Staff members of the Tamil Nadu Agricultural University (TNAU) are carrying out research on Bt brinjal to study its impact on the soil, Agriculture Minister Veerapandi S Arumugham said on Thursday. Research is being conducted at seven agricultural universities in India on the basis of instructions from the Centre, the Indian Council of Agricultural Research (ICAR) and TNAU. The State Government is not directly involved in the project, he added. Terming the recent protest by some environmentalists and