Sealing Index, Air-filled Porosity and Hydrological Behaviour of a Tropical Ultisol as Affected by Incidental Flooding and Soil Disturbance

Udom, B. E.; Kamalu, O.J.

doi:10.3923/ijss.2016.79.86

Cited by 5 publications

(7 citation statements)

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“…The crust formation is associated with low organic matter (OM) content and a high percentage of silt (Lal, 1989;Valentin and Bresson, 1997). As monitoring changes in permeability and soil aggregate stability are often time-consuming and costly; various indices were developed for predicting soil crusting using more available data such as soil texture and organic matter content (Udom and Kamalu, 2016). We compared two indices, namely, Sealing Index (SI) (Valentin and Bresson, 1997) and Crusting Index (CI) (FAO, 1978).…”

mentioning

confidence: 99%

Deforestation effects on soil erosion rates and soil physicochemical properties in Iran: a case study of using fallout radionuclides in a Chernobyl contaminated area

Khodadadi

Alewell

Mirzaei

et al. 2021

Preprint

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Abstract. Deforestation for farming and grazing purposes has become a global challenge. To study the impact of deforestation on soil erosion rates and soil physicochemical properties, Zarivar Lake watershed, Kurdestan Province, Iran, was selected. Converting the steep hillslopes naturally under oak forest to rainfed vineyards has been one of the most common land-use changes in the area. We used 137Cs and 210Pbex radionuclides and quantified the Chernobyl-derived 137Cs fallout with 239+240Pu. The soil samples were collected from two adjacent and similar hillslopes, one of which is under natural forest, while the other is under rainfed vineyard. Using 137Cs/239+240Pu rates and a simple unmixing of the 137Cs sources indicated that 50.2 ± 10.0 % of 137Cs was Chernobyl-derived. The mean reference inventory values of 137Cs, 210Pbex, and 239+240Pu were estimated to be at 6152 ± 1266, 6079 ± 1511, and 135 ± 31 Bq m−2, respectively. At the forested hillslope, net soil erosion rates based on 137Cs, and 210Pbex, techniques were estimated to be at 5.0 and 5.9 Mg ha−1 yr−1, respectively, resulting in Sediment Delivery Ratios (SDRs) of 96 and 70 %. However, at the vineyard hillslope, the net soil redistribution rates were at 25.9 and 32.5 Mg ha−1 yr−1 for 137Cs and 210Pbex, respectively, resulting in respective SDRs of around 95 and 92 %. Both 137Cs and 210Pbex indicated that as a result of deforestation, soil erosion has increased by approximately five times. Percolation Stabilities (PS) in forest and vineyard topsoil are about 309 and 160 gr H2O 600 s−1 classified as rapid and moderate PSs, respectively. Rapid PS in forest soil implies high aggregate stability, whereas moderate PS in vineyard soils indicates that they are generally weakly-structured. All in all, the results of the present study revealed that deforestation and converting natural vegetation to cropland prompted soil loss and deteriorated physicochemical properties of the soil.

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confidence: 99%

Deforestation effects on soil erosion rates and soil physicochemical properties in Iran: a case study of using fallout radionuclides in a Chernobyl contaminated area

Khodadadi

Alewell

Mirzaei

et al. 2021

Preprint

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“…This may be due to manure application in VC than in FC and FT. Plant residues accumulation is higher in soils cultivated with vegetables than other soils (John et al 2005). High content of fine fractions in soils cultivated with vegetables favors organic matter accumulation (Brock et al 2011;Fayed and Rateb, 2013;Udom and Kamalu, 2016). Long-term of cultivation systems had varying (p < 0.05) effects on soil texture as shown in Table 1.…”

Section: Resultsmentioning

confidence: 95%

“…Soil was fine through the entire layers with high clay and silt contents. Texture ranges from clay, silty clay loam and clay loam, and variations were relatively slight (Udom and Kamalu, 2016), probably due to migration of fine particles from surface layer to the subsurface layers (Risikesh et al 2011). Soils VC and FC have higher content of fine particles than FT in the surface layer; probably due to application of organic manure for vegetables (Kalhoro et al 2017).…”

