I’ve read several articles on solarization that were released by county extension services in various parts of the country. It seems that clear plastic is more effective than black plastic, according to a couple of studies done over the past decade.
Note: The black plastic on the left was installed June 25th; most everything under the black plastic was dead. Rain had pulled the plastic back in some places, despite the use of landscape staples every two feet.
Plastic that was put down on 7.6 had partially killed the grass.
July 18th, Mike and I pull up the black plastic and put down the correct clear material. We also adjusted the angle of the beds to better accommodate the slope of the hill. There are six beds, about 12 feet wide ranging from 20-30 feet wide. I have left 6 feet between beds for the tractor to navigate between the plots (it is a small tractor), it may not be enough room.
Collected Antennaria plantaginea and Pityopsis gramminifolia today. Possibly found a lily near the Antennaria. Marked both with flagging. They are both along a deer trail at the top of the north facing bluff along the creek.