One of two main craters on Alaska’s Mount Spurr, shown in 1991. Earthquake activity suggests the volcano is close to erupting again in 2025. (Photo by R.G. McGimsey/Alaska Volcano Observatory/U.S.

Design your raised bed garden layout to maximize sunlight and layer with a ground cloth, limestone, sand, organic matter, and garden soil. Gardening in raised beds requires less equipment compared ...

Compared to rotary tillage-no-tillage (RT-NT), the BD of the 0–40 cm soil layer decreased under the other treatments during 2018–2019. The C component content decreased with soil depth across all ...

The specific methods employed for soil sampling were as follows: Initially, the 0-5 cm topsoil was removed, and samples from the surface soil layer (5-25 cm ... revealed distinct compositions and ...

When volcanoes like Alaska’s Mount Spurr erupt, the ash can damage people’s lungs, smother crops and kill animals, and the ...