poor soil是什么意思

用法例句

were conducted at two experimental sites located at infertile mountainous areas of Wujiang valley by using different coverage measure for water-retaining.

在乌江峡谷瘠薄山地的典型地段设立了两个造林试验点,采用不同的种植穴土壤覆盖保水措施进行了夹竹桃、柏木、刺桐、黄葛树、黄花槐5个树种的植苗造林试验,结果表明:不同的种植穴覆盖措施对不同树种当年的植苗造林成活率及成活植株3年生时的保存率均产生显著影响,地膜覆盖的当年植苗成活率最高,而杂草覆盖保存率最高。

The infertile red soils distributed widely in South China are important resources for agricultural exploitation in the future and can sequestrate potentially large amounts of atmospheric CO 2.

通过田间定位试验观测 ,研究了瘠薄红壤条件下主要有机物质的分解速率和过程特征及控制因素。