Design (short description):
Treatments:1. Control 2. P20 3. N40P40 4. P40K40 5. N40K40 6. N40P40K40 7. Manure 60 t/ha 8. Manure 40 t/ha 9. PK equivalent of manure 40 t/ha 10. 20 t/ha manure+NPK equivalent of manure 20 t/ha 11. N40P40K40 (Fallow), N70P40K40 (2d ana 3d crops) 12. N180P120K120. Rotations: Fallow- spring wheat- oats-oats.