A manual open bottom shelf allocation and management system for allocating shelf space among rows of products and for moving the rows of products toward the front of the shelf includes a plurality of adjacent shelf allocating and managing units. Each unit includes a pair of side dividers extending away from a front to a backstop defining an open bottom, wherein at least one row of products may be positioned on the shelf between the side dividers and wherein the side dividers provide for substantive lateral support for the product. Each unit is manually movable between the front and the back of the shelf and is adapted to advance at least one row of products toward the front of the shelf. The side dividers of two adjacent units may be in vertical alignment with one another.