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Abstract: Ponderosa pine trees representing 79 provenances were tested near Towner, N. Dak. Eight provenances can be recommended for planting in the northern Great Plains, based on 10 years in the plantation: 721 (Valentine, Nebr.); 720 (Ainsworth, Nebr.); 811 (Jordan, Mont.); (722 Chadron, Nebr.); 703 (Cave Hills, S. Dak.); 816 (York, Mont.); 704 (Slim Buttes, S. Dak.); and 757 (Rosebud, S. Dak.).
This book contains a selection of papers presented at the first International Symposium on Windbreak Technology, summarising the available worldwide literature on windbreaks and the response, both positive and negative, to wind protection. State-of-the-art information is presented on general design criteria, and principles of planting and establishment for a wide range of conditions and objectives. It provides descriptive information of tree and shrub species for arid, semi-arid, temperate and tropical areas, and their use in windbreaks.