kṛṣṇa-pada-arcana - worshiping the lotus feet of Kṛṣṇa; haya - is; dvāparera - of Dvāpara millennium; dharma - the occupational duty; kṛṣṇa-varṇe - in a blackish color; karāya - induces; loke - to the people; kṛṣṇa-arcana-karma - the activities of worshiping Lord Kṛṣṇa.

“In Dvāpara-yuga the people’s occupational duty was to worship the lotus feet of Kṛṣṇa. Therefore Lord Kṛṣṇa, appearing in a blackish body, personally induced people to worship Him.