The Zhongyuan oilfield in Henan has polluted over 1,700 hectares of adjacent farmland, according to a preliminary calculation by Henan Agricultural University in 2002.
根据河南农业大学2002年的初步计算,中原油田污染了附近1700多公顷的农田。
The studies were carried out in the Scientific & Educational Park of Henan Agricultural University in 2005~2007.