HARTFORD, Conn. — A study by researchers at the University of Connecticut has concluded that the agriculture industry’s impact on the state economy is worth between $3.3 billion and $4 billion.

The researchers at the school’s Zwick Center for Food and Resource Policy say that is slightly down from when a similar analysis was done in 2010.

They say the contraction owes to a movement toward specialty crops and some decline in traditional sectors such as tobacco farming.

The industry accounts for some 21,000 jobs in the state.

The study says farmland also accounts for nearly 14 percent of all the land in the state. Forests cover more than half of the state.