Publication Date
1989
Description
In south-eastern Australia, pasture improvement and the use of superphosphate fertilizers have resulted in the gradual acidification of many soils under subterranean clover pastures (Williams, 1980). Despite high values of exchangeable and extractable aluminium (and low pH) recorded in many soils, there are few reports of significant responses of clover growth to lime application in the field. In this study we examined the vertical distribution of CaCb-extractable aluminium (Al) and available phosphorus (Bray P) in pasture topsoils. We also simulated the conditions in the field sites by investigating in solution culture the response of subterranean clover to various concentrations of subsurface Al and surface P.
Citation
McLaughlin, M J. and James, T R., "Distribution of Phosphorus and Aluminum in Acidic Pasture Soils and Effects on Growth of Subterranean Clover" (2025). IGC Proceedings (1989-2023). 15.
https://uknowledge.uky.edu/igc/1989/session1/15
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Distribution of Phosphorus and Aluminum in Acidic Pasture Soils and Effects on Growth of Subterranean Clover
In south-eastern Australia, pasture improvement and the use of superphosphate fertilizers have resulted in the gradual acidification of many soils under subterranean clover pastures (Williams, 1980). Despite high values of exchangeable and extractable aluminium (and low pH) recorded in many soils, there are few reports of significant responses of clover growth to lime application in the field. In this study we examined the vertical distribution of CaCb-extractable aluminium (Al) and available phosphorus (Bray P) in pasture topsoils. We also simulated the conditions in the field sites by investigating in solution culture the response of subterranean clover to various concentrations of subsurface Al and surface P.
