ISO 11721-2:2003描述了一种试验程序，用于鉴定耐腐整理剂对土壤中微生物攻击的长期耐受性。 为了评估在热带地区使用的适用性，它允许区分无长期耐腐性、常规长期耐腐性和增加的长期耐腐性饰面。 由于土壤埋藏试验是一个生物过程，且试验土壤未准确定义，ISO 11721- 2:2003仅涵盖完工和未完工试样的比较。

ISO 11721-2:2003 describes a test procedure for identification of the long-term resistance of a rot-retardant finish against the attack of microorganisms in the soil. It permits a distinction to be made between rot-retardant finishes with no long-term resistance, with regular long-term resistance and with increased long-term resistance, in order to assess the suitability for use in the tropics. As the soil burial test is a biological process and the test soil not accurately defined, ISO 11721-2:2003 only covers the comparison of finished and unfinished specimens.