求英语大神帮我翻译一句英语长句并分析一下句子成分，谢谢！

主语：  a neighboring construction site

谓语：may remain virtually free of

宾：vegetation

从句：from which the soil has been compacted or removed to expose a coarse, infertile parent material

despite (省略成分the neighboring construction site are) receiving the same input of seeds as the plowed field.

• A fertile, plowed field is rapidly invaded by a large variety of weeds, whereas a neighboring construction site （from which the soil has been compacted or removed to expose a coarse, infertile parent material 母质层）may remain virtually free of vegetation (几乎没有植被)（for many months or even years）（ despite receiving the same input of seeds as the plowed field）.

parent material，母质层，专业词汇

remain free of...固定搭配，译为“免于”

which指代一个名词，where≠from which, where=in/on/at/to等prep+which. 

from where=from+介词+which

a fertile plowed field is
rapidly invaded by a large variety of weeds,whereas a neighboring
constrauction site from which the soil has been compacted or removed to
expose a coarse,infertile parent material may remain virtually free of
vegetation for many months or even years despite receiving the same
input of seeds as the plowed field

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