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Journal articles on the topic 'Spatial variability of soils'

Author: Grafiati

Published: 20 July 2024

Last updated: 31 July 2025

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1

Rahman, S., L. C. Munn, R. Zhang, and G. F. Vance. "Rocky Mountain forest soils: Evaluating spatial variability using conventional statistics and geostatistics." Canadian Journal of Soil Science 76, no. 4 (1996): 501–7. http://dx.doi.org/10.4141/cjss96-062.

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Spatial variability of soils is a landscape attribute which soil scientists must identify and understand if they are to construct useful soils maps. This paper describes the spatial variability of soils in a forested watershed in the Medicine Bow Mountains, Wyoming, using both conventional statistics and geostatistics. Principle Components Analysis indicated that flow accumulation and aspect were the two terrain attributes that most economically described terrain variability. Thickness of A and B horizons, organic carbon and solum coarse fragments were variable in the study area (CVs of 40 to

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2

K., I. OFEM, F. EDIENE V., KINGSLEY JOHN, and U. AKPAN-IDIOK A. "SPATIAL VARIABILITY OF SOIL PROPERTIES IN YAKURR LOCAL GOVERNMENT AREA, SOUTHEAST NIGERIA." Asian Journal of Plant and Soil Sciences 2, no. 1 (2017): 6–16. https://doi.org/10.5281/zenodo.1407329.

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The status and spatial variability of soil properties across agrarian communities in Yakurr Local Government Area, Southeast Nigeria were assessed and soil management strategies suggested for limiting soil properties. Nine communities were identified within the study area and soil samples collected from young fallow lands measuring 40 m by 40 m at depths of 0 – 20 cm and 20 – 40 cm to represent surface and subsurface soils respectively. The interpolation of the area was done using the deterministic methods of inverse distance weighting (IDW) in ArcGIS 10.2.2 software. The soils wer

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3

SAMRA, J. S., K. N. S. SHARMA, and N. K. TYAGI. "ANALYSIS OF SPATIAL VARIABILITY IN SODIC SOILS." Soil Science 145, no. 3 (1988): 180–87. http://dx.doi.org/10.1097/00010694-198803000-00004.

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SAMRA, J. S., V. P. SINGH, and K. N. S. SHARMA. "ANALYSIS OF SPATIAL VARIABILITY IN SODIC SOILS." Soil Science 145, no. 4 (1988): 250–56. http://dx.doi.org/10.1097/00010694-198804000-00003.

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Prasanna, Shwetha. "Analysis of Hydraulic Properties of Indian Forest Soil." Journal of Civil Engineering and Construction 7, no. 1 (2018): 12. http://dx.doi.org/10.32732/jcec.2018.7.1.12.

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Soils are a product of the factors of formation and continuously change over the earth’s surface. The analysis of the spatial variability of soil properties is important for land management and construction of an ecological environment. Soils are characterized by high degree of spatial variability due to the combined effect of physical, chemical or biological processes that operate with different intensities and at different scales. The spatial variability of soil hydraulic properties helps us to find the subsurface flux of water. The most frequently used hydraulic properties are soil water re

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Phontusang, Porntip, Roengsak Katawatin, Krirk Pannangpetch, Sununtha Kingpaiboon, and Rattana Lerdsuwansri. "Spatial Variability of Sodium Adsorption Ratio and Sodicity in Salt-Affected Soils of Northeast Thailand." Advanced Materials Research 931-932 (May 2014): 709–15. http://dx.doi.org/10.4028/www.scientific.net/amr.931-932.709.

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Information on spatial variability of Sodium Adsorption Ratio (SAR) is useful for implementation of appropriate control measures for the salt-affected soils. The major objective of this study was to use geostatistics to describe the spatial variability of (i) the SAR and consequently (ii) the soil sodicity, in areas of different classes of salt-affected soils. Attention was on areas of very severely salt-affected soils (class 1), severely salt-affected soils (class 2), and moderately salt-affected soils (class 3). For each class, 2 study sites were chosen, totally 6 sites were taken into consi

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Hadi, Teeba Abdel Karim Abdel, Amal Radhi Jubeir, and Mohammed A. Hussain. "Spatial Variability of Some Soil Microorganisms." IOP Conference Series: Earth and Environmental Science 1158, no. 2 (2023): 022023. http://dx.doi.org/10.1088/1755-1315/1158/2/022023.

