0187-5779

S0187-57792019000400391

10.28940/terra.v37i4.531

Mexico

Germany

00 12 2019

37 4 391 400

2006 136 136

609-20

2016 34 34

271-88

2012 189-190 189-190

116-23

2016 110 110

1692-8

2016 7 7

1293-302

FAO (Food and Agriculture Organization of the United Nations) 2017

FAO (Food and Agriculture Organization of the United Nations) 1996 70

FAO and ITPS (Food and Agriculture Organization of the United Nations and Intergovernmental Technical Panel on Soils) 2015

1981

355-9

2012 17 17

65-75

INEGI (Instituto Nacional de Estadística y Geografía) 2000

INEGI (Instituto Nacional de Estadística y Geografía) 2017

IUSS Working Group WRB 2015

2016 62 62

71-80

2013

2016 34 34

239-49

2011 2 2

5-17

2017 16 16

1-13

NOM-021-RECNAT-2000 (Norma Of icial Mexicana)

2002

2013

2017 265-284 265-284

SEMARNAT (Secretaría de Medio Ambiente y Recursos Naturales) 2000

2014 204 204

229-34

USDA-ARS (United States Department of Agriculture-Agriculture Research Service) 1997

USDA-NCR (United States Department of Agriculture-National Capital Region) 1999

2014 74 74

1649-66

2015 528 528

408-18

2018 325 325

18‑27

2005 14 14

655-8

1978

1999 17 17

10-5