1. The effect of soil compaction on soil structure and crop yields;Eriksson;Swedish Institute of Agricultural Engineering Bulletin,1974
2. Compaction by agricultural vehicles: A review, III. Incidence and control of compaction in crop production;Soane;Soil and Tillage Research,1982
3. Some effects of machinery traffic on grass yield;Frost,1985
4. Compaction by agricultural vehicles: A review, II. Compaction under tyres and other running gear;Soane;Soil and Tillage Research,1981
5. The causes and nature of soil damage;Spoor;The Agricultural Engineer,1982