All neurons can produce chemical impulses and have within them an axon hillock that decides if the impulse will be produced or not. Learn how this dynamic processing center uses incoming signals from other neurons to make its decision.
The land form that would be best for farming would depend on what you're farming. The best type of land for farming crops would be flatland - or plains. In the south the area used for farming is the Piedmont area, the area between the hills and the coastal plains. The land form that would be best for farming would depend on what you're farming.
If your problem is in your fields, and you do not have any major contour ploughing will probably best. It is a very effective and common method of farming on hills. Terracing will be a good method for large operations if you are able to afford the costs. Remember to grass the backs of each terrace to prevent erosion here.