Poplar crinkle disease is a new discovered in artificial poplar forest in Heilongjiang province.

杨树皱叶病是在黑龙江省杨树人工林中新发现的病害。

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The wilting litter of the middle aged secondary mountain poplar forest and the decomposing process of litter as well as an amount of their accumulation were analysed with changes in time.

通过对黄土丘陵区中龄山杨次生林的凋落物及其分解过程，以及蓄积量随时间变化的分析，研究了枯枝落叶层的持水和截留作用及其蓄水减沙效益。

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He's also retraced the route of Thomas Jefferson, who drove from his Monticello home to Poplar Forest in Lynchburg, Va.

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