For Colorado ranchers and producers, productivity stems from the soil. In the face of growing water scarcity and climate ...

Compaction increases the bulk density (weight per volume) of soil. A higher bulk density means less porosity (space between soil particles), which affects aeration. The finer-textured silts and clays ...

AASHTO R47-23 Reducing Samples of Hot Mix Asphalt (HMA) to Testing Size Exempt if qualified in Asphalt Module, taken within one year (doesn't apply for written exam) AASHTO T310-22 In-Place Density ...