Rethman, N.F.G.2013-09-072005-10-112013-09-072002-09-012005-10-112005-10-10Truter WF, 2002, Use of waste products to enhance plant productivity on acidic and infertile substrates, MScAgric dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/28585 >H898/thhttp://hdl.handle.net/2263/28585Dissertation (MSc Agric (Pasture Science))--University of Pretoria, 2005.Please read the abstract in the section 00front of this document© 2002 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means,without the prior written permission of the University of Pretoria.Subsistance economy south africaFly ash fertilizersSewage sludge as fertilizerWaste products as fertilizerUCTDDissertationhttp://upetd.up.ac.za/thesis/available/etd-10102005-112148/