OK, with something something like the F-550 (on the small side for this use case, but also a reasonable choice for an ICE dump truck that's driving to/from agricultural fields), it could work:
That can move 14,870 lbs (minus the weight of the driver and the dump truck bed) per trip, so it would take more than 6.7 trips to deliver rock to treat an acre. At 6.7 trips per acre it would have to use less than 44 gallons of gasoline per trip for breakeven. It should use significantly less than that for fields that are somewhat close to an appropriate quarry / rockery.
The lightning can only move 7000 lbs per trip, so it would have to make 13.5 trips per acre.
https://www.ford.com/commercial-trucks/chassis-cab/models/f5...
That can move 14,870 lbs (minus the weight of the driver and the dump truck bed) per trip, so it would take more than 6.7 trips to deliver rock to treat an acre. At 6.7 trips per acre it would have to use less than 44 gallons of gasoline per trip for breakeven. It should use significantly less than that for fields that are somewhat close to an appropriate quarry / rockery.
The lightning can only move 7000 lbs per trip, so it would have to make 13.5 trips per acre.