Pore-size distribution in loamy soils: A comparison between microtomographic and capillarimetric determination methods

Шеин, Е. В.; Скворцова, Е. Б.; Dembovetskii, A. V.; Абросимов, К. Н.; Il’in, L. I.; Shnyrev, N. A.

doi:10.1134/s1064229316030091

Cited by 21 publications

(8 citation statements)

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“…In organic (agro-ecology) system the main problem is the transition period, wherein the problems of soil compaction, dead-end porosity (Shein et al, 2016), low soil nitrogen production, low rate of crop remnants and manure conversion, soil productivity stagnation on the low level are critical. Over and again new approaches are needed to overcome the shortcomings of industrial agriculture and thus attain the higher level organic agriculture.…”

Section: Discussionmentioning

confidence: 99%

Soil Fertility in Agriculture: Russia – Western Europe – USA: in the Past and Today

2017

Biogeosystem Technique

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An overview is presented of how scientific agriculture perceived soils as stocks for minerals for crop production, and to what extend this perception, as it is accepted in agronomy, is considered as relevant in related scientific fields. In the nineteenth century the role of microbiology in soil ecosystems was revealed, the balance of crop remnants and manure conversion was studied, as well as seasonal crop feeding at different systems of manuring, crop rotation, tillage and mixed systems, to manage the balance of crop-and livestock production under low external input conditions. Particularly after World War II, the long-term experience of 'living soils' was ruined by the practice of excessive external inputs of agrochemicals-fertilisers and subsequently pesticides. On a minimized scale, soil-friendly agriculture was and still is present in organic and biodynamic movements, together with various other agro-ecological approaches, attempting to overcome the disadvantages of industrial agronomical agriculture. On this way the FAO declared the year 2015 as the year of soil, while very the same FAO had supported the chemical agriculture for decades in the recent past. This metamorphose has appeared because the shocking soil-destructive role of industrial agronomy causing soil degradation (soil erosion, poisoning and compaction) with flooding followed by drought-the total anthropogenous uncertainty of agricultural land and biosphere as a whole is now becoming more and more obvious. Today soil-ecosystem awareness arises in plant breeding, biosphere & climate, human health, rural development, manuring and phytopathology's pesticide effects on soil ecosystems. In organic (agro-ecology) systems the main problem is the transition period, wherein the mentioned problems of soil compaction, dead-end porosity, low soil nitrogen production, low rate of crop remnants and manure conversion, soil productivity stagnation on the low level are critical. Over and again new approaches are needed to overcome the shortcomings of industrial agriculture and thus attain the higher level organic agriculture. It will be shown that organic/agro-ecological farming systems produce much better that usually known. Moreover, Biogeosystem Technique is a promising transcendental integral approach to overcome the conflict of technology and biosphere.

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Section: Discussionmentioning

confidence: 99%

Soil Fertility in Agriculture: Russia – Western Europe – USA: in the Past and Today

2017

Biogeosystem Technique

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“…The soil pore system influences many basic soil functions and properties (Shein et al, 2016). The soil pore system has a major impact on soil physical properties and soil health, and influences water movement and solute transport (Guo et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…The size distribution of soil pores is influenced by factors such as root activity, wetting-drying cycles, biotic and anthropogenic activities, the latter being mainly related to tillage systems (Bronick & Lal, 2005;Pagenkemper et al, 2013;Pires et al, 2008). The soil pore system influences many basic soil functions and properties (Shein et al, 2016). The soil pore system has a major impact on soil physical properties and soil health, and influences water movement and solute transport (Guo et al, 2020).…”

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“…The quantitative determination of soil pore space is usually based on the analysis of soil water retention curves. This method establishes a relationship between the volume of water discharged at a given pressure head and pore size, but does not estimate the shape and orientation of soil pores (Shein et al, 2016). Morphometric analysis of pores in thin sections using light and electron microscopes is another applied method to study the shape and orientation of soil pores (Shein et al, 2016).…”

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Effects of tillage systems on soil organic carbon and some soil physical properties