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Abstract The study area was chosen in the field of the College of Agriculture of Al-Qasim Green University, confined between longitudes 22.6° 22° 044° to 00.9° 24° 0.44° east and between latitudes 19.3° 21° 32° to 21.7° 24° 32° N, and the study area was interlocked and identified The coordinates were obtained by GPS, as samples were obtained from 40 sites of cultivated soils. For two surface depths 0-30 cm and sub-surface 30-60 cm and 40 sites for leftover soils of two depths as well, The volumetric analysis results showed that the variability of the microorganisms in the soil was that the Azo

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Orfánus, T., Z. Bedrna, Ľ. Lichner, D. Hallett P, K. Kňava, and M. Sebíň. "Spatial variability of water repellency in pine forest soil." Soil and Water Research 3, Special Issue No. 1 (2008): S123—S129. http://dx.doi.org/10.17221/11/2008-swr.

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The variability of water repellency of pine-forest arenic regosols and its influence on infiltration processes were measured in southwest Slovakia. The water drop penetration time (WDPT) tests of soil water repellency and infiltration tests with a miniature tension infiltrometer (3 mm diameter) were performed. Large differences in infiltration were observed over centimetre spatial resolution, with WDPT tests suggesting water repellency varying from extreme to moderate levels. For soils with severe to extreme water repellency determined with WDPT, steady state infiltration was not reached in te

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Obalum, S. E., J. Oppong, C. A. Igwe, Y. Watanabe, and M. E. Obi. "Spatial variability of uncultivated soils in derived savanna." International Agrophysics 27, no. 1 (2013): 57–67. http://dx.doi.org/10.2478/v10247-012-0068-9.

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Abstract The spatial variability of some physicochemical properties of topsoils/subsoils under secondary forest, grassland fallow, and bare-soil fallow of three locations was evaluated. The data were analyzed and described using classical statistical parameters. Based on the coefficient of variation, bulk density, total porosity, 60-cm-tension moisture content, and soil pH were of low variability. Coarse and fine sand were of moderate variability. Highly variable soil properties included silt, clay, macroporosity, saturated hydraulic conductivity, organic matter concentration, and cation excha

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10

Miller, R. D. "Intrinsic Mesoscopic Spatial Variability in Macroscopically Uniform Soils." Soil Science Society of America Journal 58, no. 5 (1994): 1364–67. http://dx.doi.org/10.2136/sssaj1994.03615995005800050012x.

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11

Ryan, J. "Spatial variability of soluble boron in Syrian soils." Soil and Tillage Research 45, no. 3-4 (1998): 407–17. http://dx.doi.org/10.1016/s0933-3630(97)00037-8.

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Guérin, Julie, Léon-Étienne Parent, and Bing Si. "Spatial and seasonal variability of phosphorus risk indexes in cultivated organic soils." Canadian Journal of Soil Science 91, no. 2 (2011): 291–302. http://dx.doi.org/10.4141/cjss10089.

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Guérin, J. É., Parent, L.-É. and Si, B. C. 2011. Spatial and seasonal variability of phosphorus risk indexes in cultivated organic soils. Can. J. Soil Sci. 91: 291–302. Many reports have attributed phosphorus (P) leaching from cultivated organic soils and the eutrophication of adjacent surface waters to P fertilization exceeding the P sorption capacity of the soil. The index of phosphorus saturation (IPS) using the Mehlich III method (M-III) has been proposed to define an agri-environmental threshold of P saturation in cultivated organic soils. The spatial and temporal variability of IPSM-III

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MacDonald, J. D., and W. H. Hendershot. "Spatial variability of trace metals in Podzols of northern forest ecosystems: Sampling implications." Canadian Journal of Soil Science 83, no. 5 (2003): 581–87. http://dx.doi.org/10.4141/s03-007.

