Weed seed in dairy manure depends on collection site

David Cudney, Steven Wright, Thomas Shultz, John Reints
1992 California Agriculture  
Dairy manure collected for 2 years from various sites in seven Central California dairies was found to contain viable weed seed. Weed seed Contamination Was most Severe when manure was taken from dry COW pens and liquid manure sedimentation handling facilities. Composting did not eliminate all viable weed seed.
doi:10.3733/ca.v046n03p31 fatcat:ljp7nkpocbaozgpqdljibs4gx4