indriyaiś ca mahotsavaiḥ
babhau bhūḥ pakva-śaṣyāḍhyā
kalābhyāṁ nitarāṁ hareḥ
The word āgrayaṇaiḥ refers to a particular authorized Vedic sacrifice, and the word indriyaiḥ refers to folk ceremonies that have somewhat worldly objectives.
Śrīla Prabhupāda comments as follows: “During autumn, the fields become filled with ripened grains. At that time, the people become happy over the harvest and observe various ceremonies, such as Navanna, the offering of new grains to the Supreme Personality of Godhead. The new grains are first offered to the Deities in various temples, and all are invited to take sweet rice made of these new grains. There are other religious ceremonies and methods of worship, particularly in Bengal, where the greatest of all such ceremonies is held, called Durgā-pūjā.”