Abstract: An agricultural crop freeze control method and apparatus that can be effectively used to prevent growing crops such as avocado and citrus crops from freeze damage. The apparatus includes an irrigation system within which one or more commercially available tankless water heaters are installed to controllably heat the water that is delivered to the crop.

Abstract: An agricultural crop freeze control method and apparatus that can be effectively used to prevent growing crops such as avocado and citrus crops from freeze damage. The apparatus includes an irrigation system within which one or more commercially available tankless water heaters are installed to controllably heat the water that is delivered to the crop.

Abstract: A retractable awning for attachment to a structure, such as the side of a recreational vehicle, is provided. The awning includes a shade adapted to be moved from a furled position in which the awning is secured adjacent to the vehicle to an unfurled position in which the shade provides protection from sun and rain. The awning has an upper rafter bar and a lower upright support and a locking structure for locking the rafter bar in an extended position. This locking structure can be remotely released through the use of a release arm. The awning also includes a locking structure for locking the rafter bar to the upright support. This locking structure includes a locking pin located on the rafter bar and a locking keeper slidably mounted on the upright. The upright comprises a first channel member slidably mounted within a second channel member through the use of a slider structure. The slider structure comprises a low friction surface, such as an ultra-high molecular weight polyethylene material.