Table 3 Effects of intercropping treatments and years on nitrogen content in roots, stems, and leaves of plants at the two experimental sites.

From: Effects of different intercropping systems on soil properties and tobacco yield and quality

 

Midu

Weishan

Root

Stem

Leaf

Root

Stem

Leaf

Treatment

***

***

***

***

**

***

Year

*

*

*

*

**

*

Treatment × Year

*

*

*

*

ns

*