ARC-Onderstepoort Veterinary Research2019-10-302019-10-301957PE36NT54http://hdl.handle.net/2263/72041Scanned image of a photographic glass-plate negativeMr. J. W. Groenewald, dairy officer and Onderstepoort staff member at the Division of Veterinary Services and Animal Industry from 1931-1957. He wrote numerous articles on animal nutrition. His research was about the 'low' phosphorus content of South African soils and the methods by which this condition may be remedied, to the benefit of the live stock industry.1 photo : black and whitePDFOriginal medium: Glass-plate negative©2019 ARC- Onderstepoort Veterinary Research (Original) , University of Pretoria (Digital). Provided for educational purposes only. It may not be downloaded, reproduced or distributed in any format without written permission of the original copyright holder. Any attempt to circumvent the access controls placed on this file is a violation of copyright laws and is subject to criminal prosecution. Please contact the collection administrator for copyright issues.Veterinary scienceGlass negativeAnimal nutritionPhosphorusLivestock -- FeedingVeterinary medicine -- HistoryVeterinary medicine -- South AfricaVeterinary medicine -- PhotographsStill Image