Section: Resultsmentioning

confidence: 99%

“…The soils in general showed a high crusting or sealing risk in all cultivation systems (Van der Watt and Classens, 1990). This is due to the low organic matter content (Udom and Adesodun, 2016;Udom and Kamalu, 2016). Soil sealing index (SI) was affected by cultivation systems (p <0.05).…”

Section: Soil Sealing Indexmentioning

confidence: 99%

“…Soil sealing index (SI) controls water movement and retention and determine the amount of water stored in soil (Barthes and Roose, 2002). Soil properties affecting soil sealing are texture, organic matter and structure (Udom and Kamalu, 2016). Soil properties like bulk density (BD), penetration resistance (PR), saturated hydraulic conductivity (Ks) and soil water content (SWC) are widely used as soil quality indicators for the assessment of agricultural systems and soil physical degradation (Fernandez-Galvez et al 2012 andMoncada et al 2014).…”

Section: Introductionmentioning

confidence: 99%

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Soil Shrinkage, Sealing Index and Hydro-Physical Properties of Vertisols as Influenced by Long-Term Cultivation Systems in Northern Egypt

Bassouny

2018

Journal of Soil Sciences and Agricultural Engineering

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Soil shrinkage and sealing index are important for understanding water and solute transport in soils. Effects of long-term cultivation systems on the soil shrinkage, sealing and hydro-physical properties of Vertisols in Kafr El-Sheikh Governorate, Northern Egypt were studied. The cultivation systems were fruit trees (FT), field crops (FC), vegetables crops (VC), and noncultivated soil (NC). Forty eight samples were collected from sixteen soil profiles (three layers: 0-30, 30-60 and 60-100 cm) from different locations. The studied parameters included coefficient of linear extensibility (COLE), shrinkage ratio (SR), potential linear extensibility (PLE), soil sealing index (SI), bulk density (BD), penetration resistance (PR), saturated hydraulic conductivity (Ks) and soil water content (SWC). Long-term cultivation improved soil shrinkage, sealing and hydro-physical properties. Soil organic matter (SOM) and silt + clay contents increased in VC and FC compared with FT and NC systems in all layers (p < 0.05). The BD and PR decreased in all systems, and in VC and FC systems it was prominent compared with NC system. Ks and SWC increased (p <0.05) under VC and FC than in NC system. Low COLE, SR and PLE occurred in all systems particularly in VC and FC system. The VC and FC reduced shrinkage hazards, while high COLE, SR and PLE occurred in NC, indicating shrinkage hazards. The SI was significantly (p <0.05) affected by cultivation systems and sealing was low in soils of VC, FC and FT than NC. Each of COLE, SR and PLE showed a negative correlation (p < 0.01) with SOM, but a positive one with BD and PR (p < 0.01). Each of COLE and SR (p < 0.05) and PLE (p < 0.01) showed negative correlations with SWC and Ks. SI showed a negative correlation with each of COLE, SR, BD and PR (p < 0.01) and PLE (p < 0.05), and a positive one with SWC and Ks (p < 0.05). VC and FC improved the soil shrinkage, sealing index and hydro-physical properties of Vertisols.

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Spatial cross-correlation of surface soil physicochemical properties with soil erosion estimated by fallout radionuclides in croplands in a semi-humid region of Iran

Khodadadi,

Meusburger,

Mirzaei

et al. 2024

CATENA

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Sealing Index, Air-filled Porosity and Hydrological Behaviour of a Tropical Ultisol as Affected by Incidental Flooding and Soil Disturbance

Cited by 5 publications

References 15 publications

Deforestation effects on soil erosion rates and soil physicochemical properties in Iran: a case study of using fallout radionuclides in a Chernobyl contaminated area

Deforestation effects on soil erosion rates and soil physicochemical properties in Iran: a case study of using fallout radionuclides in a Chernobyl contaminated area

Soil Shrinkage, Sealing Index and Hydro-Physical Properties of Vertisols as Influenced by Long-Term Cultivation Systems in Northern Egypt

Spatial cross-correlation of surface soil physicochemical properties with soil erosion estimated by fallout radionuclides in croplands in a semi-humid region of Iran

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