Soil compaction affects soil physical properties through increasing soil bulk density, changing the pore size distribution as well as the pores’ tortuosity and connectivity, decreasing water infiltration into the soil and air permeability and soil aeration, increasing soil mechanical resistance and modifying the soil structure. As a result of soil compaction, longitudinal root growth is intensively reduced or even stopped when encountering compacted layers and hard pans. Hence, it reduces water and nutrition uptake by the plants and consequently the crop yields are reduced. In addition to intrinsic properties (e.g. texture) and physical properties (e.g. water content and bulk density) of soil, machine-related factors such as axle load, tire size and pressure, effectively influences the soil compaction. In sugarcane farms, soil compaction phenomenon is considerable and remarkable. Soil compaction in sugarcane farms occurs mainly due to mechanized operations during intensive crop production by using very heavy machinery. The highest stresses are induced in the soil by large harvesters and haulout equipments which are heavy and have low soil-tire contact area and high inflation pressure. Among the parameters used for evaluation of soil compactibility, pre-compaction stress ( ? pc ) and deformability coefficient ( C D ) are very useful. They are used as the stress threshold for soil compaction and the soil sensitivity to irreversible compaction (when the applied stresses due to the field traffic exceed the ? pc ), respectively. The objectives of this research were: (a) to determine ? pc and C D of soils with different textures under different planting conditions (fallow, plant crop, first ratoon crop and second ratoon crop) and (b) to derive pedo-transfer functions (PTFs) for estimating soil ? pc and C D using easily-available soil properties. In order to achieve the objectives, three different plate sinkage tests (PST) including 20-mm sinkage loading, constant cycling loading and staircase loading were concurrently conducted in each soil texture; while soil water content, bulk density and cone index were measured simultaneously. Results showed that the PST can be used to estimate the load bearing capacity of the soil. The soil compression curves (vertical stress vs. sinkage) showed two major soil groups: (a) soils with specific load bearing capacity and (b) soils sensitive to compaction or with very low load bearing capacity. In fields which were under planting, the effect of soil texture on ? pc was significant but the effect of measuring depth (topsoil or subsoil) and their interaction were not significant. Therefore, if the soil loosening effects after crop plant or crop ratoon were similar, load bearing capacity of the soils would depend on soil texture regardless of