This book is for those who are seriously engaged in the problems of tillage. Mechanical tillage plays a very important role in shaping the harvest on all soil types under normal weather conditions. The preparation of soil with specified properties (characteristics) depending on arable crops has always been a significant problem. The task of preparing soil can be solved by many types (sorts) of working bodies, tools and traction machines, and in the future by a direct effect on the soil of various types of radiation: thermal, acoustic, microwave, etc. Which technology should be chosen, which method of tillage soil will be used? The answer is always clear: the technologies, tools or machines that provide maximum efficiency will be applied. The most effective way to improve the use of soil, to apply the most effective technologies nowadays, to develop new tools and aggregates is economic and mathematical modelling.