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Identifying Soil Constraints That Limit Wheat Yield In The South-West Of Western Australia, Dennis Van Gool
Identifying Soil Constraints That Limit Wheat Yield In The South-West Of Western Australia, Dennis Van Gool
Resource management technical reports
Wheat is grown on about 18 million hectares in the South-West Agricultural Region of Western Australia from north and east of Geraldton to Esperance in the south-east. Yields are frequently constrained by a range of soil factors.
This report uses existing conventional soil-landscape mapping to analyse the effects of 17 known soil constraints that limit crop production and roughly prioritises the areas where they occur.
Traditional land capability maps are prepared using a most-limiting factor approach, which assumes that ameliorating the most limiting constraint will result in a yield increase until the next most-limiting constraint is reached. Where there are …
Identifying Soil Constraints That Limit Wheat Yield In The South-West Of Western Australia, Dennis Van Gool
Identifying Soil Constraints That Limit Wheat Yield In The South-West Of Western Australia, Dennis Van Gool
Resource management technical reports
This is a novel approach using regional-scale information. The analysis estimated that:
- most of the wheat-growing land in south-west WA has one or more soil constraints
- about 1.6 million hectares (9% of the total area) are not suitable for cropping
- about 2.2 million hectares (12% of the total area) are suitable for cropping but are subject to many (more than 3) constraints; soil amelioration is unlikely to significantly improve profitable yield gain
- subsurface acidity extends over 12.6 million hectares (about 70% of the total area); about 7.6 million hectares of that area (42% of the total area) is estimated to …