1. a Department of Microbiology, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, India;
2. b Department of Soil Science, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, India;
3. c Department of Plant Physiology, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, India;
4. d Project Coordinator Micronutrients Unit, Indian Institute of Soil Science, Berasia Road, Bhopal, India