Global Phosphorus Flows and Environmental Impacts from a Consumption Perspective

By Yi Liu, Gara Villalba, Robert U. Ayres, H. Schrøder. 2008

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Agronomic phosphorus imbalances across the world's croplands (2011, background): “16), most previous global P balance studies have relied on globally or regionally aggregated data (4, 5, 17, 18), limiting our ability to infer spatial patterns of surpluses and deficits.”
Life's Bottleneck: Sustaining the World's Phosphorus for a Food Secure Future (2014, background): “Several global phosphorus flow analyses have been undertaken in recent years, with some focusing more on phosphorus fluxes within the food system (5, 20, 21) and others having a greater emphasis on phosphorus fluxes from the food or agricultural system to the world’s oceans and fresh water bodies (1”
Residual soil phosphorus as the missing piece in the global phosphorus crisis puzzle (2012, positive): “We used global values from Liu et al. (36) for P supply from weathering (1.6 Tg · y − 1 ) and atmospheric deposition (0.4 Tg · y − 1 ).”
Phosphorus demand for the 1970-2100 period: A scenario analysis of resource depletion (2010, background): “Similar figures have been compiled recently for 2004 by other analysts (Liu et al., 2008; Villalba et al., 2008).”
Sustainable Use of Phosphorus (2010, background): “However, on the global scale there is a neutral (Smil, 2000) or even a negative phosphorus balance for crop land (Liu et al., 2008) implying that accumulation in some regions is balanced by depletion in other (less privileged) regions (Stoorvogel et al.”