1. Department of Soil Science & Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, India
2. Department of Soil Science & Agricultural Chemistry, ICAR - Krishi Vigyan Kendra (KVK), Tiruppur, India
3. Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, India
4. Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore, India