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General Membership Meeting
"Biosolids Research: Our Knowledge
is Growing!"
June 11, 2008
Washington State University - Puyallup, WA
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Meeting participants try their hand at soil quality testing methods such as infiltration (upper and lower left) and compaction (upper
right).
Andy Bary (above), Washington State University, shares their aerated compost trials being used to
investigate the success of different feedstock ingredients that include King County biosolids + land clearing debris, King County biosolids +
construction debris and horse manure + bedding.
Craig Cogger (above), WSU, provides an overview of their dry biosolids product research to
compare the plant availability of nitrogen in growing turf grass with the following treatments:
• Sumner, WA dry biosolids
• SoundGro - Pierce County, WA
• Milorganite - Milwaukee,
WI
• Inorganic
N
• Urea
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