T. Zou1, X. Zhang1 and E. A.
Davidson1
1Appalachian Laboratory, University of Maryland Center
for Environmental Science, Frostburg, MD, USA.
Corresponding author: Xin Zhang
(xin.zhang@umces.edu)
Key Points:
- Two phosphorus challenges have arisen as the world is trying to meet
increasing food demand: phosphorus depletion and phosphorus pollution
- To address these challenges, phosphorus use efficiency would need to
increase from the current 60% to 69-82% globally, but with different
regional implications.
- Phosphorus use efficiency has been significantly affected by
socio-economic and agronomic factors, including economic development
and fertilizer to crop price ratio