![]() Neither treatment improved pine survival. A second bedding pass (double bedding) reduced grasses and woody shrubs, and the herbicide imazapyr reduced grasses and herbaceous broadleaf weeds. Seedlings with 4.5-mm diameters averaged 75% survival. Seedling class greatly influenced survival with large-diameter classes (8.5-11.5 mm) exhibiting the best survival (87-99%). Initial survival and fourth-year performance were examined in relation to ( i) method of site preparation, (ii) herbicide application, and (iii) seedling class (based on root-collar diameter) and to associated establishment costs. The optimum seedling is defined as the ideotype that will minimize overall reforestation costs while achieving established goals for initial survival and growth. var elliottii) study was established to determine the "optimum" seedling size for use on a flatwoods site in the Coastal Plain physiographic province of Georgia, U.S.A. For equation, when using English units rather than metric units, a different model form was selected.Ī slash pine (Pinus elliottii Engelm. Equations presented in that publication were fit in metric units but equivalent equations in English units are provided in Appendix I for equations, and through. VanderSchaaf and South (2008) published a detailed description of modeling approaches. RCDlob is a distance-independent individual tree growth and yield model that allows users to input various distributions of root collar diameter (RCD) at time-of-planting for loblolly pine plantations. RCDlob is a growth and yield program that allows users to ask the question: should I plant larger stock and fewer seedlings or should I plant smaller stock and give extra weed control? Volume data used to develop this program are from block-plots (South et al. Nursery stock may vary in size from seedlings that have a 2 mm root-collar diameter (RCD) to seedlings that have a 13 mm RCD. The optimum seedling is defined as the ideotype that will minimize overall reforestation costs while achieving established goals for initial survival and growth (South and Mitchell 1999).
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