Also keep an eye on the roots, raised soil can mean an unsound root system and a unsafe tree.
同时也要查看树根，隆起的土壤意味着扎根不实，不安全的树。
Soil microbes and plant root systems together form a stable dynamic system, where they interact with each other.
土壤微生物与植物的根系形成一个稳定的动态系统，在这个系统中它们之间相互作用，相互影响。
The percentage of root biomass allocated to cluster roots increased in the soil layer supplemented with P in a split-root system.
在分根系统中，白羽扇豆的排根占根系干重的比例在局部供磷（羟基磷灰石）的土层中大量增加。
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