The goals of this research were: 1.

From this visit I gained: 1. A good overview of the state of agricultural soil mechanics worldwide. I was struck by the lack of direction and novelty in some of the work in this field.

This project had objectives of: 1 studying the risk of damaging soil, and by how much, by tillage and traffic at various moisture contents; 2 testing funher the 11critical moisture" concept developed under a prev

Obviously, avoiding trafficking wet soil is one means of avoiding soil structural damage. Another is to use a vehicle with lower ground pressure, by using dual tyres, wide tracks, etc.

We have conducted a series of experiments at Trangie, Warren, Narrabri and Moree to examine the use of shallow leading tines in conjunction with rippers. Ripper depths of 300, 450 and 600 mm have been investigated.