Thank you, Toni, for your question!
  I need to ask some questions to help me better understand your situation. 
  When did this begin or start? 
  Is this soil purchased? Had you placed any manure or fertilizer on it recently?
  Can you explain the origin of the shredded wood? Had you chipped them or were they purchased?
   Is this a new garden space? If not, what was planted there last year? Were there any issues last year at this location?
  Is this white material throughout the soil in your garden?
   If possible, a close up of the white material.
Thank you for providing this added information!
  
  

Thank you for your question, Toni!
    To alleviate some guess work I suggest a soil test which can be purchased here.
Home | MSU Soil Test
 You will have the results in a timely manner to make adjustments to your garden soil for this year and next. You may wish to ask for an additional salinity (salt) test which is not included. 

 Without closer examination of the white film, it may be one of two things. 

  The first may be a salt residue from possible fertilizer, manure, or from the wood chips. It appears as if there is a line in your soil indicating that this may be the case. 
  Solution would be to not add any more fertilizer to the soil, try and water the soil to wash the salt down below the root line of your plants. Another suggestion is to combine organic matter to the existing soil to try and reduce the effect of the salt.
  The article listed below has more suggestions
Solutions to Soil Problems I. High Salinity (soluble salts) | USU

salts.pdf

  A second scenario would be if your white substance is white mold. 
  This article included for you to help determine 
White mold in the garden | UMN Extension
White mold is caused by a fungus that has entered your garden either through the wind, animal, seed or plant. The best solution is to increase ventilation of your plant and remove any that show signs of infection. At the end of the season you may wish to treat your garden with a fungicidal agent containing thiophanate-methyl, that targets the Sclerotinia sclerotiorum, the fungus that causes white mold.   
Further reading:
Durable management strategy for white mold.pdf


I strongly recommend starting out with a soil test initially.

Please reply back if you have more questions.
   

Thank you for the thoughtful questions and suggestions. 

Thank you for your question, Toni!
    To alleviate some guess work I suggest a soil test which can be purchased here.
Home | MSU Soil Test
 You will have the results in a timely manner to make adjustments to your garden soil for this year and next. You may wish to ask for an additional salinity (salt) test which is not included. 

 Without closer examination of the white film, it may be one of two things. 

  The first may be a salt residue from possible fertilizer, manure, or from the wood chips. It appears as if there is a line in your soil indicating that this may be the case. 
  Solution would be to not add any more fertilizer to the soil, try and water the soil to wash the salt down below the root line of your plants. Another suggestion is to combine organic matter to the existing soil to try and reduce the effect of the salt.
  The article listed below has more suggestions
Solutions to Soil Problems I. High Salinity (soluble salts) | USU

salts.pdf

  A second scenario would be if your white substance is white mold. 
  This article included for you to help determine 
White mold in the garden | UMN Extension
White mold is caused by a fungus that has entered your garden either through the wind, animal, seed or plant. The best solution is to increase ventilation of your plant and remove any that show signs of infection. At the end of the season you may wish to treat your garden with a fungicidal agent containing thiophanate-methyl, that targets the Sclerotinia sclerotiorum, the fungus that causes white mold.   
Further reading:
Durable management strategy for white mold.pdf


I strongly recommend starting out with a soil test initially.

Please reply back if you have more questions.

You are most welcome Toni!
Enjoy learning all you can about gardening! 
A great resource is 
Gardening in Michigan (msu.edu)
which has all kinds of articles on many topics that may interest you!