181 results for group: agriculture-1

The Theoretical Potential of Hondsrug Glacial Rock Dust as Soil Remediator in The Netherlands

Niels Christian Olfert Abstract Agriculture in the Netherlands is a major source of ammonia (NH3) emissions. Deposited nitrogen levels in the Netherlands reached 2-3 times their critical value at the start of 2020. Excess nitrogen in soil may cause declines in biodiversity and ecosystemic disequilibrium. This may lead to acidic and decalcified soils that are less capable of retaining nutrients. The mineral fines in rock dust are proven agents in soil remediation and remineralization. Glacial moraine deposits are a branded source of rock dust and are contained in the glacial till of the “Hondsrug” area, a boulder clay ridge in the northeast...

Potential accumulation of toxic trace elements in soils during enhanced rock weathering

Xavier Dupla, Benjamin Möller, Philippe C. Baveye, Stéphanie Grand Abstract Terrestrial enhanced rock weathering (ERW) is a carbon dioxide removal technology that aims at accelerating one of the most powerful negative feedbacks on Earth's climate, the chemical weathering of silicates. To achieve this, ERW proposes to spread ground silicate rock on agricultural soils. According to many models, global application rates of 40 tonnes of ground basaltic rock per hectare and per year would be necessary to sequester a significant amount of CO2, representing up to 24% of the current net annual increase in atmospheric CO2. When assessing the viabil...

Assessment of the enhanced weathering potential of different silicate minerals to improve soil quality and sequester CO2

Emily Pas, Mathilde Hagens, Rob Comans Abstract Enhanced weathering is a negative emission technology that involves the spread of crushed silicate minerals and rocks on land and water. When applied to agricultural soils, the resulting increase in soil pH and release of nutrients may co-benefit plant productivity. Silicate minerals and rocks differ in their enhanced weathering potential, i.e., their potential for both carbon dioxide (CO2) sequestration and soil quality improvements. However, studies comparing silicate minerals and rocks for this dual potential are lacking. Therefore, we compared the enhanced weathering potential of olivine ...

Impacts of dissolved phosphorus and soil-mineral-fluid interactions on CO2 removal through enhanced weathering of wollastonite in soils

Cameron Wood, Anna L.Harrison, Ian M.Power The weathering of silicate minerals removes carbon dioxide (CO2) from the atmosphere over geologic timescales and is also investigated as an engineered strategy to mitigate climate change on decadal timescales. “Enhanced rock weathering” (ERW) is a carbon dioxide removal strategy that involves spreading of pulverized, highly reactive silicate rock at the Earth's surface such as within agricultural and natural soils. The rate and efficacy of ERW in agricultural soils to remove CO2 is difficult to quantify owing to the complex geochemical environment including biological-mineral-fluid-atmosphere intera...

Remineralizing soils? The agricultural usage of silicate rock powders: A review

Philipp Swoboda, Thomas F. Döring, Martin Hamer Abstract Soil nutrient depletion threatens global food security and has been seriously underestimated for potassium(K) and several micronutrients. This is particularly the case for highly weathered soils in tropical countries, where classical soluble fertilizers are often not affordable or not accessible. One way to replenish macro- and micronutrients are ground silicate rock powders (SRPs). Rock forming silicate minerals contain most nutrients essential for higher plants, yet slow and inconsistent weathering rates have restricted their use in the past. Recent findings, however, challenge past ...

Increasing negative charge and nutrient contents of a highly weathered soil using basalt and rice husk to promote cocoa growth under field conditions

Markus Anda J. Shamshuddin C.I. Fauziah Abstract Technology intervention is a key success to restore properties and productivities of a highly weathered soil (Oxisols). The main challenge is to find materials with the ability to generate soil negative charge, release various nutrients and suppress toxic elements. The objective of this study was to increase negative charge and nutrient content, and suppress Al and Mn toxicities of an Oxisol using finely ground basalt and rice husk compost (RHC) to promote cocoa growth under field conditions. Factorial field experiment of 4 × 4 used finely ground basalt and rice husk compost and arranged in a ...

Organic acids and high soil CO2 drive intense chemical weathering of Hawaiian basalts: Insights from reactive transport models

Alida Perez-Fodich, Louis A. Derry Abstract We have investigated how biota contributes to rapid chemical weathering of Hawaiian basalts using a reactive transport model and chemical data from a soil chronosequence. These Hawaiian soils have developed under a tropical forest with rainfall >200 cm/yr and exhibit extensive weathering on timescales of 104 years. We developed a series of multicomponent reactive transport models to examine the role of soil respiration and low molecular weight organic acids in generating these intense weathering patterns. The base model starts with a 1-m basaltic porous media reacting with a fluid of rainwater ...

Temperature dependence of basalt weathering

Gaojun Li, Jens Hartmann, Louis A.Derry, A.Joshua West, Chen-Feng You, Xiaoyong Long, Tao Zhan, Laifeng Li, Gen Li, Wenhong Qiu, Tao Li, Lianwen Liu, Yang Chen, Junfeng Ji, Liang Zhao, Jun Chen Abstract The homeostatic balance of Earth's long-term carbon cycle and the equable state of Earth's climate are maintained by negative feedbacks between the levels of atmospheric CO2 and the chemical weathering rate of silicate rocks. Though clearly demonstrated by well-controlled laboratory dissolution experiments, the temperature dependence of silicate weathering rates, hypothesized to play a central role in these weathering feedbacks, has been diffic...

Second crop of corn with micaxisto remineralizer in consortium with organic fertilizer

The objective of the present work was to use the mica shale remineralizer in consortium with organic fertilizer for corn culture implanted in the Brazilian Midwest region. The experiment was carried out in the second harvest of the 2020 agricultural year, at Fazenda Panamá, Municipality of Itumbiara, state of Goiás, in the no-tillage system on soybean ridge, implemented by the Center for Study and Research in Plant Science. The location presents as coordinates geographical areas, 17 ° 58 'S latitude and 45 ° 22' W longitude and 554 m altitude. The agronomic characteristics "plant biometrics" evaluated were, the population of plants, performed ...

Physiological changes in soybean cultivated with soil remineralizer in the Cerrado under variable water regimes

Lucas Felisberto Pereira, Walter Quadros Ribeiro Junior, Maria Lucrécia Gerosa Ramos, Nicolas Zendonadi dos Santos, Guilherme Filgueiras Soares, Raphael Augusto das Chagas Noqueli Casari, Onno Muller, Cássio Jardim Tavares, Éder de Souza Martins, Uwe Rascher, Cristiane Andréa de Lima Guimarães, André Ferreira Pereira, Liliane Márcia Mertz-Henning, Carlos Antonio Ferreira de Sousa Abstract The objective of this work was to evaluate the influence of the soil remineralizer fine-graded mica schist (FMS) on soybean (Glycine max) physiology, yield, and grain quality under different water regimes (WRs) in the Brazilian Cerrado. The experiment ...