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美国针叶树育苗造林专家在中国三北 ００９项目工作期间，介绍了温室容器育苗和露地育苗技术以及施用硫改良 ｐＨ值偏高土壤的经验；同时建议使用硬塑料容器培育针叶树苗木，或使用涂有氢氧化铜的软塑料容器育苗，还建议项目区苗圃由使用尿素肥料改用硫酸铵肥料，对解决我国三北地区育苗造林中存在的技术问题具有一定的作用。
Coniferous seedling nursery experts in the United States during the three 009 project in China, introduced the greenhouse container seedling and field nursery techniques and the application of sulfur to improve the soil pH value of the high experience; the same time recommended the use of hard plastic containers conifer seedlings, or coated with hydrogen It is suggested that the use of urea fertilizer instead of ammonium sulfate fertilizer in the nursery of the project area should also play a role in solving the technical problems in seedling and afforestation in the Three North regions of China.