Actually the only urea producers in Brazil are Petrobras and Fosfertil. They are responsible of 40% of the country's demand for fertilizers and meat production.
Here are the biggest Urea producers in the world:
Yara 7,3 Norway Mosaic 5,5 USA Potash 3.8 Canada K + S 3.5 Germay Agrium 3,3 Canada ICl 3,0 Israel Terra 1.9 UK Growhow (Kemira) 1,5 Finland Sinochem n. i. China Ifcco n.i. India Eurochem n.i. Russia Phosagro n.i. Russia Safco n.i. Saudi Arabia EFC n.i. Egypt AFCCO n.i. Egypt Cherkassy n.i. Ukrain Koch n.i. USA Uralkaly n.i. Russia Togliatti Azot n.i. Russia