[Development of the organic matter in the soil: its study using natural carbon 14].
D002247:Carbon Isotopes; D002625:Chemistry, Organic; D006812:Humic Substances / Q000032:analysis*; D055601:Organic Chemistry Phenomena; D012987:Soil / Q000032:analysis*
D002247:Carbon Isotopes; D006812:Humic Substances; D012987:Soil
Evolución de la materia orgánica del suelo: su estudio con carbono 14 natural.