==== Crop samples, soil samples, and measured properties (field or laboratory) through wet properties ==== Metadata elements for documenting crop samples, soil samples, and measured properties either in the field or laboratory through wet chemistry. Source: OGC Abstract Specification Topic 20: Observations, measurements, and samples ^ Metadata element ^ Description ^ Example ^ | Unique identifier | Unique metadata identifier: e.g. UUID (Universally Unique Identifier) | 123e4567-e89b-12d3-a456-426614174000 | | sampledFeature | Material sample: e.g. soil, leaf sample, stem sample, grain sample | Soil samples for the field cultivated with rice | | sourceLocation | Where the sample was collected | Jolanda Di Savoia, Ferrara; XY coordinates (Coordinates UTM-EPSG:32632) | | storageLocation | Where the sample is stored | University of Milano Bicocca | | samplingTime | When the sample was collected | April 2023 | | size | Sample size (e.g. weight in g) | | | SamplingProcedure | How the samples was collected or prepared | The samples have been collected from 10 Elementary Sampling Units (ESU) (10 ESU in total) and in each ESU, there are 4 plots each of 15*15 m.
For each plot, 5 soil samples were collected with a core cotter. These 5 samples were mixed together forming a unique soil sample per plot. Collected soil samples belonged to the top layer of the surface (15-20 cm) | | Procedure | The analysis method: e.g. ICP-EOS instrument | extraction with barium chloride or ammonium acetate solution and determination by atomic absorption spectroscopy-FAAS | | observedProperty | The analysed property (e.g. generally concentration of a constituent) | Ca2+ | | result | The result of the analysis | Measured values | | unit of measurement | reference quantity chosen from a unit equivalence group | cmol(+) kg-1 | | resultTime | Analysis date | 15.03.2024 |