Comparing volcanic glass shards in unfertilised and fertilised Andisols derived from rhyolitic tephras, New Zealand: Evidence for accelerated weathering and implications for land management

Abstract

Schnug, E. 2016. Comparing volcanic glass shards in unfertilised and fertilised Andisols derived from rhyolitic tephras, New Zealand: evidence for accelerated weathering and implications for land management. Geoderma 271, 91-98. http://dx. Highlights We examined glass shards from two Andisols of different age and fertilizer history  The average sizes and angularities of the glass shards decreased with soil age  The shard size and angularity decreases were more marked in the fertilized soils  Additions of phosphatic, F-containing fertilizer had enhanced the glass dissolution AbstractEnhanced weathering associated with the use of phosphate fertilizers has been identified in some of the major farming areas of New Zealand and an evaluation of its effects on soil properties and the implications for soil management are needed. We assessed changes in the

Soil horizon variation: A review

“…The consequent changes included increased soil carbon, darker soil color, lower pH, and increased organic forms of active Al. In New Zealand, the application of fertilizer containing fluorine resulted in increased rates of chemical weathering of parent materials (predominantly volcanic glass) within less than a century (Taylor et al, 2016).…”

Tropical Andosol organic carbon quality and degradability in relation to soil geochemistry as affected by land use

“…Land use, through its control on vegetation, can impact the weathering process by modifying the pH, influencing soil biological activity and nutrient levels, and releasing organic complexing compounds (Van Breemen et al, 1983;Cronan, 2018). On agricultural lands, moreover, fertilizer addition and soil disturbance caused by tillage have also been reported to significantly enhance weathering (Churchman and Lowe, 2012;Li et al, 2021;Taylor et al, 2016). While an extensive and still-growing number of studies considered land use impacts on SOC stock and soil OM quality and its degradability (Covaleda et al, 2011;Cusack et al, 2013;Huygens et al, 2005), just very few have considered the potential indirect impact of land use on SOC stability through its effect on the geochemical properties.…”