Global chemical weathering and associated P-release — The role of lithology, temperature and soil properties

Soil crust strength influences seedling emergence, penetration and morphology of plant roots, and, consequently, crop yields. A study was carried out to assess the role of different soil properties on crust strength atHisar, Haryana, India. The soil samples from 0-5 and 5-15 cm depths were collected from 21 locations from farmer’s fields, having a wide range of texture.Soil propertieswere evaluated in the laboratory and theirinfluence on the modulus of rupture (MOR), which is the measure of crust strength, was evaluated.The MOR of texturally different soils was significantly correlated with saturated hydraulic conductivity at both the depths. Dispersion ratio was found to decrease with an increase in fineness of the texture of soil and the lowest value was recorded in silty clay loam soil,which decreased with depth. The modulus of rupture was significantly negatively correlative with the dispersion ratio.There was no role of calcium carbonate in influencing the values of MOR of soils. Similarly,the influence of pH, EC and SAR of soil solution on MOR was non-significant.A perusal of thevalues of the correlations between MOR and different soil properties showed that the MOR of soils of Haryana are positively correlated with silt + clay (r = 0.805) followed by water-stable aggregates (r = 0.774), organic carbon (r = 0.738), silt (r = 0.711), mean weight diameter (r = 0.608) and clay (r = 0.593) while negatively correlated with dispersion ratio (r = - 0.872), sand (r = -0.801) and hydraulic conductivity (r = -0.752) of soils.

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The role of sulfur in chemical weathering and atmospheric CO2 fluxes: Evidence from major ions, δ13CDIC, and δ34SSO4 in rivers of the Canadian Cordillera

Geochimica et Cosmochimica Acta ◽

10.1016/j.gca.2005.07.011 ◽

2005 ◽

Vol 69 (23) ◽

pp. 5441-5458 ◽

Cited By ~ 125

Author(s):

Jody Spence ◽

Kevin Telmer

Keyword(s):

Chemical Weathering ◽

Major Ions ◽

Atmospheric Co2 ◽

Canadian Cordillera ◽

Co2 Fluxes

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Role of Nano-Silica in Amelioration Salt Stress Effect on some Soil Properties, Anatomical Structure and Productivity of Faba Bean (Vicia faba L.) and Maize (Zea mays L.) Plants

Journal of Plant Production ◽

10.21608/jpp.2018.36610 ◽

2018 ◽

Vol 9 (11) ◽

pp. 955-964

Author(s):

F. El- Emary ◽

M. Amer

Keyword(s):

Zea Mays ◽

Salt Stress ◽

Soil Properties ◽

Faba Bean ◽

Zea Mays L ◽

Anatomical Structure ◽

Stress Effect ◽

Nano Silica ◽

Vicia Faba L

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Características e propriedades dos solos relevantes para os estudos pedológicos e análise dos processos erosivos

Anuário do Instituto de Geociências - UFRJ ◽

10.11137/1996_0_93-114 ◽

1996 ◽

Vol 19 ◽

pp. 93-114

Author(s):

Antonio José Teixeira Guerra ◽

Rosangela Garrido Machado Botelho

Keyword(s):

Soil Erosion ◽

Soil Properties ◽

Environmental Impacts ◽

Soil Formation ◽

Soil Characteristics ◽

Erosion Processes ◽

Main Factors ◽

Factors Of Soil Formation

This paper regards the role of soil characteristics and properties on pedological surveys and soil erosion investigations. Therefore, the main factors of soil formation are here discussed. Furthermore, the main chemical and physical soil properties are also taken into consideration, in order to approach this subject. Finally, some erosion processes are also carried out, together with the main erosion forms and the environmental impacts caused by these associated processes.

