Characterization and classification of soils of Yikalo Subwatershed in Lay Gayint District, Northwestern Highlands of Ethiopia

Fekadu, Endalkachew; Kibret, Kibebew; Bedadi, Bobe; Melese, Asmare

doi:10.18393/ejss.376267

Cited by 23 publications

(30 citation statements)

References 23 publications

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“…According to AP rating suggested by Cottenie [ 43 ], all land use types are found to contain very low to low (<5 and 5–9 mg/kg, respectively) AP values except forest lands, which contain medium (10–17 mg/kg) AP values. The low soil AP contents observed in the watershed are in agreement with the results reported by Fekadu and colleagues [ 44 ], who reported that the availability of P in most Ethiopian soils has been declining due to fixation, crop removal, and erosion. Weathered soil minerals, organic fertilizer, and inorganic fertilizer are important pools of soil P [ 45 ].…”

Section: Discussionsupporting

confidence: 91%

Land Use and Land Cover Dynamics and Properties of Soils under Different Land Uses in the Tejibara Watershed, Ethiopia

Fentie

Jembere

Fekadu

et al. 2020

The Scientific World Journal

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Land use changes have long been considered among many factors responsible for physical and chemical soil degradation. This study was conducted to evaluate land use and land cover (LULC) changes and their cumulative effects over 30 years (from 1989 to 2019) on the current physical and chemical properties of soils in the Tejibara watershed, Ethiopia. Image analysis and LULC classifications were performed using ERDAS IMAGINE 2014 and ArcGIS 10.4 software, respectively. For the determination of soil properties, four land use types (natural forest, eucalyptus plantation, cultivated, and grazing lands) and two soil depths (0–20 and 20–40 cm) were used. Triplicate composite soil samples were collected from each land use type and soil depths. For the determination of physical (texture and bulk density) and chemical soil properties such as electrical conductivity (EC), organic matter (OM), total nitrogen (TN), and available phosphorus (AP), standard laboratory procedures were employed. The image analysis results for all of the years studied show that cultivated lands have increased in area at the expense of forest and grazing lands. Silt content, clay content, AP, and pH were significantly affected by land use as the main effect while the interaction effects of soil depth and land use were significant for total N and OM only. The highest (10.1 mg/kg) and the lowest (4.9 mg/kg) AP contents were observed in the forest and the grazing lands, respectively. Soil total N content was highest in the forest lands (0.32%) and lowest in cultivated lands (0.06%). Concerning OM content, the highest (11.0%) and the lowest (0.8%) values were recorded in the forest and cultivated lands, respectively. Generally, this study showed that land use changes have reduced the areal coverage by forest and grazing lands and have negatively affected the soil properties. This implies that land use change without soil fertility measures that are appropriate to the area could cause enhanced land degradation and thereby reduce the productivity of the study area soils.

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Section: Discussionsupporting

confidence: 91%

Land Use and Land Cover Dynamics and Properties of Soils under Different Land Uses in the Tejibara Watershed, Ethiopia

Fentie

Jembere

Fekadu

et al. 2020

The Scientific World Journal

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“…The grade of surface horizons were weak and their shape was changed from granular to sub angular blocky, which implies that an existence of surface organic matter. This Finding is in agreement with Fekadu et al (2018) who reported that the presence of OM in the surface soil might be attributed to the formation of granular type of soil. The consistence of soils was slightly hard to hard at dry and slightly friable in the surface horizons of all the pedons when it was in moist, whereas wet consistency varied from sticky and plastic in the meddle slope to very sticky and very plastic in the toe slope position.…”

Section: Soil Structure and Consistencesupporting

confidence: 93%

“…According to Tekalign (1991), the total N contents of the surface layers of pedons 1, 2, and 3 were rated as medium (0.12 to 0.25%) while it was rates as high (> 0.25%) in the surface soil layer of pedon 4. This result is in agreement with the findings of Zeleke and Kibebew (2009), Assen and Yilma (2010);and Fekadu et al (2018) who reported that the direct relation of total N and soil OM as well as high surface OM compared to subsurface soil layer which related with surface biomass. The carbon to nitrogen (C:N) ratio of soils ranged from narrow to the medium range (8:1 to 12:1) which could not adversely affect the mineralization processes (Havlin et al, 1999).…”

Section: Total Nitrogen and Carbon To Nitrogen Ratio (C:n)supporting

confidence: 93%

“…Relatively, the higher exchangeable acidity at the pedon 2 in the BC-horizon, under cultivated land could be ascribed to the intensive cropping which causes removal of basic cations via crop harvest since the crop might be release the H + during uptake of others basic cation in order to keep the natural balance of colloidal surface. Different researches were confirmed these factors those increased exchangeable acidity in the soil mainly enhancing depletion of basic cations especially in surface horizons (Alem et al, 2015;Yitbarek et al, 2016;Fekadu et al, 2018).The percent of base saturation in the study area ranged from 4.11 to 24.30% (Table 5). According to Hazelton and Murphy (2007), PBS was in the range of very low rate.…”

