attributes.tag: collection_date
attributes.value: 2017-04
attributes.tag: depth
attributes.value: 0-5cm
attributes.tag: elev
attributes.value: 561′
attributes.tag: env_broad_scale
attributes.value: Agricultural soil
attributes.tag: env_local_scale
attributes.value: Long-term experimental site
attributes.tag: env_medium
attributes.value: soil
attributes.tag: geo_loc_name
attributes.value: China: Jilin
attributes.tag: lat_lon
attributes.value: 43.19 N 124.14 E
attributes.tag: crop_rotation
attributes.value: Maize monocropping
attributes.tag: slope_gradient
attributes.value: Mollisols
attributes.tag: BioSampleModel
attributes.value: MIMS.me
attributes.tag: BioSampleModel
attributes.value: MIGS/MIMS/MIMARKS.soil