1. A tillage bin and tool testing apparatus for turf samples;Baker;J. Agric. Eng. Res.,1969
2. A simple covering harrow for direct drilling;Baker;NZ Farmer,1970
3. Experiments relating to techniques for direct drilling of seeds into untilled dead turf;Baker;J. Agric. Eng. Res.,1976
4. Developments with seed drill coulters for direct drilling. I. Trash handling properties of coulters;Baker;NZ J. Exp. Agric.,1979
5. Developments with seed drill coulters for direct drilling. III. An improved chisel coulter with trash handling and fertiliser placement capabilities;Baker;NZ J. Exp. Agric.,1979