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The concentrations of metals in soils are spatially heterogeneous and soil sampling carried out when studying metals in forest ecosystems is often inadequate. We examined the spatial variability of Cd, Cu, Mn, Ni, Pb and Zn in northern forest ecosystems on a transect with distance from two point source emitters with the goal of providing basic information about the distribution and variability of metals in these soils. Samples were taken under six sampling points at four depths from three experimental sites on each of the two transects. Soils were analysed for acid digestible metals, pH and or

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Hani, Abbas, Narges Sinaei, and Ali Gholami. "Spatial Variability of Heavy Metals in the Soils of Ahwaz Using Geostatistical Methods." International Journal of Environmental Science and Development 5, no. 3 (2014): 294–98. http://dx.doi.org/10.7763/ijesd.2014.v5.495.

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Rodrigo Alberto, Saquicela Rojas, Lelly Useche Castro, and Ana Francisca Gonzalez Pedraza. "Sampling the spatial variability of grassland soil properties." Minerva 2023, Special (2023): 74–86. http://dx.doi.org/10.47460/minerva.v2023ispecial.119.

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The properties of grazed grassland soils are frequently degraded in tropical zones. This work aimed to review the literature on the theory and results of sampling and analysis of the spatial variability of pasture soil properties in the world and Ecuador. The methodology, results, and discussion of 15 articles on the subject, available in the following databases: Scopus, SciELO, ScienceDirect, Scimago Journal & Country Rank, Dialnet, and SpringerLink; and the respective theory of 5 books were reviewed. It was found that worldwide there are soil sampling works that evaluate the spatial vari

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Sidorovaand, Valeria, and Maria Yurkevich. "Spatial variability of soil properties and its effect on meadow productivity." BIO Web of Conferences 66 (2023): 04003. http://dx.doi.org/10.1051/bioconf/20236604003.

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The spatial heterogeneity of the yield of perennial grasses was studied to identify soil factors that most affect the productivity of sown meadows in South Karelia. Soil variability was studied using various statistical and geostatistical methods. In the course of research, it was found that the best conditions for the growth of perennial grasses are created on soils with a carbon content of about 8% and a slightly acidic or close to neutral reaction environment. It is noted that the type of soil affects the organic carbon content and change in the yield of perennial grasses. In the diagnostic

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17

Høgh Jensen, K., and M. B. Butts. "Modelling of Unsaturated Flow in Heterogeneous Soils." Hydrology Research 17, no. 4-5 (1986): 281–94. http://dx.doi.org/10.2166/nh.1986.0020.

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Modelling of soil moisture conditions in spatially variable fields is treated using stochastic methods. Spatial variability of moisture content in a vegetation covered field is partly caused by field variability in soil physical parameters. In the present study a physically based model is coupled with a statistical description of retention properties and saturated hydraulic conductivity respectively to simulate moisture conditions in heterogeneous soils. Results are compared with measurements obtained from two 0.5 ha field sites. Simulations based on the variation in retention properties are s

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CHIZHIKOV, V. N., and R. S. SHARIFULLIN. "SPATIAL VARIABILITY OF AGROCHEMICAL INDICATORS OF RICE FIELDS SOILS." Rice Growing 63, no. 2 (2024): 59–63. http://dx.doi.org/10.33775/1684-2464-2024-63-2-59-63.

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Brooker, P. I. "Irrigation equipment selection to match spatial variability of soils." Mathematical and Computer Modelling 33, no. 6-7 (2001): 619–23. http://dx.doi.org/10.1016/s0895-7177(00)00266-1.

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Bloem, Elke, Silvia Haneklaus, Gerd Sparovek, and Ewald Schnug. "SPATIAL AND TEMPORAL VARIABILITY OF SULPHATE CONCENTRATION IN SOILS." Communications in Soil Science and Plant Analysis 32, no. 9-10 (2001): 1391–403. http://dx.doi.org/10.1081/css-100104201.

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21

Hernández, A., L. Lugo, A. Mora Garcés, J. Sánchez, and E. Arends. "Spatial variability of soils under a slash-burn cultivation system in Amazonas-Venezuela." Forest Systems 12, no. 2 (2003): 43–54. http://dx.doi.org/10.5424/800.

