一、Soil Formation托福听力原文： NARRATOR:Listen to part of a lecture in the geology class.MALE PROFESSOR:So,we all know soil.It's important to plant growth,right?And we know that there're different types of ...

The input of fresh organic matter, and the induced priming effect (PE), has long been recognized as a critical regulator of soil organic matter (SOM) ...

Soil is one of the important components of the sustainability of an ecosystem because it is the vitally important natural medium for the growth of vegetation. It can be defined as, the upper layer of ...