Section: Exchangeable Acidity and Percent Base Saturationmentioning

confidence: 71%

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Characterization and Classification of Soils of Askate Sub-watershed, South Wollo Zone, Northeastern Ethiopia

Tufa¹

2021

JBAH

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Information on soil is an essential in sustainable utilization of soil resources and sound land use planning. Therefore, this study was conducted with the objective of characterization and classification of soil on Askate sub-watershed, northeastern Ethiopia. Four representative soil pedons were opened along topographic position and described on each identified genetic horizons basis on the field for their morphological characteristics following the soil field description guidelines. The morphological properties were examined in the field while physical and chemical properties were analyzed in laboratory. The results of the study were revealed variation in morphological, physical, and chemical properties of the soils. Soil textural classes were sandy loam to loam sandy. The bulk density ranged from 1.04 to 1.60 g cm-3. The soil reaction rated as slightly acidic to moderate acidic (5.4 to 6.7). The OM ranged from 0.41 to 3.23% while available P ranged from 0.72 to 9.36 mg kg-1 which was low to medium rate. The exchangeable bases ranged from low to medium rate in the study area. CEC was medium to high rate, which implies the medium nutrient reservoir of the soil. Finally, three soil types, Humic Cambisols, Haplic Luvisol, and Cambic Umbrisols were identified in the study area according to World Reference Base. Using the soils according to their potential and applications of optimum organic and inorganic fertilizers are essential to keep the sustainability of soil fertility for better crop production and productivity.

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“…In the study area, surface soil colour patterns showed great variability. This may be related to position in the landscape, slope gradient and organic matter contents (Abate et al, 2014;Hailu et al, 2015, Fekadu et al, 2018. The soil colour patterns of the described profiles (profiles 1, 2, 3, 4 and 5) have become uniformly redder with depth.…”

Section: Site and Morphological Characteristicsmentioning

confidence: 92%

Determination of physico-chemical properties and agricultural potentials of soils in Tembaro District, KembataTembaro Zone, Southern Ethiopia

Lelago

Buraka

2019

Eurasian Journal of Soil Science (Ejss)

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The objectives of this study were to classify the soils of Tembaro district, and to identify its potentials for crop production. Five pits representing a pedon each were opened and profile in each pit was described for its morphological, physical and chemical characteristics according to standard procedures. A total of 20 disturbed soil samples and 16 core ring samples were collected from five representative profiles. The samples were analyzed in the laboratory for texture, BD, FC, PWP, Soil pH, EC, OC, TN, av.P, av.K, exchangeable bases, free and active iron and CEC. The results showed that the proportions of soil separates varied among profile and depth however, soils were all in clay textural class. The BD varied from 1.02 in the surface profile 1 to 1.25 g.cm-3 in the profile 3. Soil pH ranged from 6.8 to 5.4 in the surface horizons of all profiles with further decrease with depth indicating that the soils in the watershed are slightly acidic to moderately acidic. The OM and TN contents ranged from 2.90 to 5.43 and 0.23 to 0.45% in the surface horizon and they were in the low, low to medium and high categories respectively. The corresponding values for the remaining subsoil horizons were in the low categories. In all cases the contents of these parameters decreased considerably with depths. Available P was below critical values for all profiles and depths except for profiles 1 and 4. Exchangeable K was above critical value in all profiles with increasing trend along with depth of all profiles. Exchangeable Mg varied from 2.47 in surface horizon of profile 3 to 3.98 cmolc kg-1 in the surface horizons of profile 4 and increased with depth in all profiles except in profile 1. The observation with exchangeable K and Mg implies that there is leaching phenomenon in the study area. Ca ranged from 4. 35 cmolc kg-1 in profile 5 to 16.50 cmolc kg-1 in profile 1 with inconsistent trend with depth. The CEC from 18.22 cmolc kg-1 soil in surface horizon of profile 5 to 27.43 cmolc kg-1 soil in the surface horizons of profile 1 indicating they are in the medium to high ranges. But inconsistent trend in CEC distribution was observed with depth in all profiles. Based on the data collected from profile description study and soil physicochemical analytical data and according to FAO-WRD soil classification legend, the soil at Ambukuna watershed were classified as Haplic Nitisols (Endoeutric, humic), Haplic Nitisols (Hypereutric, humic), Haplic Nitisols (Endoeutric) and Haplic Nitisols (Epidystric, Humic). Most of the soil physical and some of the chemical characteristics studied could be ranked as good indicating that the area has high potential for agricultural production.

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Characterization and classification of soils of Yikalo Subwatershed in Lay Gayint District, Northwestern Highlands of Ethiopia

Cited by 23 publications

References 23 publications

Land Use and Land Cover Dynamics and Properties of Soils under Different Land Uses in the Tejibara Watershed, Ethiopia

Land Use and Land Cover Dynamics and Properties of Soils under Different Land Uses in the Tejibara Watershed, Ethiopia

Characterization and Classification of Soils of Askate Sub-watershed, South Wollo Zone, Northeastern Ethiopia

Determination of physico-chemical properties and agricultural potentials of soils in Tembaro District, KembataTembaro Zone, Southern Ethiopia

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