Column	Description
LTE	The SLU code for the experimental series
ID	The SLU code for the specific experimental site
location	The name of the location of the experimental site 
plotID	Denotes the specific plot (parcell) number. X is used when data was collected from a composite sample from all plots with the same treatment.
treatment_code	Denotes treatment code, the combination of factors for the plot
straw_management	Denotes if straw is kept in the field or removed 
N_added	Denotes four levels of yearly N addition
component	The component that has been analysed or observed
year	The year the sample or observation was taken
crop	The crop grown during the growing season  
variable	The measured variable
value	The value of the variable
unit	The unit for the measured variable