48519030667453 546 INTERNATIONAL ISO STANDARD 6322-1 Second edition 1996-11-01 Storage of cereals and pulses - Part 1: General recommendations for the keeping of cereals Stockage des ceréales et des légumineuses -- Partie 1: Recommandations generales pour la conservation des céréales Organization for Standardization (Iso) Copyright License number IHS/ICC/1996. Not for resale. No part of these Iso documents may be reproduced inanyform,electronicretrieval systemorotherwise,except as allowed in the copyright law of the country of use, or with the prior written consent of Iso (Case postale 56, 1211 Geneva 20, Switzerland, Fax +41 22 734 10 79), IHS or the ISO Licensor's members. ISO Reference number ISO 6322-1:1996(E) Copyright International Organization for Standardization ed without license from IHS Not for Resale 4851903 0667454 482 ISO 6322-1:1996(E) Foreword IsO (the International Organization for Standardization) is a worldwide fed- eration of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through IsO technicalcommittees.Eachmemberbodyinterestedina subjectfor which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (lEC) 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 International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 6322-1 was prepared by Technical Committee ISO/TC 34, Agricultural food products, Subcommittee SC 4, Cereals and putses. This second edition cancels and replaces the first edition (ISO 6322:1981). which has been technically revised. ISO 6322 consists of the following parts, under the general title Storage of cereals and pulses: Part 1: General recommendations for the keeping of cereals Part 2: Essential requirements Part 3: Control of attack by pests Annexes A and B of this part of ISO 6322 are for information only. @ISO1996 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical., including photocopying and microfilm, without permission in writing from the publisher. International OrganizationforStandardization Case Postale 56 . CH-1211 Geneve 20 · Switzerland Printed in Switzerland Copyright Intermational Organization for Standardization by IHS unc cense from IHS Not for Resale 4851903 0667455319 @ISO ISO 6322-1:1996(E) Introduction The seasonal nature of cereal production, in conjunction with year-round consumer requirements, has always made it necessary to store grain for short or long periods. However, the caryopsis of cereals, like all plant life with a reduced metabolic rate, undergoes an unavoidable physiological development which can have beneficial effects (breaking of dormancy, improved baking quality, quality for making pasta, cooking quality), but which leads to ageing and, after a time, to changes which are detrimental and of a nature andintensitywhicharedependentuponthestorageenvironment. When considered on a worldwide scale, these various changes result in very substantial qualitative and quantitative losses. Storage losses have been estimated as being an average of 5 % but sometimes as much as 30 %, especially in countries with climates favourable to the rapid development of agents of deterioration and where storage techniques are poorly developed, such as developing countries in the damp tropics. The principal causes of loss of quantity and quality are metabolic changes in the grain and the attacks of microorganisms (bacteriaandmoulds)andofvertebrateand invertebrateanimals. The magnitude of