Abstract: A low cost, modular plant irrigation system using any convenient container as a reservoir to hold water, including a detachable manifold connected to the reservoir, one or more detachable dripper devices to produce by gravity droplets of water to flow through detachable tubing of selectable sizes and lengths from the manifold to a variable number and types of plant sites, and additional control devices at either or both the dripper devices and the plant sites to individually control selectively and variably the amount of water flowing to each plant site.

Abstract: A shelter for protecting young plants comprising a shell made from a resilient resin material, formed of two substantially identical mating sections integrally formed with connecting snaps and selectively closable openings for providing air and irrigation to the plants.

Abstract: A shelter for protecting young plants has a shell (10) made from a translucent resin material. Windows (28) are formed through a peripheral wall (16) on one side of the shell (10) for controlling the admission of light and air into the shelter. A hood (30) made from a transparent film of resin material covers the windows (28) to conserve heat and moisture within the shelter. The young plants are acclimated to their surroundings by progressively removing the hood (30) from the windows (28).

Abstract: This invention relates to a quickly assembled prefabricated metal concrete pouring form for slabs and the like that remains in place as an integral part of the finished structure. The basic elements of the structure are exterior wall sections with each containing a series of vertically-aligned pairs of slots arranged in parallel horizontal rows throughout the length thereof and which can be telescoped into overlapping relation to place selected pairs of these slots in registry with one another to receive the hook-forming elements of one or more types of connectors that lock the sections together in freestanding assembled condition. Two of these connectors, namely, a ground stake and a detachable endpiece of a spreader subassembly both include a vertically-spaced pair of downturned hook-forming elements to effect the locking action while the corner sections employ horizontally-spaced pairs of horizontally-disposed tongues for this same purpose.

Abstract: This invention relates to a stock watering trough that is kept covered at all times when not in use by a pair of floating lid sections hingedly attached on opposite sides of a transversely-extending support therefor. The lid sections each have a crowned configuration that results in the marginal edges thereof being immersed below the level of the water upon which they float. A thermostatically-controlled immersion heater, float-actuated shut-off valve and overflow drain are all located within a protected area beneath the lids between a pair of oppositely-inclined stops for the latter. These lid sections cooperate with one another and said stop to define shields interposed between the aforementioned working parts and the drinking animals. The exposed surfaces of the trough including the lids are formed from a smooth, easily-cleaned light-colored plastic material laminated to a dark-colored backing impregnated with a heat-reflective substance, preferably ablated mica.