https://doi.org/10.3897/BDJ.7.e36387 (27 Sep 2019)
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The present dataset summarises management information collected from 2006 to 2016 for 150 grassland plots in three different regions of Germany. Data are based on annual interviews of the respective farmers, land owners or tenants involved in land management activity, using a standardised questionnaire.
Standardisation of missing values:
“NA” - if not known,
“0” if something was counted but was zero (e.g. no mowing or no cows or no maintenance). Some dates of maintenance or fertilisation are set to "0". For example, in case maintenance measurements were applied on that plot during the year but not the specific one, i.e. mulching was applied and is listed with specific mulching date, but no levelling took place, therefore the levelling date is set to "0" instead of "-1" when generally no maintenance measures were carried out on that plot within the year.
“-1” if not possible, for example, if no mowing a “-1” has been given for the question about mowing machine.