The overall goal is to develop practical, site-specific potassium (K) fertiliser management guidelines for high-rainfall cropping systems in the Upper South East, focusing on the limestone-loam soils in the region. Current knowledge gaps include the unreliability of potassium sufficiency thresholds, with soils testing as “adequate” (Colwell K >150 mg/kg) still exhibiting deficiency symptoms and yield losses. Research on K dynamics in limestone-loam soils remains limited at this time.
Richard Porter, AgXtra
The overall goal is to develop practical, site-specific potassium (K) fertiliser management guidelines for high-rainfall cropping systems in the Upper South East, focusing on the limestone-loam soils in the region. Current knowledge gaps include the unreliability of potassium sufficiency thresholds, with soils testing as “adequate” (Colwell K >150 mg/kg) still exhibiting deficiency symptoms and yield losses. Research on K dynamics in limestone-loam soils remains limited at this time.
$117,500
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