Authors
Graham K MacDonald, Elena M Bennett, Philip A Potter, Navin Ramankutty
Publication date
2011/2/15
Journal
Proceedings of the National Academy of Sciences
Volume
108
Issue
7
Pages
3086-3091
Publisher
National Acad Sciences
Description
Increased phosphorus (P) fertilizer use and livestock production has fundamentally altered the global P cycle. We calculated spatially explicit P balances for cropland soils at 0.5° resolution based on the principal agronomic P inputs and outputs associated with production of 123 crops globally for the year 2000. Although agronomic inputs of P fertilizer (14.2 Tg of P·y−1) and manure (9.6 Tg of P·y−1) collectively exceeded P removal by harvested crops (12.3 Tg of P·y−1) at the global scale, P deficits covered almost 30% of the global cropland area. There was massive variation in the magnitudes of these P imbalances across most regions, particularly Europe and South America. High P fertilizer application relative to crop P use resulted in a greater proportion of the intense P surpluses (>13 kg of P·ha−1·y−1) globally than manure P application. High P fertilizer application was also typically associated with areas of …
Total citations
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Scholar articles
GK MacDonald, EM Bennett, PA Potter, N Ramankutty - Proceedings of the National Academy of Sciences, 2011