Knowledge Engineering for an Expert System on Wheat Crop Management - S. N. Islam; K. K. Chaturvedi; Hari Om Agarwal; M. S. Farooqi; Kirti Sharma; Adesh K. Sharma; Randhir Singh; R. K. Sharma; H. S. Sikarwar (Proceedings of the 3rd Indian International Conference on Artificial Intelligence, Pune, India, December 17-19, 2007, 2007)