2013
DOI: 10.1590/s0100-06832013000400027
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Variabilidade espacial de atributos físicos em um cambissolo háplico, sob diferentes usos na região sul do Amazonas

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Cited by 42 publications
(45 citation statements)
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“…The range is another important parameter in the study of the semivariogram, because it corresponds to a maximum distance (influence zone) in which a variable is spatially correlated, meaning that, the model establishes a maximum distance to where the value of a variable demonstrates spatial dependence with its neighbors Oliveira et al, 2013). Therefore, analyses done at higher distances than the established range will have random distribution and, because of that, they are independent between themselves.…”
Section: Resultsmentioning
confidence: 99%
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“…The range is another important parameter in the study of the semivariogram, because it corresponds to a maximum distance (influence zone) in which a variable is spatially correlated, meaning that, the model establishes a maximum distance to where the value of a variable demonstrates spatial dependence with its neighbors Oliveira et al, 2013). Therefore, analyses done at higher distances than the established range will have random distribution and, because of that, they are independent between themselves.…”
Section: Resultsmentioning
confidence: 99%
“…Detailed knowledge of variability in soil variables could provide a solid basis for making sound decisions with respect to choosing adequate management schemes . In managed systems, such as those of Brazil nut harvesting areas, there could be additional sources of soil heterogeneity besides those inherently natural (Camargo et al, 2010), and therefore quantifying soil spatial variation would permit better control over factors that control production and also over environmental monitoring (Silva Neto et al, 2012;Oliveira et al, 2013). According to Souza et al (2009), the use of geostatistiscal techniques allows for interpretation of results using as a base the natural variability inherent in the system.…”
Section: Introductionmentioning
confidence: 99%
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“…Os atributos físicos do solo avaliados se comportaram como atributos mais homogêneos em relação ao CV (Warrick & Nielsen, 1980); ainda assim se notou maior CV para os atributos relacionados à agregação do solo (DMG e DMP) quando estes não foram submetidos a um pré-umedecimento concordando com os resultados encontrados por Oliveira et al (2013) em um Cambissolo Háplico sob agrofloresta. O pré-umedecimento simula a presença contínua de água nos poros das partículas de solo agindo como a ocorrência de uma precipitação; já a avaliação das amostras do solo sem pré-umedecimento simula o oposto, isto é, condiz com um solo completamente seco em que, quando ocorre uma precipitação que há muito não ocorria, o solo facilmente desagrega podendo causar erosão hídrica.…”
Section: Resultsunclassified
“…No entanto, Oliveira et al (2013) no sul do estado do Amazonas verificaram que os atributos físicos do solo possuem dependência espacial e que a variabilidade observada nos solos sob diferentes usos podem ser alterados em função do manejo adotado. É sabido que o sucesso da agricultura consiste no bom manejo do solo, entretanto, sua qualidade é totalmente dependente da amostragem do solo.…”
Section: Introductionunclassified