Agronomy

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Submitted By psanches
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FUNDAMENTOS DE LEVANTAMENTOS PEDOLÓGICOS: OBJETIVOS, UTILIDADES, UNIDADES BÁSICAS DE REFERÊNCIA, DEFINIÇÕES E CRITÉRIOS ESSENCIAIS
LEVANTAMENTO PEDOLÓGICO
- Um prognóstico da distribuição geográfica dos solos como corpos naturais.
-Identifica solos que passam a ser conhecidos como unidades naturais, prevê e delineia suas áreas nos mapas, em termos de classes definidas de solos.
-Identifica e separa unidades de mapeamento.
-É constituído, na sua forma final, por um mapa e um texto explicativo. - O mapa mostra a distribuição espacial de características dos solos e a composição de unidades de mapeamento em termos de unidades taxonômicas.

OBJETIVOS
Subdividir áreas heterogêneas em parcelas mais homogêneas, que apresentem menor variabilidade possível, em função dos parâmetros de classificação e das características utilizadas para a distinção de solos.

UTILIDADES
Cada unidade de mapeamento delineada num mapa de solos possui um conjunto de propriedades inter-relacionadas que lhe são próprias.
Em países desenvolvidos, os levantamentos de solos são executados para atendimento de projetos, envolvendo:
*O uso agrícola e não agrícola;
*Conservação e recuperação dos solos;
*Decisões localizadas em construção civil, expansão urbana, irrigação, drenagem, taxação de impostos, previsão de safras;
*Planejamento de uso racional do solo em nível de propriedades.

UNIDADES BÁSICAS DE REFERÊNCIA
Em taxonomia de solos, o indivíduo solo não é perfeitamente distinto é uma entidade imaginária, criada artificialmente por conveniência (KNOX, 1965).
Entre as unidades de referência de maior relevância para levantamento de solos estão o perfil, o pedon e o polipedon.

PEDON
O pedon é uma unidade básica de referência, tridimensional, com limites e dimensões arbitrárias, cuja área é determinada pela variabilidade lateral das características utilizadas em taxonomia de…...

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