Definitions of standards for soil variables in the Free Brazilian Repository for Open Soil Data – http://www.ufsm.br/febr.
standards(soil.var = "fe", extraction.method)
Identification code of the soil variable. The only currently available option is
Identification code of the extraction method. See ‘Details’.
Standards for soil variables are defined according to the third edition of the Manual of Methods of Soil Analysis published by Embrapa Soils in 2011. They include the measurement units and number of digital places that should be used with a soil variable as defined by the extraction method.
Alessandro Samuel-Rosa [email protected]
Donagemma, G. K., Campos, D. V. B., Calderano, S. B., Teixeira, W. G. and Viana, J. H. M. (2011) Manual de Métodos de Análise de Solo. Rio de Janeiro: Embrapa Solos.
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