45   After the new grains were cut and brought home from the paddy fields, the people began to observe the navānna ceremony everywhere, in the presence of the Lord as Śrī Kṛṣṇa and Baladeva.
According to Vedic culture, learned men consider all natural products, such as food grains, fruits, flowers, and milk, to be God-sent. No one can manufacture these things in manmade factories, however scientifically advanced people may be. People can make preparations of such God-sent foodstuffs, but they cannot manufacture the natural ingredients. Spiritually cultured men, therefore, feel obliged to the Lord when they get sufficient natural foodstuffs by the grace of the Lord.
The  navānna prāśana  ceremony is observed as a way of acknowledging the gifts of God. Newly collected grains would first be offered to the Lord by the villagers, either individually or collectively, and in either case all the members of the village would partake of the  prasādam  thus offered to the Lord. Such ceremonies make the people happy and prosperous.
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