Rock phosphate, Phosphorus fertilizers, Superphosphates, Crop yield, Western Australia
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Field experiments conducted on our non leachng soils from 1975 to 1988 have consistently shown that rock phosphates, compared with freshly applied superphosphate each year, are a relatively ineffective fertilizer in the year of application and in the years after application.
Bolland, Michael D A and Gilkes, Bob
"Rock phosphates are poor fertilizers for non-leaching soils in south-western Australia,"
Journal of the Department of Agriculture, Western Australia, Series 4: Vol. 30
, Article 6.
Available at: https://researchlibrary.agric.wa.gov.au/journal_agriculture4/vol30/iss4/6