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An index of the risk of soil acidification based only on soil characteristics and current land use has been calculated using the following indicators. 1. Lime requirements (LR, 5 classes) – calculated using the current pH and buffering capacity (see Figure 2.4). 2. The likely NAAR – estimated using the classes defined by the provisional NAAR ranking (see Table 2.3) and mapped using the Australian Land Use and Management Classification (Table 2.4) (5 classes ) (see Figure 2.5) This spatial layer is the result of combining thesetwo indices according to Table 2.4.Soil acidification is likely to be a problem in areas with a high risk ranking. This is useful for framing priorities for interventions but the map provides no information on the effectiveness of current land management. This important consideration is much harder to determine. Risk of Acidification values: 1 = Low, 2 = Medium, 3 = High risk |