ISO INTERNATIONAL STANDARD 5311 Third edition 1992-07-01 Asl Irternat Doc Sec Fertilizers -- Determination of bulk density (tapped) Engrais -- Determination de la masse volumique apres tassement Referencenumber ISO 5311:1992(E) Copyright International Organization for Standardization No reproduction or networking pemited without license from IHS Not for Resale ISO 5311:1992(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (Iso member bodies). The work of preparing Internationai Standards is normally carried out through iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with iso, also take part in the work.Iso coliaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Inter- bodies castingavote. International Standard IsO 5311 was prepared by Technical Committee IsO/TC 134, Fertilizers and soil conditioners, Sub-Committee sC 3, Physical properties. Thisthird edition cancelsand replacesthe second edition (Iso 5311:1983), which has been technically revised. ?ISO1992 All rights reserved.No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, inciuding photocopying and microfilm, without permission in writing from the publisher. International OrganizationforStandardization CasePostale56·CH-1211Geneve20·Switzerland Printed in Switzerland ii Copyright Internaltional Organization for Standardizatior No reproduction or networking permited without license from IHS Not for Resale ISO5311:1992(E) Introduction The bulk densities (loose and tapped) of a fertilizer provide information relative to the required size of packaging materials, store-houses, stock-rooms, etc. Generally, the bulk density (tapped) is up to 10 % greater than the bulk density (loose), and sometimes it may exceed this value. Both bulk densities depend on the actual density, surface form and particle size of the fertilizers. The bulk density (loose) can be used to calculate the maximum volume of a given weight of fertilizer which may be expected in practice. The within the range caiculated from the bulk density (loose) and the bulk density (tapped). ili Copyright International Organization for Standardization No reproduction or networking permited without license from IHS Not for Resale