Emergency crews have managed to remove the man from underneath the tanks, which were attached to a tractor.

"Paramedics were called at 11.45am to Myall Park to reports of a man trapped underneath spray tanks," an Ambulance NSW spokesman confirmed.

A State Emergency Service team worked to free the man, believed to be aged 78, after both legs became trapped by the farm equipment.

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Paramedics were treating the man, who was conscious and alert, at the scene for injuries to his leg - which is possibly fractured - and swelling to the ankle.

He is being taken to Griffith Base Hospital for further treatment.