Lupins, Nutrient deficiencies, Deficiency diseases, Potassium fertilizers, Application
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Large areas of sandplain soils north of Perth are low in potassium levels, and responses to applied potassium have been large for both sub. clover and grain lupins.
This article indicates where potassium might be needed, and how to diagnose and overcome deficiencies in lupins.
Cox, Walter Jacob
"Potassium deficiency in lupins : identification, rates, times and method of application,"
Journal of the Department of Agriculture, Western Australia, Series 4: Vol. 19:
1, Article 10.
Available at: https://library.dpird.wa.gov.au/journal_agriculture4/vol19/iss1/10