Fields having are used to sow groundnuts and castor.

The correct option is B red soil
Farmers in Dokur grow a variety of crops based on the type of soil present. Fields having red soil are used for the sowing of groundnuts and castor. Cotton grows well on black soil. Bajra or sajjalu is grown using chavudu nelalu (loamy soil). Crops like red gram and alasandalu or pigeon pea are mostly grown in patches, along with other crops in different soil fields.