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Dyfyniad Arddull ChicagoSyers, J.K. Efficiency of Soil and Fertilizer Phosphorus Use: Reconciling Changing Concepts of Soil Phosphorus Behaviour With Agronomic Information. Rome: Food and Agriculture Organization of the United Nations, 2008.
Dyfyniad MLASyers, J.K. Efficiency of Soil and Fertilizer Phosphorus Use: Reconciling Changing Concepts of Soil Phosphorus Behaviour With Agronomic Information. Rome: Food and Agriculture Organization of the United Nations, 2008.
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