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This paper analyzes, by geostatistical methods, the spatial variability in soil properties between two contrasting soils: under a recently slashed and burned cultivation system and another one 12- year old secondary forest after slash-burn. The soils are located in a Piaroa Community, Sipapo Forestry Reserve, State of Amazonas-Venezuela. In each field was settled a plot of 20 × 20 m and soil samples were taken approximately 5 m apart from each other with a depth from 0 to 20 cm. The data were located spatially in X-Y coordinates for semivariography and mapping by Kriging. The soil of the area

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Jamali, Kanwal, Farman Sahito, Zia-ul-Hassan Shah, et al. "Spatial Variability Mapping of Selected Soil Properties of District Tando Allahyar, Sindh, Pakistan." Journal of Applied Research in Plant Sciences 4, no. 02 (2023): 625–36. http://dx.doi.org/10.38211/joarps.2023.04.02.188.

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Spatial variability mapping of soil properties is essential to understand the differences among soils found in a geographical region for their better management. This study aimed at spatial variability mapping of selected soil properties of district Tando Allahyar, Sindh which is one of the most important districts of Sindh province. The results revealed that majority of soils (35.6%) had loamy slightly medium-textured type, including 30.8% silt loam, 3.8% loam and 1.0% silt, followed by clayey, fine-textured heavy type (27.9%), including 18.3% clay, 6.7% silty clay and 2.9% sandy clay. Soils

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23

Sharda, Vaishali, Cameron Handyside, Bernardo Chaves, Richard T. McNider, and Gerrit Hoogenboom. "The Impact of Spatial Soil Variability on Simulation of Regional Maize Yield." Transactions of the ASABE 60, no. 6 (2017): 2137–48. http://dx.doi.org/10.13031/trans.12374.

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Abstract. The study of climate variability and its impacts on crop production has become a continuous effort for the scientific community over the past two decades. However, the impact of spatial soil variability along with climatic factors on crop yield remains uncertain. The objective of this study was to determine the impact of soil and climatic variability on maize yield. We used Alabama as a case study because the agriculture is predominantly rainfed and there is a large variability in growing season precipitation due to the influence of climate variability signals such as the El Niño Sou

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Banerjee, Samiran, and Steven D. Siciliano. "Factors Driving Potential Ammonia Oxidation in Canadian Arctic Ecosystems: Does Spatial Scale Matter?" Applied and Environmental Microbiology 78, no. 2 (2011): 346–53. http://dx.doi.org/10.1128/aem.06132-11.

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ABSTRACTAmmonia oxidation is a major process in nitrogen cycling, and it plays a key role in nitrogen limited soil ecosystems such as those in the arctic. Although mm-scale spatial dependency of ammonia oxidizers has been investigated, little is known about the field-scale spatial dependency of aerobic ammonia oxidation processes and ammonia-oxidizing archaeal and bacterial communities, particularly in arctic soils. The purpose of this study was to explore the drivers of ammonia oxidation at the field scale in cryosols (soils with permafrost within 1 m of the surface). We measured aerobic ammo

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Wang, Rui, J. Alex Thomasson, Michael S. Cox, Ruixiu Sui, and Elizabeth G. Marley Hollingsworth. "Cotton Fiber-Quality Prediction Based on Spatial Variability in Soils." Journal of Cotton Science 21, no. 3 (2017): 220–28. http://dx.doi.org/10.56454/jzol2651.

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Maximizing cotton fiber quality is crucial for the continued success of the U.S. cotton industry. Previous studies have indicated that spatial variability of fiber-quality properties exists and is a factor in revenue variability across a field. Site-specific fiber-quality prediction potentially could be managed on the farm to optimize fiber quality with respect to profitability, or the harvest could be segregated according to fiber quality to increase a producer’s overall crop price. Fiber micronaire was identified as the target property for study because of its moderate variation at the farm-

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Mainuri, Zachary Gichuru, and James Odhiambo Owino. "Spatial Variability of Soil Aggregate Stability in a Disturbed River Watershed." European Journal of Economics and Business Studies 9, no. 1 (2017): 278. http://dx.doi.org/10.26417/ejes.v9i1.p278-290.

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Analysis of spatial distribution of soil properties like soil aggregate stability presents an important outset for precision agriculture. The study area was classified into different landscape units according to physiographic features namely: mountains, plateaus, uplands, valleys, pen plains, alluvial plains, lacustrine plains and hills and maps were drawn. The objectives of this study were to evaluate the effects of landscape and land use interaction on the spatial variability of aggregate stability. The variability of aggregate stability exhibited spatial dependence (SDP) which helped in the

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Akbas, F., H. Gunal, and N. Acir. "Spatial variability of soil potassium and its relationship to land use and parent material." Soil and Water Research 12, No. 4 (2017): 202–11. http://dx.doi.org/10.17221/32/2016-swr.

