replicate  taxon    date_addition  time_local_addition  time_gmt_addition  soluble_P  soluble_N  
A          Diatom   03/16/2011     03:13:28             13:42:00           0.646      0.169      
B          Diatom   03/16/2011     4:15:15              14:43:00           0.465      0.203