Load-bearing processes in agricultural wheel-soil systems

In soil dynamics we distinguish between loosening and loadbearing processes. Load-bearing processes which can occur under agricultural rollers, wheels, and tyres are dealt with In this dissertation.We classify rollers, wheels, and tyres and treat some general aspects of these devices. Fundamentals of load-bearing processes, I.e. kinematic, dynamic, and soil physical aspects are discussed also.Not only soil characteristics concerning load-bearing processes are dealt with but also the suitability of these characteristics for use In prediction methods. Special attention has been paid to predicting some process aspects of a towed tyre under different soil conditions and In different soil types. Under laboratory conditions the use of characterizing processes (cone, vane, and failing weight) and empirical prediction methods resulted In accurate predictions of rolling resistance, rut depth, and compaction caused by a towed tyre