Pedological Characterization of Typical Soil of Dakawa Irrigation Scheme, Mvomero District, Morogoro Region, Tanzania

Mbaga, Halima Rashid; Msanya, Balthazar M.; Mrema, Jerome

doi:10.20546/ijcrbp.2017.406.009

Cited by 12 publications

(20 citation statements)

References 6 publications

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“…Moreover, the same profile contained many, medium, hard, round Fe concretions/nodules. The occurrence of redoximorphic features in form of mottles and Fe concretions/nodules in this profile may be attributed to redox conditions in the profile resulting from Similar observations were made elsewhere in Tanzania for similar soils by [34] and [35]. In profile HIS-P3 prominent shiny slickensides and deep wide cracks were observed.…”

Section: Soil Morphology and Genesissupporting

confidence: 81%

Pedological Characterization of Typical Soils of Dodoma Capital City District, Tanzania: Soil Morphology, Physico-chemical Properties, Classification and Soil Fertility Trends

Msanya¹,

Mwasyika²,

Amuri³

et al. 2018

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Pedolological characterization was done in Dodoma Capital City District, Tanzania. Three soil profiles developed from in-situ weathering of granic rocks and designated as HIS-P1, HIS-P2 and HIS-P3 were described. Fifteen samples were taken from genetic horizons and analyzed for physical and chemical characteristics. The soils were generally very deep, with varying textures. Whereas profile HIS-P2 was dominantly loamy, profiles HIS-P1 and HIS-P3 were both clayey but the latter had heavy clay type. In profile HIS-P1, clay eluviation-illuviation was a dominant pedogenic process manifested by presence of clay cutans in the subsoil. Profile HIS-P2 displayed redoximorphic features due to fluctuating water table. Shrinking and swelling, and argilli-pedoturbation were typical pedogenic processes in profile HIS-P3. Profile HIS-P1 had more developed structure (subangular blocky) followed by HIS-P3 and lastly profile HIS-P2 which was structureless massive breaking into weak subangular blocks. Whereas topsoil bulk density values of the soils were within acceptable range, subsoil BD values are likely to cause problems of root penetration particularly for deep rooted crops. Profiles HIS-P1 and HIS-P3 may present limitations to crop growth due to high pH values (> 7.5) in the subsoil which may limit availability of plant nutrients e.g. phosphorus. Organic carbon and nitrogen were generally low and very low in all profiles with most values being < 1.25% and < 0.10%, respectively. Availabe P values were low to very low (< 7 mg/kg) throughout the three profiles. Topsoil base saturation values were high (> 50%) in profiles HIS-P1 and HIS-P2 but very high throughout proflie HIS-P3 (83-118%). Zn and Fe levels were rated as inadequate for crop production. According to USDA Soil Taxonomy, the soils were classified as Typic Rhodustults (HIS-P1), Fluventic Dystrustepts (HIS-P2) and Chromic Calcitorrerts (HIS-P3) corresponding to Haplic Cutanic Acrisols, Haplic Cambisols and Calcic Mazic Vertisols in the WRB for Soil Resources. The three soils had different physico-chemical properties, hence the need to characterize soils before fertilizer recommendations is met.

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Section: Soil Morphology and Genesissupporting

confidence: 81%

Pedological Characterization of Typical Soils of Dodoma Capital City District, Tanzania: Soil Morphology, Physico-chemical Properties, Classification and Soil Fertility Trends

Msanya¹,

Mwasyika²,

Amuri³

et al. 2018

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“…However, Inyala and Uyole had very low to low organic carbon and organic matter contents with values 0.12% and 0.22%, respectively. Generally, the trends indicate that the OC is decreasing with an increasing depth; in topsoils higher values are observed than in the subsoils; probably this is attributed to accumulation of plant residues on the topsoils [21]. These results provide the same trend as the results of a study on volcanic soils of some districts of Mbeya region, Tanzania [23,24].…”

Section: Organic Carbon and Organic Matter Contentssupporting

confidence: 73%

“…Micronutrients Fe, Cu, Mn and Zn were determined by DTPA method. The determination by atomic adsorption spectrophotometer was done using standard atomic adsorption procedures [3,21]. The electrical conductivity was determined in 1:2.5 soils:water suspensions using an electrical conductivity meter [22].…”

