M. A. Johnston

The effect of soil compaction and soil physical properties on the mechanical resistance of South African forestry soils

C. W. Smith, M. A. Johnston, Simon Lorentz · Geoderma · 1997 · 130 citations

Soil Property, Soil Compaction, Engineering +9

Assessing the compaction susceptibility of South African forestry soils. II. Soil properties affecting compactibility and compressibility

C. W. Smith, M. A. Johnston, Simon Lorentz · Soil and Tillage Research · 1997 · 87 citations

Soil Property, Soil Compaction, Engineering +9

Assessing the compaction susceptibility of South African forestry soils. I. The effect of soil type, water content and applied pressure on uni-axial compaction

C. W. Smith, M. A. Johnston, Simon Lorentz · Soil and Tillage Research · 1997 · 76 citations

Soil Property, Soil Compaction, Engineering +8

The effect of soil compaction on the water retention characteristics of soils in forest plantations

C. W. Smith, M. A. Johnston, Simon Lorentz · South African Journal of Plant and Soil · 2001 · 53 citations · Full text

Available Water Capacity, Engineering, Forestry +16

Evaluation of Calibration Methods for Interpreting Soil Salinity from Electromagnetic Induction Measurements

M. A. Johnston, Michael J. Savage, J. H. Moolman et al. · Soil Science Society of America Journal · 1997 · 52 citations

Precision Agriculture, Environmental Monitoring, Engineering +16