Abstract: A cover to protect plants, such as rosebushes, azaleas, rhododendrons and the like, against winterkill and to maintain the plants in a dormant state is provided in the form of a multilayer bag with an air space between the layers, skirts or flaps at the mouth of the bag adapted to be covered with earth and a drawstring for closing the mouth of the bag around the crown of the plant. The layers of the bag permit air and vapor to breathe therethrough, but the bag is impervious to rain, snow, ice and strong air blasts. An inner layer of the bag is opaque and dark colored, preferably black, to keep the plant in a dark environment so as not to encourage premature growth. An outer layer of the bag is light colored, preferably white, to reflect the winter sun's rays. The materials forming the layers of the bag are nonwoven spun-bonded textile fabrics.

Abstract: Artificial "seaweed" or anti-erosion interceptor devices have a plurality of buoyant sheets or fingers roped together in spaced end-to-end relation on a lake bed bottom in patterns or contours which will best intercept sediment in the water to build up the lake bed bottom. The fingers or sheets have rope receiving sleeves at their bottom ends and float receiving sleeves or pockets at their top ends. The bottom ends are also preferably weighted down on the lake bed bottom by sediment filled tubes under the rope receiving sleeves. The buoyant fingers or sheets may be slit at their top ends to provide a plurality of narrow ribbons each having a float at its top end. In place of the individual floats for each ribbon, the sheets may have sleeves receiving a floating rope and this rope in some instances can carry depending sheets with free bottom ends.

Abstract: Artificial "seaweed" or anti-erosion devices placed in waters where shoreline erosion occurs work with nature to accrete water bottom sediment, such as sand, to establish and maintain beaches along shorelines. The seaweed is planted outwardly from the shoreline in predetermined locations to form rows of buoyant flexible finger sheets effective to trap sediment suspended in the water. The sheets are anchored to water pervious elongated hollow flexible tubes filled with lake bottom sediment as they are deployed and have low density floats sealed therein to increase their buoyancy. For efficient accretion, the still water level and the lake bottom profile are determined. The tubes are then deployed in lake bottom troughs and on mounds outwardly from the shoreline to form rows of finger sheets generally parallel with the shoreline.

Abstract: Artificial "seaweed" or "reefs" for installation on the bottoms of lakes or the like to build up sandbars to reclaim beaches and reclaim coastal land has elongated hollow tubes partially filled with sand, silt or other lake bottom material to lie stationary on the lake bottom in spaced side-by-side relation at a selected orientation relative to the shore line and connectd by anchor means for buoyant sheets or ribbons which will float upright in the water to trap sand and sediment for building up sandbars and reefs on the lake bottom. In one embodiment, the side-by-side hollow tubes are formed along the side edges of a wide sheet of plastics material which is slit at selected intervals and the buoyant sheets or ribbons are threaded through these slits providing a pair of upstanding buoyant legs in spaced relation. In another embodiment, the tube connected by strands or filament receiving looped ends of the buoyant sheets or ribbons in end-to-end relation.