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Abstract:
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1) Introduction - 2) Literature review : causes of soil compaction ; Root growth in compacted soils ; Tillage and soil compaction ; Methods for sampling and measuring cereal roots ; Methods of measuring soil compaction ; Measurements of water use - 3) Paper 1 : Effect of different direct drilling and conventional sowing techniques on soil strength, root growth and grain yield of wheat on sandplain soils in Western Australia - 4) Paper 2 : A comparison of different seeding systems : the interaction of till
e and time of sowing on sandplain soils in Western Australia - 5) Paper 3 : Increasing the depth of soil disturbance increases yields of direct drilled wheat on the sandplain soils of Western Australia - 6) General discussion.
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