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Valladares,Gustavo Souza; Pereira,Marcos Gervasio; Benites,Vinícius de Melo; Anjos,Lúcia Helena Cunha dos; Ebeling,Adierson Gilvani; Guareschi,Roni Fernandes. |
ABSTRACT Despite limited geographic expression of Organosols in Brazil, their high carbon storage capacity and natural environmental vulnerability justifies further studies on C and N stocks in these soils and their relationship to the nature of organic matter. Evaluation of physical and chemical properties of organic soils and their ability to store C is important so as to develop sustainable management practices for their preservation. The objectives of the study were to measure the total organic carbon stock (OCst), total nitrogen stock (Nst), and humic fractions in Organosols from different environments and regions of Brazil, and to correlate the data with soil chemical (pH, P, K, Ca2+, Mg2+, Al3+, H+Al, CEC, V) and physical properties (soil bulk... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil organic matter; Humic substances; Histic horizon; Physical and chemical properties. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100425 |
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El-Dahshouri, Mohamad Farouk. |
Pear trees cv. Le Conte (Pyrus communis, L.) budded on Pyrus communis rootstock, uniform in vigor, thirteen years old, grown in sandy soil spaced at 4x4 m, under drip irrigation system in a private orchard located at El-Tall El-Kepeer, Ismailia Governorate, Egypt. Trees were foliar sprayed by five mineral iron concentrations (0.0, 250, 500, 1000 and 2000 ppm) as ferrous sulphate (FeSO4.7H2O) form at two times (Mid May and June) during successive seasons 2014 and 2015. This study was conducted with the aim to examine the response of leaf chlorophyll content, active iron, nutrient status, yield components quantity and quality of Le Conte pear trees to foliar feeding of iron concentrations as well as to evaluation the current status of foliar fertilization... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dr; Plant Nutrition Pear; Fruit yield quantity and quality; Iron foliar Spray; Physical and chemical properties; Nutritional status. |
Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4512 |
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Guerra,Marisa Josefina; Mujica,María Virginia. |
"Panela" is a natural sweetener obtained by concentrating sugar cane juice and handmade in small factories. In the study carried out, the physical and chemical properties of two commercial brands of artisanal granulated panelas and of one made on an experimental level were determined. Three lots of each sample were analyzed. The parameters measured were moisture, a w, protein, ash, minerals, reducing sugars, sucrose, pH, color (L, a and b), insoluble solids (IS), transmittance a 720 nm and filterability. In addition, a qualitative test to detect sulphur dioxide was performed. The parameters with higher variability were moisture (1.66-4.36 g.100 g-1), a w (0.51-0.69), reducing sugars (4.58-11.48 g.100 g-1), pH (5.58-6.90), and color. Potassium was the most... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sweetener; Sugar cane; Artisanal; Minerals; Reducing sugars; Insoluble solids; Panelas; Physical and chemical properties. |
Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612010000100037 |
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