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Development of a validity test for survey data on milk-from-grass from German dairy farms

Questionnaires are a frequently used instrument to analyse the productivity of farms. As surveys might include wrong or incorrect data, there is a need for validity testing.

Author: 
Becker T.H., Blume L., Kayser M. and Isselstein J.
Session: 
Session 1. High output dairy farming systems
Producttype: 
Paper
ISBN: 
978-9090-289-61-8