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Information on the spatial distribution of plant nutrients is a prerequisite to predict their behaviour and to monitor the fertility in a watershed. This study was conducted to evaluate variations of plant available potassium (PAK) and non-exchangeable potassium (NEK) of a watershed with different land use and parent materials. Eight hundred soil samples were taken from 0–30 and 30–60 cm depths across the Kazova watershed of 20 656 ha in size. Average PAK was 152.8 mg/K kg in surface layers and 167.2 mg/kg in subsurface layers. NEK was 925 mg K/kg in surface and 167.2 mg K/kg in subsurface lay

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Qu, Mingkai, Weidong Li, and Chuanrong Zhang. "County-Scale Spatial Variability of Macronutrient Availability Ratios in Paddy Soils." Applied and Environmental Soil Science 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/689482.

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Macronutrients (N, P, and K) are essential to plants but also can be harmful to the environment when their available concentrations in soil are excessive. Availability ratios (available concentration/total concentration) of macronutrients may reflect their transforming potential between fixed and available forms in soil. Understanding their spatial distributions and impact factors can be, therefore, helpful to applying specific measures to modify the availability of macronutrients for agricultural and environmental management purposes. In this study, 636 topsoil samples (0–15 cm) were collecte

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Gravuer, Kelly, Anu Eskelinen, Joy B. Winbourne, and Susan P. Harrison. "Vulnerability and resistance in the spatial heterogeneity of soil microbial communities under resource additions." Proceedings of the National Academy of Sciences 117, no. 13 (2020): 7263–70. http://dx.doi.org/10.1073/pnas.1908117117.

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Spatial heterogeneity in composition and function enables ecosystems to supply diverse services. For soil microbes and the ecosystem functions they catalyze, whether such heterogeneity can be maintained in the face of altered resource inputs is uncertain. In a 50-ha northern California grassland with a mosaic of plant communities generated by different soil types, we tested how spatial variability in microbial composition and function changed in response to nutrient and water addition. Fungal composition lost some of its spatial variability in response to nutrient addition, driven by decreases

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Johnson, Mark S., Johannes Lehmann, Tammo S. Steenhuis, Luciélio Vargem de Oliveira, and Erick C. M. Fernandes. "Spatial and temporal variability of soil water repellency of Amazonian pastures." Soil Research 43, no. 3 (2005): 319. http://dx.doi.org/10.1071/sr04097.

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Fire is commonly used to establish and maintain pastures in the Amazon. Fire is also known to induce soil water repellency but few published data exist for the humid tropics. The objectives of this study were to characterise the intensity and spatial variability of water repellency on previously burned pasture soils in the Amazon, and its effect on the nutrient status of the forage grass Brachiaria brizantha (Hochst.) Stapf. Surface soils of pastures and forests in north-western Mato Grosso, Brazil, were found to exhibit soil water repellency using MED and WDPT tests. Soil water repellency was

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CARVALHO, LAÉRCIO A. DE, ISMAEL MEURER, CARLOS A. DA SILVA JUNIOR, CRISTIANE F. B. SANTOS, and PAULO L. LIBARDI. "Spatial variability of soil potassium in sugarcane areas subjected to the application of vinasse." Anais da Academia Brasileira de Ciências 86, no. 4 (2014): 1999–2012. http://dx.doi.org/10.1590/0001-3765201420130319.

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When deposited on land the vinasse can promote improvement in fertility, however, often fertilizer application occurs in areas considered homogeneous, without taking into account the variability of the soil. The objective of this study was to evaluate the effect of vinasse application on potassium content in two classes of soils cultivated with sugarcane, and characterize the spatial variability of soil using geostatistical techniques. In the 2010 and 2011 crop year, soil samples were collected from an experimental grid at 0-0.2 and 0.2-0.4 m depth in three soils cultivated with sugarcane, tot

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Wardamı, Al-mabrouk Hamid Hasan, Sabit Erşahin, and Gülay Karahan. "Variable rate phosphorus fertilizer recommendations for rainfed wheat." Mediterranean Agricultural Sciences 37, no. 1 (2024): 41–50. http://dx.doi.org/10.29136/mediterranean.1199628.

