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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 ...
Aplicação superficial de calcário: até onde migram e até quando persistem os efeitos no perfil do solo?
(Universidade Federal de Santa Maria, 2014-08-04)
Soil acidity is a major limiting factor in crop production. The low solubility of lime is a critical
limitation which restricts its dissolution as well as neutralization of soil acidity in the vicinity of its
particles. ...
Metais pesados em solo e plantas em área com longo histórico de aplicações de fontes orgânicas e mineral de nutrientes
(Universidade Federal de Santa Maria, 2014-02-20)
The application of organic and mineral fertilizers in agricultural areas, especially, in no-till system
and over the years, can promote increased levels of heavy metals and as arsenic (As), cadmium
(Cd), lead (Pb), chromium ...
Residualidade e reaplicação de corretivo da acidez, associada ou não ao gesso, em Latossolo no Cerrado: alterações nos atributos químicos do solo no perfil e baixo impacto na produtividade da soja e do milho
(Universidade Federal de Santa Maria, 2021-01-29)
Soil reacidification is a slow process and starts from the surface. In soils under a no-tillage (NT) system the reacidification can be controlled by reapplying lime on the surface provided that the soil native potential ...
Qualidade física de um latossolo sob plantio direto submetido à escarificação de sítio específico e o rendimento da soja
(Universidade Federal de Santa Maria, 2010-02-26)
The soil compaction has been noted under no-till especially in clay soil texture. One important characteristic of soil compaction in cropland is non-uniform occurrence. With precision farming (PF) is possible determine ...
Estoque de carbono e nitrogênio em solo sob sistemas de manejo e culturas de inverno
(Universidade Federal de Santa Maria, 2015-03-11)
Soil organic matter (SOM) constitutes the largest reservoir of carbon (C) and nitrogen (N) of the earth's surface. In agricultural soils, the organic fraction is of great importance in maintaining soil quality, while ...
Estratificação dos teores de potássio no solo de lavouras sob sistema plantio direto
(Universidade Federal de Santa Maria, 2021-08-24)
Potassium (K) is an essential macronutrient and its application in agricultural soils is required
due to the high export rate by crops. Within this context, agricultural systems seek greater
operational yield from ...
Formas de alumínio em solo submetido a diferentes manejos e rotações de culturas
(Universidade Federal de Santa Maria, 2012-09-28)
The use of different tillage systems and winter crop plants over a long period of time on a clayed and naturally acid soil can promote changes in the forms of aluminum present in the soil, reducing the possibility of its ...