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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 ...
Volatilização de amônia dos dejetos líquidos de suínos aplicados em plantio direto: quantificação e estratégias de mitigação
(Universidade Federal de Santa Maria, 2017-07-31)
Ammonia volatilization is the primary cause of nitrogen loss from liquid pig slurry (PS). To measure this physical-chemical process and establish strategies for its mitigation is crucial to decrease environmental and ...
Carbono-¹³C de raízes e parte aérea de culturas de verão em frações físicas da matéria orgânica de dois solos de várzea
(Universidade Federal de Santa Maria, 2017-07-31)
Crop diversification in lowland areas in Rio Grande do Sul is incorporating sorghum (Sorghum bicolor) and soybean (Glycine max) into rotation system with irrigated rice (Oryza sativa). Little is known about the impact of ...
Preparos do solo para eucalipto em segunda rotação: propriedades físicas e químicas e crescimento inicial
(Universidade Federal de Santa Maria, 2017-02-24)
Reforestation areas of forest plantation, which are cultivated in a second rotation, may have the soil structure altered by compaction from the surface to the deeper layers, because of the traffic of machines during ...
Adaptações na teoria de Green-Ampt para modelar a infiltração de água no solo
(Universidade Federal de Santa Maria, 2017-02-22)
The mathematical modeling of water infiltration into soil on a profile scale with the Green-Ampt (GA) model corresponds to the theme of this dissertation. The GA model, in this dissertation, was considered a physical-empirical ...
Modelagem do excedente de infiltração para avaliar a funcionalidade hidrológica do solo
(Universidade Federal de Santa Maria, 2017-07-28)
The soil ability to compartmentalize water in the hydrological cycle can be studied in terms of the soil physical quality and might be indicated by soil’s properties, attributes or process. Of these, the processes are more ...
Modelagem matemática do escoamento superficial na escala de encosta sob plantio direto
(Universidade Federal de Santa Maria, 2017-02-24)
The runoff generation over fields with no-tillage agriculture management remains being a problem with environment, social and economic impacts. The purpose of this research was evaluate the capacity of a physic based and ...
Efeito da intensidade de pastejo na estrutura da comunidade de aranhas do solo
(Universidade Federal de Santa Maria, 2017-07-20)
Soil fauna assumes a strategic role as a bioindicator of the level of intensification that can be
put to agroecosystem. Soil spiders can help understanding the effects of farming practices on
systems that seek to combine ...
Formas de aplicação e tipos de corretivo da acidez do solo: alterações nos atributos químicos em profundidade em longo prazo
(Universidade Federal de Santa Maria, 2017-07-21)
The main interest of the soils acidity correction is to neutralize the exchangeable Al3+, since
the presence of this form of Al in the soil causes restriction of root growth and consequently
the decrease of the productivity ...
Variação de parâmetros dendrométricos de Pinus taeda L. e a distribuição espacial de atributos do solo por técnicas de mapeamento digital de solos
(Universidade Federal de Santa Maria, 2017-07-27)
The study of the relationship between yield potential and the conditions offered to the development of forest stands is fundamental for the adequate management of the forest, aiming at maximum sustainable yield. Considering ...