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A uniform application of phosphorus (P) fertilizers to spatially variable soils often results in under-fertilization in low P-localities and over-fertilization in high P-localities. This study aimed to evaluate the variable rate applicability of P fertilizers on a 300-ha sloping landscape under rainfed winter wheat cultivation for over 70 years. The soils were sampled (155 samples) using a random spatial sampling technique based on visual differences in soil color and topographic factors. Plant available soil P content (Pav) and other variables of soil samples were analyzed. The spatial variab

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Shi, Guicai, Yutao Pan, Zhaohua Sun, Yong Liu, and Fook-Hou Lee. "Characteristic strength of soils underlying foundations considering effect of spatial variability." Canadian Geotechnical Journal 57, no. 4 (2020): 518–36. http://dx.doi.org/10.1139/cgj-2019-0043.

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In Eurocode EC7, a “characteristic” strength is used as a cautious estimate of the local average strength that governs the bearing capacity of the foundation. The objective of this paper is to examine the correlation between the local average strength and the bearing capacity of a stiff caisson foundation resting on spatially variable ground using random finite element analyses. The results show that using the local average strength over some assumed or postulated failure zones tends to overestimate the mean bearing capacity of the ground. This can be attributed to two possible reasons. Firstl

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Goncharova, O. Yu, O. V. Semenyuk, G. V. Matyshak, and L. G. Bogatyrev. "Biological Activity of Urban Soils: Spatial Variability and Control Factors." Eurasian Soil Science 55, no. 8 (2022): 1082–94. http://dx.doi.org/10.1134/s1064229322080038.

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Iqbal, Javed, John A. Thomasson, Johnie N. Jenkins, Phillip R. Owens, and Frank D. Whisler. "Spatial Variability Analysis of Soil Physical Properties of Alluvial Soils." Soil Science Society of America Journal 69, no. 4 (2005): 1338–50. http://dx.doi.org/10.2136/sssaj2004.0154.

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Al-Omran, A. M., M. I. Al-Wabel, S. E. El-Maghraby, M. E. Nadeem, and S. Al-Sharani. "Spatial variability for some properties of the wastewater irrigated soils." Journal of the Saudi Society of Agricultural Sciences 12, no. 2 (2013): 167–75. http://dx.doi.org/10.1016/j.jssas.2012.12.001.

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Jetten, V. G., H. Th. Riezebos, F. Hoefsloot, and J. Van Rossum. "Spatial variability of infiltration and related properties of tropical soils." Earth Surface Processes and Landforms 18, no. 6 (1993): 477–88. http://dx.doi.org/10.1002/esp.3290180602.

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Charnay, Marie-Paule, Sébastien Tuis, Yves Coquet, and Enrique Barriuso. "Spatial variability in14C-herbicide degradation in surface and subsurface soils." Pest Management Science 61, no. 9 (2005): 845–55. http://dx.doi.org/10.1002/ps.1092.

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BASUMATARY, A. "Spatial variability of fertility status in soils of Dima Hasao district of Assam." Annals of Plant and Soil Research 23, no. 3 (2021): 368–74. http://dx.doi.org/10.47815/apsr.2021.10086.

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Two hundred fifty geo-referenced surfaces (0-15 cm) soil samples were collected and analysed for macronutrients and micronutrients to study fertility status in soils of Dima Hasao district of Assam and their relationship with some important soil properties. Soils of the district were found to be extremely acidic to slightly acidic in reaction with a low to high organic carbon content and low in cation exchange capacity. The soil of the district indicated that the available nitrogen, phosphorus and potassium status was observed to the tune of 14.0 %,7.2% and 67.2% under low and 86.0 %, 92.8 % a

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Marcela, Rohošková, and Borůvka Vít Penížek and Luboš. "Study of Anthropogenic Soils on a Reclaimed Dumpsite and their Variability by Geostatistical Methods." Soil and Water Research 1, No. 2 (2013): 72–78. http://dx.doi.org/10.17221/6508-swr.

