Sep 24, 2020
11772
The short answer--silage tarp is a borrowed technology where white side up and black side down is used to prevent spoilage or breakdown of silage.
Market gardeners generally use the black side up to encourage breakdown and assimilation of cover crops or green manures and suppress weeds.
However, white side up could also be used by farmers in summer greenhouse aisles to reflect heat thus preventing soil temperature increase.