What are the advantages of inter-cropping and crop rotation?

(N/A) Advantages of inter-cropping:
$1$. It helps in maintaining soil fertility.
$2$. It saves time and labour.
$3$. It increases productivity per unit area.
$4$. Both crops can be easily harvested and threshed separately.
Advantages of crop rotation:
$1$. It improves soil fertility.
$2$. It reduces pest infestation and diseases.
$3$. It helps in weed control.
$4$. It avoids the depletion of a particular nutrient from the soil.