This manuscript describes the natural soil amendments used in agriculture, which are
divided into three groups: organic, organic-mineral, and mineral amendments. It also …

At the Earth's surface, calcium (Ca) is a critical element at a variety of scales: it is soluble in
natural waters, a biological nutrient, and a major constituent of the dominant mineral sink for …

Anthropogenic nitrogen (N) deposition has accelerated terrestrial N cycling at regional and
global scales, causing nutrient imbalance in many natural and seminatural ecosystems …

Enhanced weathering (EW) is one of the most promising negative emissions technologies
urgently needed to limit global warming to at least below 2° C, a goal recently reaffirmed at …

Trees, the most successful biological power plants on earth, build and plumb the critical
zone (CZ) in ways that we do not yet understand. To encourage exploration of the character …

Forest decline in the northeastern United States has been linked to the effects of acid
deposition on soil nutrients. To test this link, we added a calcium silicate mineral to a paired …

Grasslands can significantly contribute to climate mitigation. However, recent trends indicate
that human activities have switched their net cooling effect to a warming effect due to …

We review the mechanisms of deleterious nitrogen (N) deposition impacts on temperate
forests, with a particular focus on trees and lichens. Elevated anthropogenic N deposition to …

Cross-site syntheses of litter decomposition studies have shown that litter calcium (Ca)
concentration may have a role in controlling the extent of decomposition of tree foliage. We …

A beautifully illustrated overview and synthesis of how scientists have used a living forest as
an experimental laboratory for more than 50 years For more than 50 years, the Hubbard …