Sources and Rates of Phosphorus in a Cultivation System Integrating Crop and Pasture Production in the State of Parana

Adriel Ferreira da Fonseca, Ponta Grossa State University
Department of Soils
Phone: (42) 3220-3777/3091
Email:
Av. Carlos Cavalcanti, 4748
Ponta Grossa, Parana
84030-900

---

Luís Prochnow, International Plant Nutrition Institute (IPNI)
Phone: 55 19 3433 3254
Email:
Avenida Independência, 350
Edifício Primus salas 141 e 142
Piracicaba-SP, Brazil
13.419-160

---