Kati Bihu is a festival celebrated in Assam, which is located in northeastern India. It is one of the major festivals of the state and holds significant cultural and social importance.

Celebration of Kati Bihu:
Kati Bihu is celebrated in the month of 'Kati' according to the Assamese calendar, which falls in mid-October. The festival is mainly associated with agriculture and is observed by the farming community. It is also known as Kangali Bihu, which means the "festival of the poor" as it is celebrated during the lean period when the farmers face scarcity of resources.

Significance of Kati Bihu:
The festival is primarily focused on lighting earthen lamps or 'diyas' in various parts of the households and fields. The lamps are believed to ward off evil spirits and bring prosperity. It is also seen as a way to seek blessings for a good harvest and protection of the crops from pests and diseases. Additionally, Kati Bihu is a time to offer prayers and seek the blessings of deities for the well-being of the family and community.

Agricultural rituals and practices:
During Kati Bihu, farmers perform various rituals in their fields to ensure a bountiful harvest. They light lamps and perform 'Akash Banti' (sky lantern) ceremonies, where the lanterns are released into the sky. This practice is believed to bring good fortune and ward off insects and pests. Farmers also tie 'Tulsi' (holy basil) leaves to their crops to protect them from diseases. Additionally, some farmers place 'Bhelaghar' (miniature clay huts) in their fields to symbolize the protection of the crops.

Cultural activities and celebrations:
Apart from the agricultural aspect, Kati Bihu also involves cultural festivities. People gather in groups to perform traditional dances like Bihu, which is performed by both men and women. The Bihu dance is characterized by energetic movements and is accompanied by traditional musical instruments like the dhol (drum), pepa (hornpipe), and taal (cymbals). The dance is an expression of joy and is performed with great enthusiasm during the festival.

Conclusion:
Kati Bihu is a festival celebrated in Assam, primarily by the farming community. It holds immense cultural and agricultural significance, emphasizing the importance of the harvest and seeking blessings for prosperity. The festival is marked by various rituals, lighting of lamps, and cultural festivities like the Bihu dance.