<H1>Core Aerification</H1>
   <P><UL>
   <LI><H2>Previously thought to break up herbicide layer and reduce weed control
   </H2>
   </UL><UL>
   <LI><H2>Research shows little increased crabgrass or goosegrass due to core aerification</H2>
   </UL></P>
   <P></P>
   <P>