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Absorção de nitrogênio pelo algodoeiro herbáceo em dois sistemas de cultivo
(2013-01-01)
The study of nutrient uptake is of fundamental importance to plant nutrition, as well as tell the time (growth stage) being absorbed by the culture, also signals to the levels of fertilizer to be used. Aiming to establish ...
An alternative methodology for the extraction of humic substances from organic soils
(1998-12-01)
The present study reports on an alternative methodology for the extraction of Humic Substances (HS) from the soil. The extractions were carried out with 0.5 M KOH for 3 h, at a ratio of 1:20 (m/v) under a nitrogen atmosphere. ...
Construção de amostrador passivo de baixo custo para determinação de dióxido de nitrogênio
(Sociedade Brasileira de Química, 2006-04-01)
A new passive sampling system for monitoring NO2 in air has been developed to measure gas concentrations in indoor and outdoor air. The sampler is inexpensive, and easy to construct and operate. Nitrogen dioxide forms a ...
Construção de amostrador passivo de baixo custo para determinação de dióxido de nitrogênio
(Sociedade Brasileira de Química, 2006-04-01)
A new passive sampling system for monitoring NO2 in air has been developed to measure gas concentrations in indoor and outdoor air. The sampler is inexpensive, and easy to construct and operate. Nitrogen dioxide forms a ...
Mild and Moderate Extraction Methods to Assess Potentially Available Soil Organic Nitrogen
(Soc Brasileira De Ciencia Do Solo, 2016-01-01)
The use of chemical methods to assess the soil organic nitrogen (N) potentially available to plants is not a common practice in Brazil. However, associated with others, this tool might improve efficiency in the use of waste ...
Temporal organic matter content variation on of two volcanic soils under different agricultural managementsVariación temporal del contenido de materia orgánica en dos suelos volcánicos bajo diferentes manejos agrícolas
(Facultad de Ciencias Agrarias. Universidad Austral de Chile, 2014)
Organic and inorganic P forms in soil as affected by cover crops and nitrogen fertilization
(Empresa Brasil Pesq Agropec, 2016-11-01)
The objective of this work was to evaluate the effects on organic and inorganic forms of soil phosphorus of the cultivation of cover crops and the use of nitrogen levels in soil under notillage system. The experiment was ...
Effects on chlorophyll and carotenoid contents in different grape varieties (Vitis vinifera L.) after nitrogen and elicitor foliar applications to the vineyard
(Comité editorial Food Chemistry, 2020)
Sample Preparation Assisted By Electric Fields: Fundamentals, Advances, Applications, And Trends
(SOC BRASILEIRA QUIMICASAO PAULO, 2015)
Elimination of iron interference in the molecular spectrophotometric determination of aluminum in soil extracts using artificial neural networks
(Japan Soc Analytical ChemistryTokyoJapão, 2008)