1. Soil and residue management effects on arable cropping conditions and nitrous oxide fluxes under controlled traffic in Scotland. 1. Soil and crop responses;Ball;Soil Till. Res.,1999
2. Crop performance and soil conditions on imperfectly drained loams after 20–25 years of conventional tillage or direct drilling;Ball;Soil Till. Res.,1994
3. British Standards Institution, 1990. British Standard Methods of test for soils for civil engineering purposes, BS 1377. British Standards Institution, London.
4. Relative measures of soil bulk density to characterise compaction in tillage systems on fine sandy loams;Carter;Can. J. Soil Sci.,1990
5. Culley, J.L.B., 1993. Density and compressibility. In: Carter, M.R. (Ed.), Soil Sampling and Methods of Analysis. Canadian Society of Soil Science, Lewis Publishers, CRC Press, Boca Raton, FL, pp. 529–539.