ISO INTERNATIONAL STANDARD 18644 First edition 2016-04-15 Fertilizers and soil conditioners Controlled-release fertilizer - General requirements Matieres fertilisantes -Engrais a libération controlée Exigences générales Reference number IS0 18644:2016(E) ISO International Organization for Standardization e=ZHEJIANG INST OF STANDARDIZATION C1 5956617 @IS02016 vided by IHS under I No reproduction or networking permitted without license from IHS IS0 18644:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Internatinair PrganizationforStandardization ensee-ZHEJIANG INST OF STANDARDIzARoISQ16- All rights reserved etworking permitted without license from IHS IS0 18644:2016(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Terms and definitions 4 Classification 5 Requirements 6 Testing method. ..3 7 Sampling and preparation of test sample 8 Marking and labelling. .5 9 Package, transport, and storage ..5 Bibliography .6 Inteatinal oganzation @st(Sr201.6 - All rights reserved iii ee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS underI se with ISi ed without license from IHS Not for Resale, 2016/7/20 02:57:54