Annoyed Neighbors

We are in the process of hauling liquid manure and to help us accomplish this job we have manufactured a manure truck equipped with a 5,000 gallon tank. This is a splendid way to get the job done. This afternoon I was busy spreading this fine looking, very black this year, stuff in a field near the road. Right across from the field is a home. We have never been reprimanded or screeched at before for the wonderful odors which are common when this project is being worked on. Today, I noticed someone waiting on the school bus and while she was waiting she had her cold eye trained on my progress. After the bus left she came wheeling into the field and flagged me down. This was our conversation.
Lady: "What is this stuff?"
Me: "Cow manure."
Lady: "Are you sure? That isn't human waste?" (You can now get human waste that has been through a treatment plant. You do need a certificate of approval from the land owner stating you can put it on her land. There have been some articles in the local paper about this sludge.)
ME: "No!"
Lady: "What is that pile of stuff over there?" (She was referring to some fly ash we are getting to spread on the fields. The fly ash replaces lime and comes out of the local power plant. It is also free which is a big plus.)
Me: "Ashes from the power plant."
Lady: "Are you sure that is cow manure?"
Me: "Yes." By now I am beginning to get tired of this silly and pointless conversation.
Lady: "Why don't you put it some where else? Are you SURE that is not human waste?"
Me: "Yes"
Lady: "Okay" (She sounded very weary. I would be weary to if I had to worry about this issue.)
She must be from the big bad city......