Farmers in the country had sown kharif groundnut across 3.49 million ha as of Thursday, down 12.9% on year. In Gujarat, the largest producing state, groundnut acreage was 1.61 million ha, up 2.6% on year, following favorable rains in the state. However, a fall in area sown under groundnut seed in other key producing states of Andhra Pradesh and Karnataka, following deficit rains, pulled down overall acreage in the country.