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Nitrogen and Potassium Fertilization in a Guava Orchard Evaluated for Five Cycles: Effects on the Plant and on Production Rev. Bras. Ciênc. Solo
Montes,Rafael Marangoni; Parent,Léon Étienne; Amorim,Daniel Angelucci de; Rozane,Danilo Eduardo; Parent,Sergie-Étienne; Natale,William; Modesto,Viviane Cristina.
ABSTRACT Guava response to fertilization can be monitored through plant tissue analysis. Correct interpretation of these results, based on standard levels, is of great importance for correct nutrient management of the crop. However, standard levels are constantly criticized for not considering interactions among elements. To improve the nutritional diagnosis of ‘Paluma’ guava (Psidium guajava L., Myrtaceae), an experiment was conducted using nitrogen fertilization (0, 0.5, 1.0, and 2.0 kg per plant per cycle of N, with urea as a source with 45 % N), and potassium fertilization (0, 0.55, 1.1, and 2.2 kg per plant per cycle of K2O, with potassium chloride as a source with 60 % K2O) in an irrigated commercial area for five consecutive cycles, 2009 through...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Isometric log ratio (ilr); Mineral nutrition; Nutrient balance; Compositional analysis.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100534
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Selection of habitat by the jaguar, Panthera onca (Carnivora: Felidae), in the upper Paraná River, Brazil Rev. Bras. Zool.
Cullen Junior,Laury; Sana,Dênis A.; Lima,Fernando; Abreu,Kauê C. de; Uezu,Alexandre.
We used data from VHF and GPS radio-tagged jaguars, Panthera onca (Linnaeus, 1758) to quantify jaguar habitat selection and how adult individuals in the Upper Paraná River region selected among the available habitat types. We followed the framework in which animals make decisions about resource use at hierarchical stages, namely selection of home range within a study area (second-order selection) and selection of patches within a home range (third-order selection). We quantified habitat preferences at two orders of selection with respect to habitat types and to test the null hypothesis that habitat utilization by jaguars was random at both study sites. Using compositional analysis, we assessed habitat selection by jaguars at second- and third-orders of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Habitat preference; GPS and VHF telemetry; Compositional analysis; Large predator; Neotropical felid guild.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000400003
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