ISO INTERNATIONAL STANDARD 14238 Second edition 2012-08-01 Soil quality Biological methods Determination of nitrogen mineralization and nitrification in soils and the influence of chemicals on these processes Qualité du sol Méthodes biologiques - Détermination de la minéralisation de I'azote et de la nitrification dans les sols, et de I'influence des produits chimiques surces processus Reference number ISO 14238:2012(E) ISO @ISO2012 HS under I n or networking permitted without license from IHS Not for Resale ISO 14238:2012(E) COPYRiGHTPROTECTEDDOCUMENT ISO2012 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 either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 · CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ ISO 2012 - All rights reserved No reproduction or networking permited without license from IHS Not for Resale ISO 14238:2012(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies technical committees. Each member body interested in a subject for which a technical committee has been Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the IsO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adoptedbythetechnical committeesarecirculatedtothememberbodiesforvoting.Publicationasan International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. This second edition cancels and replaces the first edition (IsO 14238:1997), which has been technically revised. @ ISO 2012 -All rights reserved Not for Resale