Measurement of Soil Bulk Density and Moisture

ABSTRACT BULK density and moisture content of soil influence the soil conditions created by tillage, vehicle trafficability, soil compaction caused by vehicles, water infiltration and drainage, and crop growth. Measurement and description of soil conditions are necessary for correct management decisions to create soil conditions that will maximize short- and long-term crop production. Techniques for measurement of soil bulk density and soil moisture are reviewed and advantages and disadvantages of each method discussed. Although the physical properties of the surface layer of soil are very important, properties in that layer are the most difficult to measure. There are no quick, easy, and accurate methods for determination of soil bulk density or soil moisture content. However, there are several methods for each that may be used successfully.