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Phosphorus in Finnish soils in the 1900s with particular reference to the acid ammonium acetate soil test
acid soils bioavailability chemical fractions old soil samples total phosphorus
2010/8/16
Comprehensive research into phosphorus (P) in soils and crops began in Finland in the early 1900s. The average amount of total P in the ploughed topsoil layer of mineral soils was about two tonnes per...