1. Ashok Kumar A, Reddy BVS, Ramaiah B, Sahrawat KL, Pfeiffer WH (2013) Gene effects and heterosis for grain iron and zinc concentration in sorghum [Sorghum bicolor (L.) Moench]. Field Crops Res 146:86–95
2. Ashok Kumar A, Reddy BVS, Ramaiah B, Sahrawat KL, Pfeiffer WH (2012) Genetic variability and character association for grain iron and zinc contents in sorghum germplasm accessions and commercial cultivars. Eur J Plant Sci Biotechnol 6(Special Issue 1): 66–70 (Print ISSN 1752-3842)
3. ASG (2014) Agricultural Statistics at a Glance, Directorate of Economics and Statistics, Department of Agriculture, Cooperation and Farmer Welfare, Ministry of Agriculture and Farmer Welfare, Government of India
4. ASG (2015) Agricultural Statistics at a Glance, Directorate of Economics and Statistics, Department of Agriculture, Cooperation and Farmer Welfare, Ministry of Agriculture and Farmer Welfare, Government of India
5. Casley DJ, Kumar K (1992) The collection, analysis and use of monitoring and evaluation data. The World Bank, Washington