A. Nagaraju

Department of Geology, S V University, Tirupati, Andhra Pradesh, INDIA

K. Sunil Kumar

Department of Geology, S V University, Tirupati, Andhra Pradesh, INDIA

A. Thejaswi

Department of Environmental Sciences, Kakatiya University, Warangal, Andhra Pradesh, INDIA

Z. Sharifi

Department of Soil Science, College of Agriculture, University of Kurdistan, Sanandaj, IRAN