Specifications include, but are not limited to: A. Total Seedlings Per Acre ‘Total Seedlings per Acre’ means the estimated number of Seedlings to be planted per acre, averaged over an entire Unit, or a contiguous area within a Unit. This number varies between Units, and is listed in the Unit Description (Section II-A). B. Seedlings Per Acre by Species ‘Seedlings per Acre by Species’ means the number of Seedlings of an individual species to be planted per acre, averaged over an entire Unit, or a contiguous area within a Unit. If only one species is to be planted over a Unit, or a contiguous area within a Unit, this number is the same as the Total Seedlings per Acre. If multiple species are to be planted over a Unit, or a contiguous area within a Unit, then the sum of all the Seedlings per Acre by Species will equal the Total Seedlings per Acre. C. Average Spacing ‘Average Spacing’ means the average distance (in feet) between planted Seedlings in the Unit, that will result in the correct number of Total Seedlings per Acre after planting, when Seedlings are planted in a grid pattern. Average spacing may be different for each unit, or for contiguous areas within a Unit, therefore Seedlings will be planted over the Unit at the Average Spacing listed in the Unit Description (Section II-A). D. Minimum Spacing Seedlings shall not be planted closer together than the Minimum Spacing (in feet) specified in the Unit Description (Section II-A), from: 1. Another Contractor-planted Seedling; 2. An acceptable previously planted Seedling; or 3. An acceptable natural Seedling Acceptable previously planted or natural Seedlings are conifer Seedlings which are at least six (6) inches tall, well formed, and vigorous. E. Variation to Average Spacing The spacing of individual Seedlings may vary within the limits of the Minimum Spacing, so long as average spacing is maintained.