SAO PAULO, April 4 (Reuters) - Indigenous protests and poor roads have disrupted shipping of Brazil’s bumper soybean crop in recent days via the river port of Miritituba in the Amazon rainforest, worrying global companies including Cargill and Bunge (BG.N) which have important operations.

Abiove, an association representing grain handlers, said on Friday road access to Miritituba has remained under partial or total blockade for two weeks, preventing the shipment of around 70,000 tons of grains per day, which corresponds to almost $30 million in product value.