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Soils of reclaimed dumpsites after coal mining are considered as typical anthropogenic soils. These soils are at the beginning of their development and have certain specific characteristics. The aim of this study was to describe a soil survey performed on anthropogenic soils of a reclaimed dumpsite, to analyse spatial variability of selected properties using geostatistical methods, and to evaluate the development of reclaimed dumpsite soils. It has been shown that geostatistical methods are suitable for a description of anthropogenic soil properties and their variability. However, characteriza

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CARTER, M. R., and J. R. PEAREN. "GENERAL AND SPATIAL VARIABILITY OF SOLONETZIC SOILS IN NORTH CENTRAL ALBERTA." Canadian Journal of Soil Science 65, no. 1 (1985): 157–67. http://dx.doi.org/10.4141/cjss85-016.

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The general and spatial variation of several soil profile chracteristics, and properties of agronomic and ameliorative importance, were determined on a regional and local area of Solonetzic soil in north central Alberta. Differences in general variation as characterized by the mean, median, coefficient of variation (CV), and range allowed grouping of soil properties according to high (e.g. EC in the Ap horizon), medium and low (e.g. pH of the Ap horizon) variation. Such grouping, along with specific differences in soil variation between the regional and local area was associated with the salin

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Sen, Rintu, Zachary T. Zambreski, and Vaishali Sharda. "Impact of Spatial Soil Variability on Rainfed Maize Yield in Kansas under a Changing Climate." Agronomy 13, no. 3 (2023): 906. http://dx.doi.org/10.3390/agronomy13030906.

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As the climate changes, a growing demand exists to identify and manage spatial variation in crop yield to ensure global food security. This study assesses spatial soil variability and its impact on maize yield under a future climate in eastern Kansas’ top ten maize-producing counties. A cropping system model, CERES-Maize of Decision Support System for Agrotechnology Transfer (DSSAT) was calibrated using observed maize yield. To account for the spatial variability of soils, the gSSURGO soil database was used. The model was run for a baseline and future climate change scenarios under two Represe

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Grabs, T., K. H. Bishop, H. Laudon, S. W. Lyon, and J. Seibert. "Riparian zone processes and soil water total organic carbon (TOC): implications for spatial variability, upscaling and carbon exports." Biogeosciences Discussions 9, no. 3 (2012): 3031–69. http://dx.doi.org/10.5194/bgd-9-3031-2012.

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Abstract. Groundwater flowing from hillslopes through riparian (near stream) soils often undergoes chemical transformations that can substantially influence stream water chemistry. We used landscape analysis to predict total organic carbon (TOC) concentrations profiles and groundwater levels measured in the riparian zone (RZ) of a 67 km2 catchment in Sweden. TOC exported from 13 riparian soil profiles was then estimated based on the riparian flow-concentration integration model (RIM). Much of the observed spatial variability of riparian TOC concentrations in this system could be predicted from

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Grabs, T., K. Bishop, H. Laudon, S. W. Lyon, and J. Seibert. "Riparian zone hydrology and soil water total organic carbon (TOC): implications for spatial variability and upscaling of lateral riparian TOC exports." Biogeosciences 9, no. 10 (2012): 3901–16. http://dx.doi.org/10.5194/bg-9-3901-2012.

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Abstract. Groundwater flowing from hillslopes through riparian (near-stream) soils often undergoes chemical transformations that can substantially influence stream water chemistry. We used landscape analysis to predict total organic carbon (TOC) concentration profiles and groundwater levels measured in the riparian zone (RZ) of a 67 km2 catchment in Sweden. TOC exported laterally from 13 riparian soil profiles was then estimated based on the riparian flow–concentration integration model (RIM). Much of the observed spatial variability of riparian TOC concentrations in this system could be predi

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KRUGER, G. A., R. E. KARAMANOS, and J. P. SINGH. "THE COPPER FERTILITY OF SASKATCHEWAN SOILS." Canadian Journal of Soil Science 65, no. 1 (1985): 89–99. http://dx.doi.org/10.4141/cjss85-010.

