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研究油松１—５株大树法选优之间的关系和大树法与小标准地法的关系，探讨改进油松选优的途径，为提高油松优树选择效率提供理论依据
To study the relationship between tree selection and tree selection of Pinus tabulaeformis and the relationship between the tree method and the small standard method and to explore the ways to improve the selection of Pinus tabulaeformis trees and to provide a theoretical basis for improving the tree selection efficiency