Densidade de amostragem e complexidade de área em levantamentos pedológicos executados no Brasil
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Data
2008-03
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Editor
João Batista Duarte
Resumo
This study aimed to contribute to the establishment of
norms and criteria for future soil surveys, assessing soil sampling
density data. Soil surveys from several environments in the
Brazilian territory were selected and carried out in accordance
with the National Soil Research Center (CNPS, Embrapa, Brazil)
protocols. Soil surveys were grouped as generalized, intermediate
and detailed levels. For the first one, thirteen exploratory surveys
developed by the Radambrasil Project, reaching the five main
Brazilian geographical areas, and one exploratory-recognition soil
survey carried out by Embrapa (SNLCS), published in a
1:1.000.000 mapping scale, were used. For the intermediate level,
selected soil surveys were divided in Group I and Group II, with
mapping scales of 1:100.000 (Group I), 1:65.000 and 1:50.000
(Group II). Detailed soil surveys were made in Central West
sites of the country, with mapping scales ranging from 1:10.000
to 1:4.000. The main results showed that on generalized,
intermediate and detailed survey levels, average densities were of
one sampling point (complete profile plus extra sample) per
146378 ha, 4448 ha and 29 ha, respectively. Sampling density
was closely related to landscape complexity (number of polygons
per area unit), but it was not correlated to area complexity (number
of polygons or spots per area unit) on the soil maps.
Descrição
Palavras-chave
Levantamento de solos, Densidade de amostragem, Complexidade de área, Soil survey, Sampling density, Landscape complexity
Citação
RIOS, Antonio José Wilman; KLIEMANN, Huberto José; OLIVEIRA, Virlei Álvaro de; JACOMINE, Paulo Klinger Tito. Densidade de amostragem e complexidade de área em levantamentos pedológicos executados no Brasil. Pesquisa Agropecuária Tropical, Goiânia, v. 38, n.1, p. 44-52, jan./mar. 2008. Disponível em: <https://www.revistas.ufg.br/pat/article/view/3614/3537>.