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Title:   Author  item
                                            Malone, Robert

                                                         - *Rob*item
                                            Shipitalo, Martinitem
                                            Ma, Liwangitem
                                            Ahuja, Lajpatitem
                                            Owens, Lloyd
  Submitted to: Agronomy Abstracts
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 11/1/1999
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary:
                                Technical Abstract: Pesticide movement into subsurface soil and into groundwater is often transported via macropores (worm holes, root channels, etc.).  One of the few readily available contaminant transport models that has a macropore component is the Root Zone Water Quality Model (RZWQM).  This model has been tested and assessed under numerous conditions but the macropore  component is relatively untested.  Our objective was to assess the macropore component of the RZWQM using data from undisturbed soil blocks that contained natural macropores.  To accomplish this, atrazine and alachlor were surface-applied to 30 by 30 by 30 cm blocks of undisturbed, no-till silt loam soil then the blocks were subjected to a 0.5-hr, 30 min simulated rain.  Preliminary results indicate that the RZWQM may adequately simulate pesticide movement through macropores.


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