2022

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Conservation tillage by increasing soil organic carbon can improve soil structure, especially in arid and semiarid regions. In this study, the effects of three tillage systems [conventional (CT), reduced (RT), and no‐till (NT)] in a wheat‐maize crop rotation on soil organic carbon content (SOC) and some physical properties of a clay loam soil were investigated. The field experiment was set up in a randomized complete block design with three replications in the third year in northeastern Iran. Samples of disturbed and undisturbed soil were collected from 0–15 and 15–30 cm depths and analyzed to quantify SOC content, pore size distribution, hydraulic properties, and aggregate stability. SOC was higher in NT than in the RT and CT treatments, due to the use of cover crops (clover) and the retention of crop residues in this system. The highest water‐stable and macro‐aggregate content were also obtained in the NT system. The highest water contents (for most of the matric suctions) were found in the treatments CT and RT, which also had a high total soil porosity. It was found that tillage in CT and RT loosened the soil and thus increased the total porosity. The highest air‐entry value was found in the CT treatment at 15–30 cm depth, which contained the most micro‐aggregates. However, the maximum n‐value (shape parameter of the water retention curve) was obtained in the treatment with the largest pores, that is, NT at a depth of 15–30 cm. X‐ray images of the pore space and pore function data (dmean, dmode, and dmedian) showed that the largest soil pores were found in the NT treatment, probably due to the high SOC in the NT system. The results of this study showed that the effects of tillage systems on soil physical properties are strongly dependent on SOC. Based on the results of this study, the use of a no‐till system with crop rotation that includes cover crops and crop residue retention is recommended to increase soil organic matter and thereby improve soil structural stability in arid and semiarid regions.

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“…Ivanov et al [37] discussed the applications of X-ray computed tomography (X-ray CT) in soil science and found that X-ray CT could effectively help to visualize the three-dimensional pore structures to acquire the parameters (pore diameter, volume, shape, orientation, connectivity, tortuosity, coordinate (contact) numbers, porosity, pore size distribution etc.) and even to calculate and simulate the permeability [41] or the water retention curve [42] of the soil with pores and fissures, thereby having significant hydraulic importance to reveal the laws of soil water movement. Zhang et al [43] and Zhang et al [44] investigated the susceptibility of macropore flow in different cultivating years and found that an old oasis (cultivated for more than 50 years) is prone to facilitate macro flow.…”

Section: Introductionmentioning

confidence: 99%

Influencing Factors of the Spatial–Temporal Variation of Layered Soils and Sediments Moistures and Infiltration Characteristics under Irrigation in a Desert Oasis by Deterministic Spatial Interpolation Methods

Zhang

et al. 2019

Water

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Soil moisture is the main limiting factor for crop growth and the sustainable development of oases in arid desert areas. Therefore, the temporal and spatial variation and infiltration laws of oasis soil moisture should be studied. The objective of this study is to reveal the influencing factors of the spatial-temporal variation of layered soil and sediment moisture and infiltration characteristics under irrigation in desert oases. Hydraulic conductivities were measured using the double-ring infiltrometer, while the regional and site soil moistures were measured and calibrated using weighted method and neutron moisture meter. Deterministic spatial interpolation methods, including multiquadric radial basis function, inverse distance weighted, and local polynomial regression isogram, were adopted to map the regional distribution of hydraulic conductivities, spatial soil moistures, and spatial-temporal isogram of the point site soil moistures in Yaoba Oasis, respectively. Results showed that the leading influencing factors of the (1) regional spatial soil moisture were soil and sediment permeability, stream link direction, microclimate, and dewfalls; (2) spatial layered soil and sediment moistures were microclimate and dew condensation; and (3) spatial-temporal variation at the point site profiles were soil texture, water requirement, and preferential flow. Under irrigation, soil moisture increased significantly, in which the maximum increase was 10.8 times the original state, while the recharging depth substantially increased up to 580 cm with the preferential flow. The spatial-temporal variation of the soil moisture under irrigation indicated that the best irrigation frequency should be 15 days per time. Moreover, the infiltration process can be divided into the preferential flow, piston flow, and balanced infiltration stages.

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Pore-size distribution in loamy soils: A comparison between microtomographic and capillarimetric determination methods

Cited by 21 publications

References 10 publications

Soil Fertility in Agriculture: Russia – Western Europe – USA: in the Past and Today

Soil Fertility in Agriculture: Russia – Western Europe – USA: in the Past and Today

Effects of tillage systems on soil organic carbon and some soil physical properties

Influencing Factors of the Spatial–Temporal Variation of Layered Soils and Sediments Moistures and Infiltration Characteristics under Irrigation in a Desert Oasis by Deterministic Spatial Interpolation Methods

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