Definition of diastereomer. : a stereoisomer of a compound having two or more chiral centers that is not a mirror image of another stereoisomer of the same compound â compare enantiomer.
Most perennial weeds such as Johnsongrass. are also suppressed although vigorous plants or heavy in-. festations may lift plastic. Perennial sedges, and to a lesser. extent, grasses can puncture sheet mulches as the weeds. emerge from the soil, resulting in inadequate control.
Details. Poly sheeting is a generic term also often referred to as construction and agricultural film or Visqueen. Poly sheeting is made from Low-density polyethylene and is most often offered in clear or black. Poly sheeting is often used as a vapor barrier or drop cloth.