Abstract: A polymer sheet adapted to attach to a material body such as a ceiling of a geological cavity and provide protective cover. The sheet comprises: a webbing portion defining a plurality of primary openings; and two margin portions extending along opposite edges of the sheet on either side of the webbing portion along a length of the sheet, each margin portion defining a plurality of secondary openings, wherein the margin portions are angled relative to the webbing portion.

Abstract: A polymer sheet adapted to attach to a material body such as a ceiling of a geological cavity and provide protective cover. The sheet comprises: a webbing portion defining a plurality of primary openings; and two margin portions extending along opposite edges of the sheet on either side of the webbing portion along a length of the sheet, each margin portion defining a plurality of secondary openings, wherein the margin portions are angled relative to the webbing portion.

Abstract: A polymer sheet adapted to attach to a material body such as a ceiling of a geological cavity and provide protective cover. The sheet comprises: a webbing portion defining a plurality of primary openings; and two margin portions extending along opposite edges of the sheet on either side of the webbing portion along a length of the sheet, each margin portion defining a plurality of secondary openings, wherein the margin portions are angled relative to the webbing portion.

Abstract: Some embodiments relate to a kit for forming a plant support. The kit may comprise: a plurality of polymer ring strips, each formable into a respective ring; a plurality of polymer stake sleeves, each sleeve defining an elongate channel to receive a stake therethrough and each sleeve defining a plurality of slots sized to receive at least a portion of a respective ring strip therethrough, the slots being defined at spaced locations along a sleeve length of each sleeve; and a plurality of polymer stakes, each stake being sized to fit through the elongate channel and having a stake length greater than the sleeve length, wherein each stake has a first end and an opposite second end, and wherein a lengthwise rigidity of the stake is sufficient to cooperate with the sleeves and ring strips to form the plant support when the first ends of the stakes are submerged in soil along with at least a portion of the sleeves.

Abstract: A polymer sheet adapted to attach to a material body such as a ceiling of a geological cavity and provide protective cover. The sheet comprises: a webbing portion defining a plurality of primary openings; and two margin portions extending along opposite edges of the sheet on either side of the webbing portion along a length of the sheet, each margin portion defining a plurality of secondary openings, wherein the margin portions are angled relative to the webbing portion.