Buscar
Itens para a visualização no momento 231-240 of 266
Nitrato na solução do solo e na água de fontes para consumo humano numa microbacia hidrográfica produtora de fumo
(Universidade Federal de Santa Maria, 2006-11-24)
The tobacco production system in Rio Grande do Sul state is mainly developed in small farms, using shallow soils in steep slope. In these areas rivers are born forming small
watersheds. The areas are fragilized by use of ...
A insustentabilidade do uso do solo com fumicultura em terras declivosas
(Universidade Federal de Santa Maria, 2007-02-22)
Areas susceptibility to water erosion and strong pressure of soil use, as in Southern Brazil, where there is cultivation of tobacco, are prone to degradation of the natural resources. The objective of this dissertation was ...
Alterações de propriedades físico-hídricas em solos arenosos do bioma Pampa sob usos distintos
(Universidade Federal de Santa Maria, 2023-02-28)
The naturally fragile sandy soils of the pampa biome (BP) are being degraded with the
introduction of poorly managed agricultural crops. Anthropic use can markedly decrease
vegetation cover on sandy soils, leaving them ...
Variabilidade espacial e estimativa da condutividade hidráulica e caracterização física-hídrica de uma microbacia hidrográfica rural
(Universidade Federal de Santa Maria, 2009-02-27)
The soil management systems involve changes in soil physico-hydrical properties. The objective of this study was (i) characterize the soil physico-hydrical properties in the layer 0-5 cm for different soil management systems ...
Mineralização do carbono e do nitrogênio no solo com o uso de lodo de esgoto e palha de aveia
(Universidade Federal de Santa Maria, 2009-02-27)
The use of sewage sludge in the agricultural is an organic recycle alternative material in the soil. The CONAMA resolution 375/2006 indicates that in certain relief
condition the sewage sludge could be applied without ...
Produção de sementes de Lupinus albescens para recuperação de áreas degradadas por arenização
(Universidade Federal de Santa Maria, 2009-09-28)
The objective of this work was to evaluate the best sowing time allied to appropriate fertilization levels for the development of Lupinus albescens, seeking seeds production, in sandy area, and also to verify the adaptation ...
Aplicação de componentes principais e regressões logísticas múltiplas em sistema de informações geográficas para a predição e o mapeamento digital de solos
(Universidade Federal de Santa Maria, 2008-10-31)
Social demands on soil information have grown dramatically, meanwhile the soil surveys are seldom carried out in the country. Digital soil mapping techniques
can be applied to infer the spatial distribution of soil from ...
Variação temporal da estrutura do solo em sistemas integrados de cultivo da cebola no Uruguai
(Universidade Federal de Santa Maria, 2008-07-08)
The social and economical importance of onion in Uruguai is very relevant. The soil mobilization and ridge till are crucial to reduce bulk density and increase the
macro/micropores relation for Argiudoll, to induce ...
Recomendação de nitrogênio, fósforo e potássio para girassol sob sistema plantio direto no Paraguai
(Universidade Federal de Santa Maria, 2008-03-19)
Sunflower crop has some important agronomic characteristics, as great fitomassa production,
larger resistance to the drought, cold and heat than most of the cultivated species and wide
adaptability to different conditions ...
Eficiência na absorção e proposição de níveis críticos de nutrientes em citros
(Universidade Federal de Santa Maria, 2022-08-31)
Citrus plants adapt well in tropical, temperate, and subtropical countries, which turns them of
great importance to the agriculture sector. Usually, kinetics parameters related to nutrient
uptake are not evaluated, that ...