Section: Laboratory Methodsmentioning

confidence: 99%

Pedology at Four Representative Sites of Southern Highland Zone of Tanzania

Mtama¹

2018

AJAF

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To study the soils of Southern Highland Zone of Tanzania, four representative pedons of some landscapes were characterized. Their names and identifiers are Seatondale, Mbimba, Inyala, and Uyole, respectively TzSea 01, TzMb 02, TzIny 03, and TzUy04. The pedons were formed from the weathering of among other materials, colluvial igneous rocks, alluvium, eluvial soils, laterite, lacustrine sands and silts, andesite, pumice, aeolian deposits, and metamorphic rocks including coarse grained and strongly foliated biotite gneisses. Twenty soil samples were taken for laboratory characterization. In addition to classical horizon by horizon descriptions and laboratory analyses, 12 core samples were taken for soil-water retention characterization. The available water holding capacity was rated as very low to low. Pedon descriptions and particle size analysis showed clay eluviation-illuviation was the predominant pedogenic process in all pedons. Soil pH was rated slightly acidic to slightly alkaline. Available P ranged from 0.71 mg/kg at Mbimba to 10.67 mg/kg at Seatondale. Exchangeable bases were variable across and within the profiles; at Uyole and Inyala they were high, while at Seatondale and Mbimba they were low and medium. Values of exchangeable bases showed decreasing trends with profile depths in all sites. C/N ratios ranged between 6 and 18, total nitrogen was rated very low to low in both A and B horizons. CEC soil ranged between 17.2 and 36.4 cmol (+) /kg. Organic carbon ranged from very low to high. The soils apparently developed from extreme and moderate weathering of parent materials. According to the USDA Soil Taxonomy, the pedons classified as Fine, Illitic, Active,

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“…Pedological characterization provides vital information and knowledge on soil characteristics and gives a clear understanding on soil genesis, morphology, classification and spatial distribution of soils in an area [3,1,4,5,6,7]. Soil characterization data helps in the correct classification of the soil to serve as a basis for a more detailed evaluation of the soil as well as gather preliminary information on nutrient, physical or other limitations needed to produce a capability class for crop production [8,2,4].…”

Section: Introductionmentioning

confidence: 99%

“…Soil characterization data helps in the correct classification of the soil to serve as a basis for a more detailed evaluation of the soil as well as gather preliminary information on nutrient, physical or other limitations needed to produce a capability class for crop production [8,2,4]. Pedological information is important to land users especially farmers who use the data to decide on what crops and management practices are best suited for the optimal and sustainable production of crops [6].…”

Section: Introductionmentioning

confidence: 99%

Soil Morphology, Physico-chemical Properties, Classification and Potential of Selected Soils in Kenya

Karuma¹

2019

IJPSS

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Four soil profiles (Yala, Galana, Baringo and Bondo) that represent different ecology, physiography and pedological variability were described to study their morphology, soil physico-chemical characteristics and to classify them using two internationally known soil classification systems. Soil samples were taken from designated pedogenic horizons for physical and chemical analysis in the laboratory. These soils are deep to very deep (> 110 cm) and well-drained except in Galana which was imperfectly drained, with varying textures. In Bondo, the soils are moderately acid (pH 5.6 -6). In Baringo, the soil profile is acidic (< 5.0) while in Galana moderately alkaline (pH 7.3 -8.3) and Yala soils are moderate to strongly acid (5.1 -5.7). The organic carbon (< 0.6%) and organic matter levels (1 -2%) were low and decreased down the profiles in all. The soils have low to moderate fertility. The base saturation of the studied soils is rated as very high (> 80%) in Galana and Baringo and low (< 50%) in Yala and Bondo pedons. The soils are non-saline as indicated by the low values of electrical conductivity (< 1.7dS/m) in the pedons. The soils are non-sodic (ESP < 6%) in Bondo and Yala, however moderately sodic (ESP 11-15%) in Galana and Baringo. Ochric horizon was the main diagnostic epipedon while ferralic, argillic and cambic horizons were the diagnostic B horizons. According to USDA Soil Taxonomy, the soils were classified as Typic 2 Haplustox (Yala), Typic Haplocalcids (Galana), Typic Eutrudepts (Baringo) and Plinthic Haplustults (Bondo) corresponding to Haplic Ferralsols, Luvic Calcisols, Haplic Cambisol and Cutanic Plinthic Acrisols in the WRB for Soil Resources. The general fertility of the soils of the areas is discussed highlighting their potentials and constraints.

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Pedological Characterization of Typical Soil of Dakawa Irrigation Scheme, Mvomero District, Morogoro Region, Tanzania

Cited by 12 publications

References 6 publications

Pedological Characterization of Typical Soils of Dodoma Capital City District, Tanzania: Soil Morphology, Physico-chemical Properties, Classification and Soil Fertility Trends

Pedological Characterization of Typical Soils of Dodoma Capital City District, Tanzania: Soil Morphology, Physico-chemical Properties, Classification and Soil Fertility Trends

Pedology at Four Representative Sites of Southern Highland Zone of Tanzania

Soil Morphology, Physico-chemical Properties, Classification and Potential of Selected Soils in Kenya

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