Why cultivation is needed

39. Cultivating means removing weeds.

Weeds would prevent the groundnuts from growing well.

They take water out of the soil.

They take up the mineral salts of the soil or those you have added to the soil with fertilizers.
They cast shade.

Cultivation stirs the soil and lets air into it.

When the soil has been stirred it remains damper.

When there is air in the soil, the pods can grow better underground, because they will find underground the air they need.