DES MOINES, Iowa (AP) _ A $1.9 billion fertilizer plant under construction in southeast Iowa is asking for an additional $21.5 million in incentives from the state.

The Des Moines Register ( ) reports the Iowa Economic Development Authority Board will consider the request from the Iowa Fertilizer Company on Friday. It also includes additional sales use tax refund of $3.5 million.

According to board documents, approval of the request would bring the total amount of tax benefits the state has provided to the company to $107.5 million.

The construction of the plant near Wever is one of the largest economic development projects in state history.