169 results for group: agrogeology-2
Basalt Rock Dust Amendment on Soil Health Properties and Inorganic Nutrients—Laboratory and Field Study at Two Organic Farm Soils in New England, USA
Justin B. Richardson
ABSTRACT:
Basalt rock dust (RD) is a rock quarry byproduct that may improve soil health in organic farming systems. RD was applied at two contrasting organic farms (the no-till VT-Farm in Thetford, Vermont, and the tilled MA-Farm in Barre, Massachusetts) and in soil batch reactors to investigate the impacts of basalt RD applications (6.7 tons ha−1) on physical and chemical soil health properties. Triplicate soil pits at two fields (RD and no RD) at each farm were sampled down between 80 to 110 cm depths in 2020. Median coarse (>2 mm) and very coarse aggregates (>50 mm) increased by 15% to 25%, and soil organic carbon ...
Soil physicochemical data at Two New England Farms with and without Basalt Rock Dust Application
Justin Richardson
ABSTRACT:
Soil physical and chemical data were collected from Cedar Circle Farm and Education Center in Thetford Vermont and Many Hands Farm in Barre, Massachusetts collected in Spring 2021. At each farm, two field were sampled. One with basalt rock dust application of 1.1 tonnes per hectare and an adjacent field without. Included in this data set are CSV files of: 1) ‘pH’ = Soil pH data for each soil horizon averaged for the three soil pit replicates 2) ‘Texture’ = Soil Texture for select horizons averaged for the three soil pit replicates 3) ‘SOC’ = Soil organic carbon concentrations and pool data for each soil ...
The combination of crushed rock and organic matter enhances the capture of inorganic carbon in tropical soils
F. P. Medeiros, S. H. Theodoro, A. M. X. Carvalho, V. S. Oliveira, L. C. Oliveira
ABSTRACT:
The use of remineralizers (REM) derived from crushed rocks has become an important option to ensure soil fertility and food and nutritional security, as well as a potential mechanism to capture CO2 efficiently, helping to mitigate climate change. The objective of this article is to present the direct and indirect effects of the use of REM in carbon capture processes through accelerated rock weathering. The tests were carried out in leaching columns where a type of rock (R), characterized as kamafugite, was used at a dosage equivalent to 40 t ha-1 incorp...
The potential for glacial flour to impact soil fertility, crop yield and nutrition in mountain regions
Sarah Tingey, Jemma L. Wadham, Jonathan Telling, Shannon Flynn, Jonathan R. Hawkings
ABSTRACT:
Novel sustainable agricultural strategies that enhance soil nutrients and human nutrition are crucial for meeting global food production needs. Here, we evaluate the potential of "glacial flour," a naturally crushed rock produced by glaciers known to be rich in nutrients (P, K, and micronutrients) needed for plant growth. Our proof-of-concept study, investigated soybean (<i>Glycine max.</i> var. Black jet) growth, yield, and nutrient content with soil supplementation from glacial flour sourced from Himalayan glaciers (meta-sediment gneiss ...
GEMAS: Boron as a geochemical proxy for weathering of European agricultural soil
Philippe Négrel, Anna Ladenberger, Alecos Demetriades, Clemens Reimann, Manfred Birke, Martiya Sadeghi
ABSTRACT:
About a century ago, B was recognised as an essential element for the normal growth of plants and terrestrial organisms. Limitations for plant development have been recognised in agricultural systems, particularly in highly weathered soil. Boron is rarely analysed in whole rock or soil analysis, as it requires specific analytical techniques. It is often determined, after partial extraction (aqua regia or CaCl), usually on a limited number of samples. Many more questions than answers exist about the environmental behaviour of B. We ...
Origin of the silicic volcanic rocks of the Early Permian Panjal Traps, Kashmir, India
J. Gregory Shellnutt, Ghulam M. Bhat, Kuo-Lung Wang, Michael E. Brookfield, Jaroslav Dostal, Bor-Ming Jahn
ABSTRACT:
The Panjal Traps of Kashmir, India represent a significant outpouring of mafic and silicic volcanic rocks during the Early Permian and are synchronous with the opening of the Neotethys Ocean. Previous studies have suggested that the silicic volcanic rocks are derived by differentiation of mafic magmas. Dacites and rhyolites collected from the lower portions of the volcanic pile near Pampore, Kashmir are peraluminous (ANCK>1.0) in composition. Their calculated whole rock ISr values are variable (ISr=0.69307 to 0.71825) and ...
Multiple mantle sources of the Early Permian Panjal Traps, Kashmir, India
J. Gregory Shellnutt, Ghulam M. Bhat,Kuo-Lung Wang, Meng-Wan Yeh, Michael E. Brookfield, Bor-ming Jahn
ABSTRACT:
The Early Permian Panjal Traps of northern India are the volcanic remnants of continental rifting that led to the formation of the Neotethys Ocean and the ribbon-like continent Cimmeria. The Traps are one of at least five major mafic eruptions of flood basalts during the Late Palaeozoic however their origin and petrogenesis are poorly constrained. Basalts from the Kashmir Valley were collected and analyzed for chemical and isotopic (Sr, Nd) compositions in order to characterize their mantle source and evaluate the petrogenetic ...
Residual effects of direct application of Burkina Faso phosphate rock on rice cultivation in Ghana
ABSTRACT:
Soil phosphorus deficiency is a critical constraint in crop production in Sub-Saharan Africa (SSA). Although phosphate rock (PR) deposits have been found in the region, they have not been well-utilised due to low reactivity, limited markets, lack of effective extension systems and other factors. However, previous studies indicate that direct application of these PRs are effective for lowland rice cultivation, although the residual effects of this application on rice yields have not been fully examined. We research the residual effects of PR direct application on rice yields in two typical agro-ecological zones for lowland rice cultivation ...
Applying minerals to soil to draw down atmospheric carbon dioxide through synergistic organic and inorganic pathways
ABSTRACT:
Minerals in soil can sequester atmospheric carbon dioxide through natural organic and inorganic processes. Here we consider three soil- and mineral-based methods for carbon dioxide removal: (1) grinding and spreading of calcium- and magnesium-rich silicate rocks for enhanced rock weathering and subsequent inorganic carbon formation, (2) mineral doping of biomass prior to conversion into biochar for enhanced biochar carbon yield and stability, and (3) strategic application of minerals to soil to increase soil organic carbon accrual and stability. We argue that there are powerful synergies between these approaches for carbon dioxide removal ...
