Hi liberyworms. Yes the pvc down the rows is the watering system.

I recently added some to rows I got into production this year, https://steemit.com/gardening/@florio/garden-update-mittlieder-irrigation-system-4-2-18

I've had very good luck with the in the garden greenhouse hoops. You drive pvc down into the round ~ 10 inches. We had a really nasty wind storm a week or two ago, and some of the agribon blew off, as it's just held on by the clips, however the hoops held up just fine, no problem.

Here's a link to a post talking about the in the garden greenhouse. https://steemit.com/garden/@florio/garden-update-more-potato-planting-agribon-and-in-the-garden-greenhouse-construction-3-5-18