Characterization and agricultural potentials of some pedons derived from sand stone parent rock near Abeokuta, Southwestern Nigeria

Abstract

Successful crop production requires the knowledge of soil variation and the evaluation of the agricultural potentials of the land. Detailed land resource survey of approximately 100 ha land in Abeokuta North Local Government Area of Ogun State was carried out. Identified soil mapping units were examined in modal profiles. The soils were classified using the USDA Soil Taxonomy, FAO/IUSS World Reference Base (WRB) system and local soil series methods. Five soil mapping units were identified and were classified as Ilaro Series (Kanhaplic Haplustalf), Ibeshe (Typic Kandiustalf), Kulfo (Udic Kandiustalf), Molo (Rhodic Kandiustalf) and Otteyi Series (Lithic Haplustept). The soils were classified as Alfisols (71.56%) and Inceptisols (28.44%). Land Capability Classification (LCC) revealed that Ilaro, Ibeshe and Molo series belong to Capability Class II while Kulfo series was Class III but Otteyi series is of non-arable Class VI. Otteyyi Series had severe limitations of very shallow soil depth, high slope gradient and high gravel content. The area has good potential for crop production if soil fertility can be managed with appropriate fertilizer application and seasonal water deficit ameliorated by supplemental irrigation. Otteyi Series that is non-arable could be used for farm buildings and other physical infrastructures or animal grazing.

Assessment of Heavy Metal Contamination in Wetlands Soils Around an Industrial Area Using Combined GIS-Based Pollution Indices and Remote Sensing Techniques

“…The soil's parent material is derived from the sedimentary rocks underlain by sands, and clays, (Olabode & Mohammed, 2016). The parent material of the studied soils is sedimentary with Ustic moisture regime and possesses 1:1 lattice clay (>50% base saturation) minerals ( J. R. Orimoloye et al, 2019). They are characterized as ferrugenized clay mottled and designated as Typic Kandiustalf according to USDA Soil Taxonomy System (2022).…”

“…The soil depth of the area reflects in-situ clay formation or migration with weak angular blocky/sub-angular on the ped surfaces and characterized by dark grayish brown color. The soil textural class ranged between clay and sandy clay, where clay content increasing gradually with depths ( J. R. Orimoloye et al, 2019).…”

Nijerya'nın güneybatısındaki yağmur ormanı bölgesindeki toprakların manyok, mısır ve çeltik üretimi için parametrik yöntem kullanılarak karakterizasyonu ve uygunluğunun değerlendirilmesi

“…The chemical characteristics of the pedons under investigation are shown in Tables 2a and 2b. (Orimoloye et. al., 2019) justified the classification of soils investigated as slightly acidic to neutral as observed from the pH (H 2 O) values that ranged from 5.2 to 6.8 and pH (1M KCl) values ranging from 4.1 to 6.1.…”