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Atributos químicos após dezenove aplicações de dejeto líquido de suínos em argissolo sob plantio direto
(Universidade Federal de Santa Maria, 2010-09-27)
The use of pig slurry as a source of nutrients can affect the conditions of acidity and nutrient availability, altering the environment for crop development. The objective of this study was to evaluate changes in chemical ...
Sistemas de cultivo para a cultura de melancia
(Universidade Federal de Santa Maria, 2010-07-15)
Aiming to evaluate the watermelon crop (Citrullus lanatus L.) in different management systems, on an Ultisol in the Central Depression of RS, Brazil, an experiment was carried out during the agricultural year 2008/2009 ...
Relações físico-hídricas de um latossolo sob plantio direto
(Universidade Federal de Santa Maria, 2010-11-19)
Soil compaction is a process inherent in the no-tillage system and therefore, it will be always observed with varying intensity degrees. However, this system has features which can be maximized in order to reduce the ...
Composição bioquímica e decomposição da parte aérea e raízes de culturas comerciais e plantas de cobertura de solo
(Universidade Federal de Santa Maria, 2010-02-26)
Crop residues (CR) composed by shoots and roots of plants are the main source of C for the agricultural soils. During the decomposition of these CR in the soil, part of C is evolved as CO2 and nutrients are mineralized, ...
Implicações do uso do solo nas propriedades físicohídricas e mecânicas de um argissolo vermelhoamarelo e de um gleissolo háplico
(Universidade Federal de Santa Maria, 2010-07-23)
The Central Depression is an area with sedimentary rocks, presenting a large variety of soils. In highlands Alfisols are found, whereas in lowlands Planosols and Endoaqualf. The morphological, physical and chemical ...
Caracterização pedológica, uso da terra e modelagem da perda de solo em áreas de encosta do rebordo do planalto do RS
(Universidade Federal de Santa Maria, 2010-02-25)
The river catchment Vacacaí Mirim is located where the water reservoir that supplies part of the water needs of the city of Santa Maria is located in a hillslope area of
plateau border Southern Rio Grande. In these hillslope ...
Temperatura e umidade de um solo franco arenoso cultivado com milho
(Universidade Federal de Santa Maria, 2010-03-01)
Water is a key factor for crop yields, and causes major fluctuations in productivity, especially for maize cultivated in southern Brazil. Mulching the soil surface, temperature and soil moisture are factors closely linked ...
Influência dos resíduos vegetais na superfície do solo na dinâmica de evaporação da água e temperatura do solo
(Universidade Federal de Santa Maria, 2010-05-21)
The availability and proper management of water represent fundamental aspects of the development of sustainable agricultural production systems, since it has direct impact on crop productivity. Maintaining crop residues ...
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 ...
Impacto de agroquímicos usados na lavoura de arroz irrigado sobre a qualidade da água de irrigação e na comunidade zooplanctônica
(Universidade Federal de Santa Maria, 2010-02-26)
Agrochemicals are intensely used on rice (Orysa sativa L.) paddy culture, and depending on their environmental persistence and toxicity they may contaminate water bodies and affect non-target organisms. Both herbicides and ...