Table 2.1.1 Resource status and trends summary for soil acidity Ag Soil Ag Soil Summary Condition Trend Confidence in condition Confidence in Zone Zone number 1 Mid West half of the zone is below Poor Improving Adequate high-quality evidence Adequate high-quality evidence target pH but there are indications and high level of consensus and high level of consensus that soil pH is gradually improving. 2 Mullewa to The majority of soils are below Poor Deteriorating Adequate high-quality evidence Limited evidence or limited Morawa target. With more than 70% of and high level of consensus consensus surface soils below target, the subsurface soil will continue to acidify. 3 West About half of the soils are below Poor Variable Adequate high-quality evidence Adequate high-quality evidence Midlands target, but the trend is relatively and high level of consensus and high level of consensus stable, with a few areas improving. 4 Central The majority of soils are below Poor Variable Adequate high-quality evidence Adequate high-quality evidence Northern target and stable over most of the and high level of consensus and high level of consensus Wheatbelt zone, with improvement in the north of the zone. 5 Swan to A large proportion of soils are Very poor Deteriorating Adequate high-quality evidence Limited evidence or limited Scott below target. The trend shows and high level of consensus consensus Coastal continuing deterioration. Plains 6 Darling With nearly 90% of surface soils Poor Deteriorating Adequate high-quality evidence Limited evidence or limited Range to below target, subsurface soils will and high of consensus consensus South continue to acidify. Coast 7 Zone of A large proportion of surface soils Poor Deteriorating Adequate high-quality evidence Adequate high-quality evidence are below target. Although the and high level of consensus and high level of consensus Drainage trend for surface soils is stable, the subsurface will continue to acidify.
Table 2.1.1 Resource status and trends summary for soil acidity Ag Soil Zone number Ag Soil Zone Summary Condition Trend Confidence in condition Confidence in 1 Mid West half of the zone is below target pH but there are indications that soil pH is gradually improving. Poor Improving Adequate high-quality evidence and high level of consensus Adequate high-quality evidence and high level of consensus 2 Mullewa to Morawa The majority of soils are below target. With more than 70% of surface soils below target, the subsurface soil will continue to acidify. Poor Deteriorating Adequate high-quality evidence and high level of consensus Limited evidence or limited consensus 3 West Midlands About half of the soils are below target, but the trend is relatively stable, with a few areas improving. Poor Variable Adequate high-quality evidence and high level of consensus Adequate high-quality evidence and high level of consensus 4 Central Northern Wheatbelt The majority of soils are below target and stable over most of the zone, with improvement in the north of the zone. Poor Variable Adequate high-quality evidence and high level of consensus Adequate high-quality evidence and high level of consensus 5 Swan to Scott Coastal Plains A large proportion of soils are below target. The trend shows continuing deterioration. Very poor Deteriorating Adequate high-quality evidence and high level of consensus Limited evidence or limited consensus 6 Darling Range to South Coast With nearly 90% of surface soils below target, subsurface soils will continue to acidify. Poor Deteriorating Adequate high-quality evidence and high of consensus Limited evidence or limited consensus 7 Zone of Drainage A large proportion of surface soils are below target. Although the trend for surface soils is stable, the subsurface will continue to acidify. Poor Deteriorating Adequate high-quality evidence and high level of consensus Adequate high-quality evidence and high level of consensus
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