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| Oliveira,Rone B. de; Lima,Julião S. de S.; Xavier,Alexandre C.; Passos,Renato R.; Silva,Samuel de A.; Silva,Alessandra F. da. |
| O objetivo deste trabalho foi comparar a metodologia convencional de amostragem de solo com a análise espacial para a recomendação de calagem e adubação de nitrogênio, fósforo e potássio em solo cultivado com café conilon. O experimento foi realizado nas safras de 2004/2005 e 2005/2006, em área de 1,0 ha, com as amostras retiradas na profundidade de 0-0,20 m. No método convencional, coletaram-se 15 subamostras em caminhamento ziguezague, constituindo uma amostra composta, e, no método espacial, construiu-se uma malha amostral de 109 pontos georreferenciados. Com os resultados das análises, foi calculada a necessidade de calagem e adubação em função do teor do elemento no solo e da produtividade esperada das plantas. Os dados foram analisados por meio da... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Geoestatística; Geoprocessamento; Manejo do solo. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162008000100018 |
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| Medauar,Caique C.; Galvão,Ícaro M.; Carvalho,Luis C. C.; Silva,Samuel de A.. |
| ABSTRACT The objective of this study was to evaluate the spatial-temporal variability of leaf chlorophyll index and its relationship with cocoa yield. The experiment was carried out in an experimental area of cocoa production located in Ilhéus, Bahia State, Brazil. Leaf chlorophyll content was measured in September, October, January, February, March and April in the 2014/2015 season, at each sampling point of a regular grid by using a portable chlorophyll meter. Under the same conditions, yield was evaluated and the data were submitted to descriptive statistics and a linear correlation study. Geostatistical analysis was used to determine and quantify the spatial and temporal variability of leaf chlorophyll index and yield. Leaf chlorophyll index varied... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Theobroma cacao; Geostatistics; Thematic maps. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000300164 |
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| Almeida,Samira L. H. de; Silva,Samuel de A.; Lima,Julião S. de S.; Rosas,Jorge T. F.; Capelini,Vinicius A.. |
| ABSTRACT This work aimed to determine potential areas for the establishment of cocoa moniliasis in Bahia state, Brazil, by means of fuzzy logic, based on historical datasets of temperature and air relative humidity, available for 519 measurement points distributed throughout the state of Bahia. The data were initially submitted to a descriptive statistical analysis. The spatial variability was determined through geostatistical analysis, followed by interpolation to map the spatial-temporal structure dependence of the phenomenon. Simulations of continuous pixel-to-pixel classification of variables were performed using fuzzy mapping to model the climatic risk of disease establishment. The exponential fuzzy model was applied to temperature data, while the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Moniliophthora roreri; Theobroma cacao; Climate change; Geostatistics; Precision phytopathology. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000400225 |
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