Land capability classification of some western desert Oases, Egypt, using remote sensing and GIS

Gad, A.

doi:10.1016/j.ejrs.2015.06.002

Cited by 21 publications

(25 citation statements)

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“…The soil of the Kharga Oasis relates primarily to the different parent materials derived from pre‐existing sediments of fluvial origin mixed with windborne material (Elgabaly & Khadr, ). The soil in the depressions is classified as Chromic Haplotorrert or Typic Haplotorrert with moderate capability to produce common cultivated crops, whereas the soil on the depression margins is classified as Typic Torripsamment with very severe limitations for crop cultivation (USDA, ; Gad, ).…”

Section: Methodsmentioning

confidence: 99%

Experimental and statistical study of saturated hydraulic conductivity and relations with other soil properties of a desert soil

Gamie

Smedt

2017

European J Soil Science

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Agricultural expansion in the Kharga Oasis, in the western desert of Egypt, depends strongly on irrigation. Soil hydraulic conductivity is therefore a key property for reclaiming desert land and planning irrigation schemes. Soil samples collected at 10‐m intervals in a 120 m by 120 m plot were analysed for hydraulic conductivity together with 12 other basic physical and chemical soil properties. The resulting data were analysed statistically using Pearson correlation, principal component analysis and linear regression. The hydraulic conductivity values varied over four orders of magnitude and, because of the saline–sodic nature of the soil, were about two orders of magnitude smaller than what is generally reported in the literature for similar soil textures. Results showed that the hydraulic conductivity was correlated significantly with soil variables that relate to soil structure, such as wilting point, field capacity and SAR, and less to variables that relate to soil texture, such as silt and clay fractions. Pedotransfer functions for hydraulic conductivity were derived by stepwise multiple linear regression and fitted by residual maximum likelihood. The first model was based directly on soil properties, whereas the second model was based on principal components. Both models showed that part of the variation in hydraulic conductivity encountered in the field could be explained, but with large uncertainty probably resulting from sampling and measurement errors, randomness and soil heterogeneity, or other soil properties that were not observed. The most significant predictors for the first model were wilting point, SAR and silt fraction. The second model used the first two principal components of the soil variables as predictors, the first one related to soil structure and the second to soil texture. Highlights We analysed relations between saturated hydraulic conductivity and other basic soil properties. Principal component analysis showed that the variation in hydraulic conductivity is related to soil structure. A pedotransfer function predicted hydraulic conductivity from wilting point, sodium adsorption ratio and silt fraction. A pedotransfer function was derived from principal components one and two related to structure and texture, respectively.

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Section: Methodsmentioning

confidence: 99%

Experimental and statistical study of saturated hydraulic conductivity and relations with other soil properties of a desert soil

Gamie

Smedt

2017

European J Soil Science

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“…Land 2021, 10, 458 2 of 23 Heat stress and drought conditions threaten the productivity of crops globally through negative impacts on plant growth, physiology and reproduction [4][5][6]. Average temperatures in Africa are projected to rise faster than the global average with some of the highest increases in temperature to be experienced by the Sahel region [7].…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Approaches to Regional Land-Use Capability Analysis for Agricultural Land-Planning

Ippolito

Dossa

Garba

et al. 2021

Land

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Smallholder agriculture is a major source of income and food for developing nations. With more frequent drought and increasing scarcity of arable land, more accurate land-use planning tools are needed to allocate land resources to support regional agricultural activity. To address this need, we created Land Capability Classification (LCC) system maps using data from two digital soil maps, which were compared with measurements from 1305 field sites in the Dosso region of Niger. Based on these, we developed 250 m gridded maps of LCC values across the region. Across the region, land is severely limited for agricultural use because of low available water-holding capacity (AWC) that limits dry season agricultural potential, especially without irrigation, and requires more frequent irrigation where supplemental water is available. If the AWC limitation is removed in the LCC algorithm (i.e., simulating the use of sufficient irrigation or a much higher and more evenly distributed rainfall), the dominant limitations become less severe and more spatially varied. Finally, we used additional soil fertility data from the field samples to illustrate the value of collecting contemporary data for dynamic soil properties that are critical for crop production, including soil organic carbon, phosphorus and nitrogen.

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“…Wells (2001) believes land capability is ''the ability of the land to support a particular type of use without causing permanent damage''. The land capability classification creates a guideline for the evaluation of soil restriction and land management suggestions for use at different scales including state, area, and the exclusivity planning level [6]. Sustainable development can be achieved when land is to be used suited to its potentials and capabilities.…”

Section: Land Capabilitymentioning

confidence: 99%

Land Suitability Evaluation to Determine the Appropriate Areas of Development: A Case Study of Hormuz Island

Ahmadi¹,

Mosammam²,

Mirzaei³

2017

OJE

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One of the basic prerequisites for the development of spatial programs and policies is evaluating the land suitability for future land uses based on the principals of ecological sustainability. This analysis is critical in islands due to special characteristics such as limited natural resources, interdependent and more complex ecosystems, high vulnerability to natural hazards, climate change and economic vulnerability. Accordingly, this paper based on the ecological approach and using Geographic Information System software package and Analytic Hierarchy Process and developing appropriate criteria has analyzed the land suitability of Hormuz Island. The findings clearly show the land suitability to develop industrial, agriculture, tourism land uses and can be the basis for planning the future development of the island based on the ecological sustainability.

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Land capability classification of some western desert Oases, Egypt, using remote sensing and GIS

Cited by 21 publications

References 0 publications

Experimental and statistical study of saturated hydraulic conductivity and relations with other soil properties of a desert soil

Experimental and statistical study of saturated hydraulic conductivity and relations with other soil properties of a desert soil

A Comparison of Approaches to Regional Land-Use Capability Analysis for Agricultural Land-Planning

Land Suitability Evaluation to Determine the Appropriate Areas of Development: A Case Study of Hormuz Island

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