| WPs | Topic | Institution | PI | Content |
| 1 | Atomic and molecular scale |
| 1-1 | Overcoming P immobility | BTU | D. Freese | P-Fixation by Al- and Fe-oxides |
| 1-2 | UoR | O. Kühn | Quantum-chemical modelling P at soil matrix |
| 1-3 | Microbial P acquisition processes | UoR | C. Baum | The role of the soil microbiome for P supply of soils |
| TUM | M. Schloter |
| 1-4 | Spatial heterogeneity of P in subsoil | FZJ | N. Siebers | Speciation and importance for P-nutrition by 31P NMR, XANES, P fractionation, isotope techniques |
| 2 | Plot-to-field scale |
| 2-1 | Agronomic effectiveness of P resources | UoR | B. Eichler-Löbermann | Pot and field experiments with different P fertilizers, crops and soils |
| TUM | S. v. Tucher |
| 2-2 | Smart P fertilizers | JKI | K. Panten | Field experiments with new alternative P fertilizers, crops and soils |
| 2-3 | Metastudies P fertilization effects | UoR | U. Buczko | Data evaluations from long-term experiments and field studies, statistical data treatment, model building |
| 3 | Field-to-catchment scale |
| 3-1 | Hot moments of P loss | UoR | B. Lennartz | Observation and modeling of P leaching and transport at catchment scale |
| 3-2 | Hot spots of P loss |
| 3-3 | Model development and testing |
| 4 | 4-1 | P analyses | UoR | P. Leinweber | XANES, 31P-NMR for soil samples |
| 4-2 | Quality management | and coordination of analyses |
| 4-3 | Bone char effects on P cycling | Bone char characterization e.g. REM, EDX, Py-FIMS, P release studies |
| 4-4 | Central data storage | Data quality management, coordination with BonaRes-center |
| 4-5 | Industry, farmer and other stakeholder contacts | Coordination of subcontractor contributions |
| 4-6 | Ethical and socio-economic aspects of P fertility | Leipzig | F. Ekardt | Instruments of policy for more P effectiveness |