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{'无论是土壤分析,化肥分析还是水质分析,都要经过布点、采样、样品制备和保存、化验室分析、数据处理等许多环节,最终报出的分析数据才能具有代表性,准确性。': [0], '一、采样': [1], '1、避免土壤的不均一。实践证明,一般情况下,采样误差要比分析误差大得多。': [2], '2、选择有代表性的土壤,在采样前要进行现场勘察和有关资料的收集。': [3], '3、划分出采样单元,按单元采样,利于缩小误差。': [4], '4、有足够的样点,采样要保证有足够多的采样点,并使之能代表采样单元的土壤特性。': [5], '5、不同的土样,采取不同的采样方法。': [6], '6、采取土样要注意时间因素,同一时间内采取的土样分析结果才能相互比较。': [7], '二、样品的制备和保存': [8], '1、应剔除土壤以外的侵入体和新生体,以除去非土样的组成部分。': [9], '2、适当磨细,充分混匀,使分析时所称取的少量样品具有较高的代表性,以减少称样误差,特别是全量分析项目,样品需要磨细,从而使分析样品的反应能够完全和匀致。': [10]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W2254330346', 'counts_by_year': [], 'updated_date': '2024-09-16T13:29:32.912571', 'created_date': '2016-06-24'}