soil_mass_content_of_nitrogen
https://w3id.org/hacid/data/cs/variables/cf/soil_mass_content_of_nitrogen <https://w3id.org/hacid/onto/data/Variable>
"Content" indicates a quantity per unit area. The "soil content" of a quantity refers to the vertical integral from the surface down to the bottom of the soil model. For the content between specified levels in the soil, standard names including "content_of_soil_layer" are used.
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soil_mass_content_of_nitrogen