It showed that stand had already entered optimal felling period.
确定杨树速生林适宜采伐期,与树种结构、林龄、林分密度和林木连年生长量有直接关系,当林分密度进入极限时,林木连年生长量开始从高峰下降,说明林分已进入适宜采伐期,实行适宜采伐期采伐作业,可获最佳经济效益。
AN INVESTIGATION ON THE SELECTIVE CUTTING CYCLE OF PICEA AND ABIES FORESTS IN TAOHE FOREST REGION OF GANSU PROVINCE
甘肃省洮河林区云杉、冷杉林择伐周期的调查研究
Study on cycle Thinning of Picea koraiensis plantation
红皮云杉人工林抚育间伐周期的研究
Choose a wife on a Saturday rather than a Sunday .
择妻在周末，胜过星期天。
It allows one to choose the measuring cycle period by automatic pre-selection.
它可以用自动选择档选择测量周期。
Study on the Comprehensive Decision of Yielding Age of Short Rotation Timber Plantation
短周期人工用材林合理采伐年龄综合决策的研究
Effect of Fluvastatin on Renal Cell Cycle Negative Regulation Protein p27 in Diabetic Nephropathy Rats;
氟伐他汀对糖尿病肾病大鼠细胞周期负调控蛋白p27影响
Show week numbers~~Displays week numbers in Date Navigator.
显示周编号~~在“日期选择区”中显示周编号。
No recurring scheduler is selected, please select daily, monthly or weekly.
未选择定期计划程序，请选择每日、每月或每周。
No recurring schedule has been selected. Please select daily, monthly or weekly.
未选择定期计划。请选择每日、每月或每周。
Students choose their classes a few weeks before the start of each term.
学生在每学期开始的几周前选择课程。
Clinical Investigation of Peripheral Facial Palsy Treated with Elective Acupuncture;
择期针刺治疗周围性面瘫的临床研究
The Analysis of End-of-life Product Recycling Choices Mode;
生命周期结束产品再生模式选择分析
The Enterprises Periodical Financial Characteristics and the Choices of Different Fund-raising Ways;
企业周期性财务特征与筹资方式选择
Study on the Selection of Supply Chain Based on Product Life Cycle;
基于产品生命周期的供应链选择研究
Electromagnetic analysis of finite periodic frequency selective surfaces
有限周期频率选择面的电磁特性分析
Cycle Division of Dry Bulk Shipping Market and Opportunity of Time Charter
国际干散货航运市场周期划分与期租时机选择
Research on Enterprise Business Strategy Choosing Based on Lifecycle of Enterprise and Industry;
基于企业生命周期和产业生命周期的企业竞争战略选择研究
Life-cycle assessment will be adopted in selection of building materials.
建筑材料选择中进行产品生命周期环保评价。