Long story short:

• 1930's: first soil surveys
• 1970's and 1980's: official national soil survey program (Radam Brasil)
• 2010's: 9000 soil observations in the Brazilian Soil Information System (BDSolos)

In comparison (Arrouays et al. 2017):

• Australia: 290 000
• France: 64 123
• Mexico: 22 430