1. Total porosity and random roughness of the interrow zone as influenced by tillage;Allmaras,1966
2. New methods for determining the micro-topography and height changes of the soil surface and the porosity of the plough layer;Andersson;Grundförbättring,1963
3. Structure dynamics in the topsoil. A field study;Andersson;Grundförbättring,1966
4. Determination of the volume relationship in the different layers of the topsoil;Andersson,1967
5. Topsoil reaction to mechanical pressure;Bertilsson;Swed. J. Agric. Res.,1971