 After World War II, cotton crops became less profitable and sugar cane was planted in Sertaozinho.In the 1960s, Sertaozinho was again a center of conflicted labour relations in Brazil when sugar cane cutters and mill workers threatened to strike over pay.Sertãozinho is located about 20 km to the west of the town of Ribeirão Preto in the northern part of the state of Sao Paulo in Brazil.