śūdrasyāpi svabhāva-jam

krsi-ploughing; go-cows; raksya-protection; vanijyam-trade; vaisya-vaisya; karma-duty; svabhava-jam-born of his own nature; paricarya-service; atmakam-nature; karma-duty; sudrasya-of the sudra; api-also; svabhava-jam-born of his own nature.