On the base of assuring survival rate and conserving rate, the less the fee used in soil preparation and young growth tending is, the higher the economic benefit is.
在保证造林成活率和保存率的基础上，用于整地和幼林抚育方面的经费越少，经济效益则越高。
This paper use the method of statistics to study effect of different tending measures on the growth of manchurian ash and walnuts young plantation.
本文应用统计分析方法研究了不同抚育措施对水曲柳、胡桃楸幼林生长的影响。
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