美国维持长期的森林健康和生产力的有关概念社会需要森林维持多种多样的产品和定期产量，而传统的森林经营方式已不能满足当前社会的需要，因此，如何制定有效的政策和经营战略是摆在我们专业技术人员面前的一个严重的挑战。为促进森林健康和生产力的长期持续性，关键是改... The United States to maintain the concept of long-term forest health and productivity Society needs to maintain a variety of forest products and regular production, and the traditional forest management can no longer meet the needs of the current society, therefore, how to formulate effective policies and business strategies A serious challenge in front of our professional technicians. In order to promote the long-term sustainability of forest health and productivity, the key is to change ...