166 results for group: agrogeology-2
Enhancement of Biochar Carbon Sequestration Through Mineral Regulation: Effects and Mechanisms
Fan Yang, Pengxiao Gao, Lin Chi, Zhongyu Gao, Yajun Wang, Liu Luo, Bo Liu, Xinyue Liu, Jingke Sima
ABSTRACT:
The conversion of waste biomass into biochar through inert pyrolysis represents a promising strategy for carbon sequestration. However, biochar production is often accompanied by the release of small molecular chemical substances during pyrolysis, and the resulting biochar is susceptible to environmental degradation. To enhance the carbon retention rate of biochar during pyrolysis and its stability in the environment, this study explored the incorporation of various metal soluble salts (CaCl2, Ca(H2PO4)2, MgCl2, FeCl3) and clay minerals ...
Long-term trends of streamwater chemistry in an agricultural watershed: Effects of anthropogenic and climatic factors
Fengchao Sun, Rob A. Rioux, William A. Miller-Brown, Bibek Shrestha, James B. Shanley, Noah J. Planavsky, Peter A. Raymond, James E. Saiers
ABSTRACT:
The chemistry of headwater streams is a key indicator of the health of riparian zones and surrounding terrestrial ecosystems. This chemistry is shaped by biogeochemical processes, including chemical weathering, and anthropogenic activities that interact with one another and are sensitive to climate. Elucidating trends in streamwater chemistry and the drivers that underpin them is essential for informing land-management decisions and anticipating water-quality issues that may affect downstream ...
Supplementing Enhanced Weathering With Organic Amendments Accelerates the Net Climate Benefit of Soil Amendments in Rangeland Soils
Tyler L. Anthony, Andrew R. Jones, Whendee L. Silver
ABSTRACT:
Carbon dioxide (CO2) removal (carbon dioxide removal (CDR)) that combines decreased greenhouse gas emissions with atmospheric CO2 reduction is needed to limit climate change. Enhanced rock weathering (ERW) of ground silicate minerals is an emerging CDR technology with the potential to decrease atmospheric CO2. However, there are few multi-year field studies and considerable uncertainty in field-rates of ERW. We explored combining finely ground metabasaltic rock with other soil CDR technologies (compost and biochar amendments) to stimulate carbon (C) sequestration. The combined ground ...
Micronutrients and contaminants in the grazing and agricultural soils of Kashmir Valley, India
Ishfaq Mir
ABSTRACT:
Soil plays a critical role in determining the food nutrition at the base of the food chain, which makes it essential for food safety. This study demonstrates how micronutrient deficiencies and pollution from hazardous elements may affect crop productivity as well as human and animal health. In the Kashmir valley’s Bandipora-Ganderbal region, 200 top soils were examined to ascertain the toxicity risks and trace element deficiencies. With mean values of 44,759 ± 6072, 120 ± 23, 114 ± 18, 89 ± 22, 44 ± 8, 33 ± 7, 23 ± 4, 19 ± 4, and 11 ± 5 respectively, the concentrations (mg kg⁻¹) vary from Fe: 31,326 to 77,420, ...
Nature based solutions in soil restoration for improving agricultural productivity
Kancheti Mrunalini, Biswaranjan Behera, Somasundaram Jayaraman, Purushothaman Abhilash, Pradeep Dubey, G. Narayanaswamy, J.V.N.S Prasad, Kv Rao, Pandian Krishnan, Pratibha Gudapaty, Srinivasrao Ch
ABSTRACT:
Soil is a living and dynamic body, which is prone to degradation under conventional agricultural practices. Healthy soil is one of the most important pillars of sustainability as it delivers several ecosystem services along with its control on microbial activity, nutrient recycling, and decomposition. Nature-based solutions can play an important role in restoring soil quality for enhanced agricultural productivity and sustainabili...
The Use of Ground Rocks in Laterite Systems: An improvement to the use of Conventional Soluble Fertilizers?
Othon H. Leonardos, W. Fyfe, B. Kronberg
ABSTRACT:
The geochemistry of lateritic terrains is discussed in terms of nutrient demand in agriculture. The data presented show a dramatic depletion of virtually all nutrients when compared to crustal levels and other soil systems. Increasing world demand for food production, particularly in tropical countries where alcohol production is also needed, has forced the agriculture frontier deep into lateritic areas. As cultivation is intensified the laterite becomes more barren and a neutral recipient for the massive doses of nutrients that are to be constantly added if production is to continue. Conventi...
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...
