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Superfosfato simples contendo fosfato de ferro de baixa solubilidade aplicado em solos de várzea do Rio Grande do Sul
(Universidade Federal de Santa Maria, 2009-05-21)
Some rocks used in fertilizer production contain impurities of low solubility in water such as iron aluminum phosphate (Fe- Al- P). The use of these rocks
generates simple superphosphate which may contain impurity levels ...
Qualidade física de solos irrigados do Rio Grande do Sul e do Brasil central
(Universidade Federal de Santa Maria, 2005-02-28)
The irrigated áreas are caracterized by an intensification of the land use, and as consequence, an intense use of the soil. This usually results in a higher pressure of the soil structure degradation, causing many times ...
Efeito do calcário em atributos biológicos do solo
(Universidade Federal de Santa Maria, 2005-02-28)
The soil is a complex system composed by live organisms, organic matter, gases, water and minerals parts that interact. In this sense, the soil organisms, besides inhabitants, are part of its composition. In the soil, the ...
Recomendação de nitrogênio e potássio para trigo, milho e soja sob sistema plantio direto no Paraguai
(Universidade Federal de Santa Maria, 2005-08-08)
More than 50% of the cultivated areas in the Southern Brazil and more than 60% of the cultivable area in Paraguay adopted the no-tillage system. This system went through several improvements, but there are still doubts ...
Transição agroecológica em sistemas de produção de batata
(Universidade Federal de Santa Maria, 2005-08-29)
This work was done as an articulation program between technicians of EMATER-RS, UFSM and FEPAGRO-RS and small farmers of ASBAT. The research aimed to evaluate
management practices of the potato production in a systemic ...
Estimativa da disponibilidade de fósforo para a cultura do arroz irrigado em solos do RS
(Universidade Federal de Santa Maria, 2004-12-17)
The evaluation of the available phosphorus (P) is hindered in lowland soils flooded for the rice cultivation, since the alternation in the oxidation and reduction conditions determine modifications in the dynamics of this ...
Potencial de mineralização anaeróbica do nitrogênio em solos de várzea do Rio Grande do Sul
(Universidade Federal de Santa Maria, 2005-02-23)
The soil organic nitrogen is the main source of N to crops, which is released from soil organic matter (SOM) decomposition by microrganisms. The N fertilization is based
on SOM levels, however, the SOM decomposition and ...
Qualidade de águas superficiais e tratamento de águas residuárias por meio de zonas de raízes em propriedades de agricultores familiares
(Universidade Federal de Santa Maria, 2007-02-23)
The anthropic action has changed the water quality of rivers and its tributaries as well as the sheets. In rural areas, where there is the predominance of familiar agriculture linked to the agroindustry, this problem is ...
Compactação do solo e sua influência nas propriedades físicas do solo e crescimento e rendimento de culturas
(Universidade Federal de Santa Maria, 2005-02-28)
Sol compaction effects on soil and plants has been subject of several studies. However, several parameters are used to evaluate soil compaction like bulk density and soil penetration resistance, but these parameters are ...
Impacto do uso da terra nos atributos químicos e físicos de solos de rebordo do planalto - RS
(Universidade Federal de Santa Maria, 2008-02-29)
Changes in land use can take into soil chemical and physical quality degradation. In the hillside areas
of the Rio Grande do Sul State (RS) land degradation vulnerability is elevated, due to the combination
of a strong ...