The deceased is Rita Kumari Sharma, 22, wife of Lal Bihari Sharma of Laxminiya -8, said District Police Office Mahottari.
Her body was found in a dilapidated condition at the nearby sugarcane farm of Devendra Chaudhary on Saturday morning, police said.
Her husband is in Qatar for employment and his two wives Phoolkumari and Rita were living together.
Rita had left home after a quarrel with Phoolkumari eight days ago, and might have been murdered, police said, and informed that investigation was on.