What is "agnikaryam"

Agnikaryam is the Yajna performed in a loukika agni (worldly fire) by brahmacharis (celibate bachelors). The Agnikarya is performed with the help of Samits or small wooden sticks or twigs usually of Arali (Ficus Religiosa) tree. This homa is performed daily twice: once in the morning and again in the evening. These two are respectively called Pratah Agnikaryam and Sayam Agnikaryam. Agnikaryam is also known as Samidadhanam. The method and mantras of performing the Agnikaryam are different for Rigveda and Yajurveda.