2 sentences

1. 这里的土层很薄，不长庄稼。

   zhè​lǐ de tǔ​céng hěn báo, bù zhǎng zhuāng​jia.

   The soil layer here is very thin and crops do not grow well.

   Source: Dong Chinese Dictionary

2. 这棵老树的根已经扎进了土层深处。

   zhè kē lǎo shù de gēn yǐ​jīng zhā​jìn le tǔ​céng shēn​chù.

   The roots of this old tree have struck deep into the soil.

   Source: Dong Chinese Dictionary