1. Department of Soil Science, Punjab Agricultural University, Ludhiana, India;
2. Department of Agronomy, Sardar Vallabbhai Patel University of Agriculture and Technology, Meerut, India;
3. Department of Agricultural Chemistry and Soil Science, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, West Bengal, India;
4. University of Nevada Cooperative Extension, Fallon, NV, USA;
5. Research Station Developments, Borlaug Institute for South Asia, CIMMYT, New Delhi, India;
6. Department of Crop, Soil and Environment Sciences, Auburn University, Auburn, AL, USA;
7. Department of Soil and Water Conservation, Government of Punjab, Punjab, India