1. ABC, 2012. The agricultural budgeting & costing book. Agro-Business Consultants, 75th ed. 481 p.
2. Ahodo, K., 2012. Economics of Potato irrigation in the UK. MSc Thesis, School of Applied Sciences, Cranfield University. 106 p.
3. Amosson, S.H., Almas, L., Marek, T., Kenny, N., Guerrero, B., Girase, J.R., et al., 2011. Economics of irrigation systems. B-6113 Agrilife Extension, Texax A&M System. 14 p.
4. Asby, C., Renwick, A., 2000. Economics of cereal production 1998/99. University of Cambridge: Special Studies in Agricultural Economics, Report No. 48. 99 p.
5. Yield and yield components response of wheat (Triticum aestivum L.) genotypes tinder different soil water deficit conditions;Ashraf;Acta Agron. Hung,1998