz, soja e sorgo em dois solos de várzea
(Universidade Federal de Santa Maria, 2016-07-29)
The use of alternative crops to rice (Oryza sativa L.), such as soybean (Glycine Maxl.) and sorghum (Sorghum bicolor L.) in lowland areas changes the chemical characteristics of the straw returned to soil. Straw quality ...