So far it seems the row with a light layer (~1") of wood chips tilled in is doing the best, better than the control row with no wood chips.
During the unusual spring frosts, we lost almost all of the plants that received chemical fertilizer. The plants that received organic fertilizer only suffered mild frost damage.
The row with thin layer of fresh Eucalyptus chips mixed in is doing fine. Where a thick layer was mixed in, the plants are not doing well.
The row with heavy wood chips, was not doing well, lost most plants and replanted. The plants have only greened up in the last week and are much smaller than the others. But it seems they may do OK now, too early to tell.