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A survey of the DTPA-extractable Cu levels of approximately 1000 fields representing a large number of soil types in Saskatchewan suggested that, under current cropping systems, Cu deficiencies appear to be concentrated in the Grey Soil Zone. They are especially probable in seven soil associations, which include light Transition of Grey and Brownish-Grey Podzolic soils. Soil criteria for detecting Cu deficiencies in cereal crops cannot be fully documented using conventional calibration tests and techniques. However, data from 21 field trials and a growth chamber study indicated that the critic

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Smirnova, Elena, Kamil Giniyatullin, Ilnas Sahabiev, and Liudmila Ryzhikh. "Evaluation of variability of agrochemical properties on agricultural lands in precision farming perspective technologies." BIO Web of Conferences 17 (2020): 00159. http://dx.doi.org/10.1051/bioconf/20201700159.

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Using the example of two crop rotation fields located in the chernozem zone of the Republic of Tatarstan, the spatial variability of soils agrochemical properties was assessed in terms of the application of precision farming technologies when applying mineral fertilizers. It is shown that the use of mixed samples of polygons with an area of 5 ha as an elementary sampling site is sufficient detail for a geostatistical description of the spatial heterogeneity of the agrochemical properties of chernozem soils.

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Advincula, M. R. B., and J. T. Padrones. "SPATIAL VARIABILITY OF SOIL PHYSICAL PROPERTIES IN SOUTHERN MANKAYAN, BENGUET, PHILIPPINES." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-4/W8-2023 (April 24, 2024): 1–7. http://dx.doi.org/10.5194/isprs-archives-xlviii-4-w8-2023-1-2024.

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Abstract. Hydrothermal alteration in the Mankayan Mineral District in Benguet, Philippines, has had a significant impact on the soil characteristics. Thus, soil characterisation in landslide zones offer useful insights on the nature of slope failure and provide baseline data that may be used with susceptibility mapping and hazard zonations. The study elucidated the physical characteristics of the soils in the southern portion of Mankayan and mapped out the spatial distribution in the area. High sand and low clay content cause low slope stability due to the low water retention in soil, low plas

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Jeong, Sugeun, Yonghee Lee, Haksung Kim, Jeongseon Park, and Daehyeon Kim. "Assessment of Spatial Variability in Ground Models Using Mini-Cone Penetration Testing." Applied Sciences 14, no. 13 (2024): 5670. http://dx.doi.org/10.3390/app14135670.

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The assessment of spatial variability in the ground through field experiments has many constraints due to non-homogenous ground conditions and lack of site investigations. For this reason, spatial variability has not been considered in typical analyses. Also, few studies have been conducted on ground spatial variability using models in the laboratory. However, it is necessary to evaluate spatial variability in the ground for more precise analysis and design of construction projects. In this study, in order to evaluate spatial variability in the ground, we performed a number of Mini-Cone Penetr

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BHARTEEY, PREM KUMAR. "Geospatial variability of soil physico-chemical properties of Moridhal watershed in Dhemaji district of Assam, India using Remote sensing and GIS." Annals of Plant and Soil Research 25, no. 1 (2023): 99–109. http://dx.doi.org/10.47815/apsr.2023.10242.

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Remote sensing and GIS have opened new vistas towards understanding spatial variability of properties of the soil and ensuring resource use in a sustainable manner. The current study was conducted to assess the variability of physical and chemical properties of the flood-prone soils of the Moridhal watershed under Dhemaji district of Assam. The watershed was delineated using toposheets (1:50,000) and geocoded FCC (False Colour Composite) of Resourcesat-2, LISS-4. Four physiographic units of the Moridhal watershed were delineated which included upper piedmont plain, lower piedmont plain, alluvi

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Ding, Ya-Nan, Zu-Fang Qi, Miao Hu, Jin-Zhu Mao, and Xiao-Cheng Huang. "Probabilistic Risk Assessment of Slope Failure in 3-D Spatially Variable Soils by Finite Element Method." Advances in Civil Engineering 2022 (March 2, 2022): 1–13. http://dx.doi.org/10.1155/2022/6191933.

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Quantitative risk assessment of landslides induced by slope failure is an important precondition for formulating effective disaster prevention, mitigation measures, and establishing a landslide risk warning system. In general, the location of the critical slip surface and the failure mode is unlikely to be predicted due to the spatial variability in soil. It remains a challenging task to effectively identify the critical slip surface and conduct the efficient risk assessment based on a three-dimensional (3-D) slope with spatial variability. Based on Monte Carlo simulation and the random field

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