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Cropmarks used in aerial archaeology as special spatial indicators of soil features potentially applicable in soil mapping

10.5194/egusphere-egu21-5204 ◽

2021 ◽

Author(s):

Mátyás Árvai ◽

Zoltán Czajlik ◽

János Mészáros ◽

Balázs Nagy ◽

László Pásztor

Keyword(s):

Soil Properties ◽

Auxiliary Information ◽

Cultivated Plants ◽

Soil Features ◽

Random Forest Models ◽

Kolmogorov Smirnov ◽

Using Data ◽

Definition Of ◽

New Research

<p>Cropmarks are a major factor in the effectiveness of traditional aerial archaeology. The positive and negative features shown up by cropmarks are the role of the different cultivated plants and the importance of precipitation and other elements of the physical environment. In co-operation with the experts of the E&#246;tv&#246;s Lor&#225;nd University a new research was initiated to compare the pedological features of cropmark plots (CMP) and non-cropmark plots (nCMP) in order to identify demonstrable differences between them. For this purpose, the spatial soil information on primary soil properties provided by DOSoReMI.hu was employed. To compensate for the inherent vagueness of spatial predictions, together with the fact that the definition of CMPs and nCMPs is somewhat indefinite, the comparisons were carried out using data-driven, statistical approaches. In the first round three pilot areas were investigated, where Chernozem and Meadow type soils proved to be correlated with the formation of cropmarks. Kolmogorov-Smirnov tests and Random Forest models showed a different relative predominance of pedological variables in each study area. The geomorphological differences between the study areas explain these variations satisfactorily. In the next round, the identified relationships between cropmarking and soil features are planned to be utilized in the spatial inference of soil properties, where crop-marking sites will represent a unique, spatially non-exhaustive auxiliary information.</p>

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Role of Groundwater-Borne Geogenic Phosphorus for the Internal P Release in Shallow Lakes

Water ◽

10.3390/w11091783 ◽

2019 ◽

Vol 11 (9) ◽

pp. 1783 ◽

Cited By ~ 3

Author(s):

Catharina S. Nisbeth ◽

Søren Jessen ◽

Ole Bennike ◽

Jacob Kidmose ◽

Kasper Reitzel

Keyword(s):

Lake Sediment ◽

Trophic State ◽

Driving Factor ◽

Original Source ◽

Depth Profiles ◽

P Release ◽

Order Of Magnitude ◽

The One ◽

Total P

This study explores the under-investigated issue of groundwater-borne geogenic phosphorus (P) as the potential driving factor behind accumulation of P in lake sediment. The annual internally released P load from the sediment of the shallow, hypereutrophic and groundwater-fed lake, Nørresø, Denmark, was quantified based on total P (TP) depth profiles. By comparing this load with previously determined external P loadings entering the lake throughout the year 2016–2017, it was evident that internal P release was the immediate controller of the trophic state of the lake. Nevertheless, by extrapolating back through the Holocene, assuming a groundwater P load corresponding to the one found at present time, the total groundwater P input to the lake was found to be in the same order of magnitude as the total deposit P in the lake sediment. This suggests that groundwater-transported P was the original source of the now internally cycled P. For many lakes, internal P cycling is the immediate controller of their trophic state. Yet, this does not take away the importance of the external and possibly geogenic origin of the P accumulating in lake sediments, and subsequently being released to the water column.

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INTEGRATING SCIENTIFIC AND LOCAL SOILS KNOWLEDGE TO EXAMINE OPTIONS BY CONTEXT INTERACTIONS FOR PHOSPHORUS ADDITION TO LEGUMES IN AN ANDEAN AGROECOSYSTEM

Experimental Agriculture ◽

10.1017/s0014479716000478 ◽

2016 ◽

Vol 55 (S1) ◽

pp. 145-168 ◽

Cited By ~ 3

Author(s):

STEVEN J. VANEK ◽

LAURIE E. DRINKWATER

Keyword(s):

