YlELD MANAGEMENT 管理系统
thin-target yleld 薄靶产额
Term Structure of Yleld 收益率期限结构
A technological systenl of harvesting Hu Sang three times, in spring, summer and autumn, in an equal shoot yleld was set up by changing the traditional pruning and leaf harvest.
通过改变湖桑品种的枝条剪伐与桑叶收获方式．设计了湖桑全年三次等量条桑收获的技术体系。
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