6822-84 485190300508940 C-89-15 International Standard (ISo 6822 INTERNATIONALORGANIZATION FOR STANDARDIZATION+MEKAYHAPOAHAA OPTAHW3ALMA O CTAHAAPTW3ALIWWORGANISATION INTERNATIONALE DE NORMALISATION Potatoes, root vegetables and round-headed cabbages Guide to storage in silos using forced ventilation Pommes de terre, legumes a racines et choux pommes Guidepourl'entreposageensilos.équipésd'uneventilationforcee Firstedition-1984-05-15 ISO 6822-1984 (E) UDC635.1/.34:664.8.032 Ref.No.ISO6822-1984(E) Descriptors : agricultural products, vegetables, potatoes, cabbages, storage, silos, specifications, Price based on 4 pages -2 48519030050895 Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (Iso member bodies). The work of developing International Standards is carried out through Iso technical committees. Every member body interested in a subject for which a technical committee has been authorized 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. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by theIso Council. International Standard iSO 6822 was developed by Technical Committee ISO/TC 34, Agricultural food products, and was circulated to the member bodies in June 1982. It has been approved by the member bodies of the following countries : Australia traq Romania Austria Israel South Africa, Rep. of Czechoslovakia Kenya Spain Egypt, Arab Rep. of Korea, Rep.of Sri Lanka Ethiopia Malaysia Tanzania Hungary Netherlands Turkey India Philippines USSR tran Portugal Yugoslavia The member bodies of the following countries expressed disapproval of the document on technical grounds : New Zealand USA InternationalOrganizationforStandardization,1984 Printed in Switzerland 6822-84 4851903 0050896 INTERNATIONALSTANDARD ISO6822-1984 (E) Potatoes, root vegetables and round-headed cabbages Guide to storage in silos using forced ventilation 0 Introduction 3 Preparation of the site and construction of silos The method described in this International Standard relies on the most recent procedures for the storage of potatoes, root 3.1 Choose a flat site, with minimum slope and an vegetables and round-headed cabbages in silos, having as its underground water bed of depth at least 1,5 to 2m, close to objective a reduction of losses of the products and a reduction accessible transport routes and an electricity supply. of the manual labour required for the technological processes Depending on the level of underground water, the silo can be placed on the surface of the site or partially underground. Scopeandfield ofapplication This International Standard specifies a method of storing 3.2 The storage sites supplied by permanent transport routes potatoes, root vegetables and round-headed cabbages in silos andwithafixed coveringconsistingofaframetobefilledup using forced ventilation. may be used for 5 to 10 seasons or more, or they may be provi sional for a single season. The method is applicable to potatoes and vegetables (root vegetables, round-headed cabbages) intended for different 3.3 A pit of depth 0,3 m shall be prepared at the base of the purposes : for human consumption, for seeds and for fodder. It silo, the ventilation of which is effected by distribution chan- providesfortheuseofasystemofventilationusingoutsideair nels. The pit shall be covered by a wooden trellis on which the forregulationofthestorageconditionsoftheproducts. products can be stored. The method is particularly efficient in regions having moderate climates,where the average temperature during harvest is from 3.4The dimensions of silos vary from one region to another, Oto+2°C,orlower during the night. their widths being from 3 to 5 m, their heights from 1,3 to 2 m, and their lengths from 15