1. The influence of soil structure and air content on gas diffusion in soils;Bakker;Neth. J. Agric. Sci.,1970
2. Effects of different methods of cultivation and direct drilling, and disposal of straw residues, on populations of earthworms;Barnes;J. Soil Sci.,1979
3. Physical and chemical analyses of <2 mm samples;Bascomb,1974
4. Some influences of zero-tillage on the structure and stability of a fine textured river levee soil;Boone;Neth. J. Agric. Sci.,1976
5. The effect of entrapped air and optically oriented clay on aggregate breakdown and soil consistence;Brewer;Aust. J. Appl. Sci.,1956