Soil Properties ◽

Calcium Phosphates ◽

Percent Cover ◽

P Fertilization ◽

Farmer Knowledge ◽

Phosphorus Addition ◽

Erosion Risk ◽

Soil P ◽

P Release ◽

C:P Ratio

SUMMARYThis research sought to link Andean soil knowledge and farmer categorization of soil fertility to soil science characterization of soils, and use these to understand the impacts of phosphorus (P) fertilization of legumes using rock phosphate and soluble P fertilizer in 17 smallholder-managed sites with varying soil properties. We found that farmer high/low categorization of soils corresponded to soil P fertility and distance from farmer dwellings. Measures of soil P fertility also were inversely related to mycorrhizal colonization of vetch roots and directly related to the potential for P release by legume residues (C:P ratio). However, particular soil properties (texture and calcium phosphate pools) were better in explaining the response of legume biological nitrogen fixation to P addition, with maximal impacts in low-clay soils and soils with low calcium phosphates, as assessed with a dilute HCl extraction. In these conducive contexts, legume BNF increased 67 and 150% for RP and TSP, respectively (p < 0.05), with similar increases in biomass P stocks that showed promise for soil regeneration. In low-P fields, added P increased potential P release from legume residues via lower C:P ratios (p < 0.05). Percent cover of soil increased from 35% in the control to 45 and 55% with RP and TSP (p < 0.05), which shows potential for reduced erosion risk under P fertilization of legumes. We discuss results with respect to the integration of local farmer knowledge systems with exogenous scientific knowledge.

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Role of Epichloë Endophytes in Improving Host Grass Resistance Ability and Soil Properties

Journal of Agricultural and Food Chemistry ◽

10.1021/acs.jafc.0c01396 ◽

2020 ◽

Vol 68 (26) ◽

pp. 6944-6955 ◽

Cited By ~ 1

Author(s):

Jianfeng Wang ◽

Wenpeng Hou ◽

Michael J. Christensen ◽

Xiuzhang Li ◽

Chao Xia ◽

...

Keyword(s):

Soil Properties ◽

Epichloë Endophytes

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Alluvial Soil Chronosequence in the Inner Coastal Plain, Central Virginia

Quaternary Research ◽

10.1006/qres.1993.1023 ◽

1993 ◽

Vol 39 (2) ◽

pp. 201-213 ◽

Cited By ~ 29

Author(s):

Jeffrey L. Howard ◽

Dan F. Amos ◽

W. Lee Daniels

Keyword(s):

Chemical Composition ◽

Soil Properties ◽

Clay Mineral ◽

Coastal Plain ◽

Chemical Weathering ◽

Bulk Composition ◽

Alluvial Soil ◽

Bulk Chemical Composition ◽

Late Middle Miocene ◽

Bulk Chemical

AbstractA chronological sequence of soils formed on a series of alluvial depositional surfaces ranging in age from late-middle Miocene to late Pleistocene was characterized to clarify soil-geomorphic relations and provide a basis for allostratigraphic subdivision of the inner Coastal Plain. On Quaternary river terraces, Ultic Hapludalfs containing abundant weatherable mineral species and clast types are estimated to have formed in 60,000-120,000 yr, whereas Typic Hapludults greatly depleted in weatherable minerals and showing strong weathering of clast types are estimated to be 700,000-1,600,000 yr old. Typic Paleudults with incipient plinthite, duripan, and ferricrete development characterize interfluves that have been little eroded since early Pliocene time (3.4-5.3 myr ago). Typic-Plinthic Paleudults with intense weathering of siliceous clasts and moderate to strong duripan and ferricrete development are found on surfaces that formed near the beginning of late Miocene time (10.8-13.0 myr ago). Chemical weathering in the chronosequence may be classified into three progressive stages: (1) decomposition of unstable sand- and silt-sized minerals into a mixed (stable + unstable) clay-mineral suite (stable Fe + Al/Si bulk chemical composition, < 106 yr); (2) transformation of mixed clay-mineral suite into a stable suite (increasing Fe + Al/Si bulk chemical composition, 106 - 107 yr); and (3) transformation of stable suite into ultrastable clay-mineral suite (increasing Fe/Si bulk composition, > 107 yr). Not all soil properties show unidirectional development, nor is a steady state of pedon development observed even after approximately 107 yr of chemical weathering. Soil development in the chronosequence is episodic. The transition from one phase to the next is marked by a change in rate, and sometimes a reversal in the direction, of development of one or more soil properties.

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