BS ISO 20981:2020 pdf free.Asparagus - - Specification and test methods. BS ISO 20981 1 Scope This document specifies requirements and test methods for fresh asparagus shoots of commercial varieties of asparagus grown from Asparagus officinalis L., of the Liliaceae family, offered to consumers after preparation and packaging.This document is applicable to all asparagus except green and violet/green asparagus with...