Spatial Variability of Physical Soil Quality Index of an Agricultural Field

Rabbi, Sheikh M.F.; Roy, Bina; Miah, MG; Amin, Mohammad; Khandakar, Tania

doi:10.1155/2014/379012

Cited by 12 publications

(7 citation statements)

References 20 publications

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“…Thus, the enhancement and preservation of the soil quality in arid and semi-arid regions is critical for sustaining land productivity under different land uses and management [5]. Seasonal variability in the soil functions and conditions are due to factors such as climate pattern, land use, cropping sequences, and farming systems [6]. Arid and semi-arid regions are characterized by low precipitation rates of 100-250 and 250-500 mm year −1 , respectively, and the development and formation of soils in these regions is affected by water shortage, daily temperature variations, deflations by wind, and reduced microbial activities [7].…”

Section: Introductionmentioning

confidence: 99%

Seasonal Changes of Soil Quality Indicators in Selected Arid Cropping Systems

et al. 2018

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Abstract:Improving the soil quality in arid agro-ecosystems requires a greater understanding of how the time-of-sampling and management affect the soil measurements. We evaluated the selected soil quality indicators on samples collected at a 0-0.15 m depth, and at various sampling dates of the year, corresponding to the fall of 2015, winter of 2015/2016, spring of 2016, and the summer of 2016. The three crop management systems sampled included alfalfa (Medicago sativa), upland cotton (Gossypium hirsutum), and pecan (Carya illinoinensis). The soil properties measured included the wet aggregate stability (WAS), mean weight diameter of dry aggregates (MWD), dry aggregates greater than 2 mm (AGG >2 mm), dry aggregates less than 0.25 mm (AGG <0.25 mm), available water capacity (AWC), soil organic matter (SOM), permanganate oxidizable carbon (POXC), soil bulk density (BD), soil electrical conductivity (EC), pH, nitrate-nitrogen (NO3-N), extractable potassium (K), extractable phosphorus (P), calcium (Ca), magnesium (Mg), sodium adsorption ratio (SAR), and micronutrients (zinc, iron, copper, and manganese). Out of the 21 soil measurements, 15 varied significantly with the time-of-sampling within a year, although there were no consistent trends in variability. However, only a few measurements differed significantly with the crop management practices tested. Wet aggregate stability, MWD, AWC, and BD were significantly higher in the summer, while POXC and SOM were significantly higher in the fall and winter, respectively. Soil quality indicators such as NO3-N, K, and P decreased significantly during the spring. This study shows that the seasonal variability of the soil measurements can be significant in the arid agro-ecosystems, with the magnitude of variation depending on the measurement type. The soil managers in the region need to account for this variability, in order to be able to assess the changes in the soil quality. Also, because of the variability that can occur across the different sampling dates within a year, it is advisable to sample during the same period every year, for a consistent interpretation of the directional changes of the soil quality indicators.

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Section: Introductionmentioning

confidence: 99%

Seasonal Changes of Soil Quality Indicators in Selected Arid Cropping Systems

et al. 2018

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“…In Ultisol, Camargo et al [14] adjusted for a spherical model for bulk density. In Cambisols studied by Rabbi et al [15], they observed a spherical fit to the bulk density and the sand, silt, and clay.…”

Section: Resultsmentioning

confidence: 99%

“…Rabbi et al [15] selected, through geostatistics techniques, soil quality index maps using a combination of physical attributes, such as bulk density, sand, silt, and clay, that can be used to evaluate the spatial variability of soil physical quality in an agricultural field.…”

Section: Introductionmentioning

confidence: 99%

Spatial Dependence of Physical Attributes and Mechanical Properties of Ultisol in a Sugarcane Field

Tavares

Rolim

Oliveira

et al. 2015

The Scientific World Journal

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This study investigates the effect of conventional tillage and application of the monoculture of sugar cane on soil health. Variables like density, moisture, texture, consistency limits, and preconsolidation stress were taken as indicators of soil quality. The measurements were made at a 120 × 120 m field cropped with sugar cane under conventional tillage. The objective of this work was to characterize the soil and to study the spatial dependence of the physical and mechanical attributes. Then, undisturbed soil samples were collected to measure bulk density, moisture content and preconsolidation stress and disturbed soil samples for classification of soil texture, and consistency limits. The soil texture indicated that soil can be characterized as sandy clay soil and a sandy clay loam soil, and the consistency limits indicated that the soil presents an inorganic low plasticity clay. The preconsolidation tests tillage in soil moisture content around 19% should be avoided or should be chosen a management of soil with lighter vehicles in this moisture content, to avoid risk of compaction. Using geostatistical techniques mapping was possible to identify areas of greatest conservation soil and greater disturbance of the ground.

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“…Physical soil quality indices were selected as indicated by Rabbi et al (2014). The indices are as follows: clay content is less than or equal to 40%, and bulk density ranges between 0.9 and 1.2 g/cm 3 .…”

Section: Spatial Datamentioning

confidence: 99%

Assessment of methods to determine soil characteristics for management and design of irrigation systems

Valdivia-Cea¹,

Holzapfel²,

Rivera³

et al. 2017

J. Soil Sci. Plant Nutr.

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Irrigation system design and irrigation management require appropriate match of the soil and type of crop. In Chile, agrological reports are currently being used to determine the homogeneity of soil units and land capability classes: fruit tree production vs orchard design. Agrological studies use a number of soil characteristics, but these do not include hydrophysical properties, which are essential when zoning for irrigation. Therefore, it is necessary to establish a methodology to objectively evaluate soils, based on a quantitative analysis that includes hydrophysical parameters. In this study, different methodologies are proposed for classifying homogenous soil units based on extensive field sampling. The field data was evaluated using two methodologies: 1) the SAG-USDA Manual and 2) in situ sampling of soil's hydrophysical properties and pedotransfer models. There were differences between the methodologies regarding zoning soil properties for irrigation system design and management. The methodology based on the SAG-USDA Manual requires auxiliary data in order to provide useful maps for design and management of irrigation systems. Published pedotransfer functions should be carefully assess before their use in large-scale design, as the quality the estimations depends on the data used to derive the equations. Therefore, if field data is available, we recommend calibrating equations using well-known statistical methods such as least square. In this study, the functions obtained describe the properties of interest properly, such as the field capacity for design of micro-irrigation systems. However, predicting wilting point did not give reliable results.

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Spatial Variability of Physical Soil Quality Index of an Agricultural Field

Cited by 12 publications

References 20 publications

Seasonal Changes of Soil Quality Indicators in Selected Arid Cropping Systems

Seasonal Changes of Soil Quality Indicators in Selected Arid Cropping Systems

Spatial Dependence of Physical Attributes and Mechanical Properties of Ultisol in a Sugarcane Field

Assessment of methods to determine soil characteristics for management and design of irrigation systems

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