forest tree yield 林木产量
single tree yield 单株产量
tea-oil tree yield 油茶产量
yield per tree 单株产量
low yield jujube tree 低产枣树
fruit yield per tree 单株产量
low-yield loquat tree 低产枇杷
low yield tung tree forest 低产油桐林
Leaf yield of single tree 单株叶产量
·2,447,543篇论文数据，部分数据来源于NoteExpress
Tests running at two big sawmills, in Europe and in America, suggest that the improvement in yield can run from 2% to 18% for different kinds of tree, with an average gain of 10% in the value of the timber produced from a log.
ECONOMIST: Chopping wood
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