Allied to the breeding programmes are investigations into other associated techniques such as time of planting and seeding rate. 与育种项目密切联系的是进行相关技术的调查，如播期和播种量。
Effects of Sowing Seed Quantity and Seedling Culture Density on the Quality of Nursery Stocks of Phellodendron amurense Rupr. 播种量与青苗密度对黄波罗苗木质量的影响。
