{ "item_title" : "Geographic Variation in Forest Trees", "item_author" : [" Maria Morgenstern "], "item_description" : "Geographic Variation in Forest Trees is the first book to examine this subject from a world-wide perspective. The author discusses population genetic theory and genetic systems of native North American tree species as they interact with environments in the major climatic regions in the world. He then demonstrates how this knowledge is used to guide seed zoning and seed transfer in silviculture, basing much of his discussion on models developed in Scandinavia and North America. In the final chapter, the author addresses the issue of genetic conservation -- a subject of great concern in the face of accelerated forest destruction, industrial pollution, and climatic change. This comprehensive, well-researched book makes a significant contribution to the knowledge of one of our most important renewable natural resources.", "item_img_path" : "https://covers2.booksamillion.com/covers/bam/0/77/480/560/0774805609_b.jpg", "price_data" : { "retail_price" : "60.95", "online_price" : "60.95", "our_price" : "60.95", "club_price" : "60.95", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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