This is the fourth report in this series of reports on the revegetation of disturbed non-cultivated areas in Alberta. It presents a change in emphasis from the previous reports. The first three reports dealt mainly with the vegetation using the soil zones as boundaries for the different climatic regions in the province. Coarse textured soils were separated from the finer textured ones also. In this report an attempt has been made to relate the vegetation to a group of soil factors as well as climate and to examine the soil texture in more detail. The soil properties measured in the study were pH, conductivity, sulfate, free lime, organic matter, sodium; potassium, phosphorus, and texture. Objectives • To determine the effect of selected soil properties on plant communities and selected species. • To see what soil properties may be of value in revegetation studies and in planning revegetation projects. • To see to what extent these soil properties must be taken into account. That is, are they likely to be important in small localized areas only, or are they likely to be important over much larger areas?