Buscar
Itens para a visualização no momento 121-130 of 158
Controle do escoamento superficial e das perdas de solo em sistema plantio direto na escala de lavoura
(Universidade Federal de Santa Maria, 2016-07-29)
The evidence of the formation of surface flow and associated processes such as erosion, transfer of solutes, organic matter and nutrients, are the consequences of soil management not contributing to the maintenance of soil ...
Supressão do nematoide Pratylenchus brachyurus e estímulo ao crescimento da soja por fungo micorrízico arbuscular
(Universidade Federal de Santa Maria, 2016-02-11)
The production expansion areas of soybean monoculture system result in increased fertilizers and pesticides application, and the intensification of some phytosanitary problems such as the damage caused by plant-parasitic ...
Dinâmica do fósforo em solo muito argiloso sob diferentes preparos de solo e culturas de inverno
(Universidade Federal de Santa Maria, 2011-02-28)
The cultivation of plants with different skills of acquisition and absorption of phosphorus (P) under different tillage systems for a long period of time can alter the cycling and distribution of P forms in soil. The aim ...
Infiltração de água no solo condicionadas pelo uso de plantas de cobertura
(Universidade Federal de Santa Maria, 2017-03-02)
The inclusion of cover crops in agricultural production systems has received attention for the ability to improve the multifunctionality of the soil. In order to improve soil structure and soil physical-hydric properties, ...
Identificação do limite entre solo e saprolito em argissolos bruno-acinzentados derivados de rochas sedimentares
(Universidade Federal de Santa Maria, 2012-02-12)
The Argissolos (Ultisols and Alfisols) derived from sedimentary rocks occur in the region of Central Depression of the Rio Grande do Sul state, over siltstones and sandstones in the soft wavy reliefs. These soils are ...
Perdas de água e variações na temperatura de um argissolo vermelho em função de diferentes quantidades de resíduos vegetais na superfície e espaçamentos entre linhas do feijoeiro
(Universidade Federal de Santa Maria, 2011-02-25)
Irrigation is an alternative to minimize fluctuations in grain production and yield due to water deficiency. However, to prevent water losses and to improve the
efficiency of this use, the irrigation management has to be ...
Perdas de água e sedimento em bacias pareadas de ordem zero sob plantio direto com e sem terraço
(Universidade Federal de Santa Maria, 2015-07-28)
Tillage is a conservation technique for soil management, whose principles are avoiding soil
disturbance, straw maintenance on the surface and crop rotation. Currently, negligence in its
use leads to situations of land ...
Perdas de solo e água por erosão hídrica em sistemas de culturas oleaginosas
(Universidade Federal de Santa Maria, 2010-03-30)
The sustainability of vegetable oils production is in the dependence of the agricultural practices, being the erosion the most preoccupying form of soil degradation. In this way, was carried out a study in the UFSM campus, ...
Ocorrência de hidrofobicidade em solos do Rio Grande do Sul
(Universidade Federal de Santa Maria, 2011-10-14)
The hydrophobicity can be understood as the soil water repellency, making it difficult to wetting the same. This phenomenon is associated with the coating of soil particles by hydrophobic organic substances. The local ...
Ocorrência de Pseudomerulius curtisii, Gelatoporia subvermispora e Sarcoporia polyspora no sul do Brasil
(Universidade Federal de Santa Maria, 2012-07-20)
The Pampa is the newest Brazilian biomes. It is one of the lest studied and the one of the most economically exploited. Among these forms of exploitation, there is the cultivation of great dominated grassy fields with ...