Physicochemical properties as related to mineralogical composition of floodplain soils in humid tropical environment and the pedological significance

Nine Nun River floodplain soils in Bayelsa State were evaluated using Land Capability Classification (LCC), Land Capability Index (LCI) and Fertility Capability Classification (FCC) systems. The LCC grouped most soil mapping units (SMUs) into class II except NDU3. Odi (ODI1), Koroama (KRM1) and Niger Delta University (NDU1) were grouped in IInf0; ODI2, KRM2 and NDU2 in IIwnf0; ODI3 and KRM3 in IIwnf1 and NDU3 in Vwnf3, respectively. Indicating suitability for wide range of arable crops. The LCI grouped ODI1, KRM1 and NDU1 in class II while ODI2, ODI3, KRM2, KRM3, NDU2 and NDU3, in class III for annual crops. For perennial crops, KRM1 and NDU1 were grouped in class II, ODI1, KRM2 and NDU2 in class III while ODI2, ODI3, KRM3 and NDU3, in class IV, respectively. The FCC grouped ODI1 in La- and ODI3 into Lga-e. On the other hand, KRM1 was grouped in La-e while KRM2, KRM3 and NDU3 in Lga-ek. The identified limiting fertility constraints were wetness, flooding, low exchangeable K+, Ca2+ and Mg2+ concentration, soil acidity as promoted by Al3+ toxicity, texture and drainage. LCI and FCC identified texture as a major constraint with LCI placing emphasis on soil colour while FCC identified K+ deficiency as a limitation. Wetness, flooding, low nutrient capital of exchangeable K+, Ca2+ and Mg2+, soil acidity and Al3+ toxicity, texture and drainage were key to land evaluation in the study area. Flood control, improved drainage, liming and adequate fertilization practices including organic matter conservation should be adopted for improved land management.

Section: Introductionmentioning

confidence: 99%

Capability groupings of some nun river floodplain soils of Bayelsa State, Southern Nigeria

Dickson¹,

Tate²,

Ogboin³

2022

“…The values were rated very low on the scale described by Holland et al (1989). The values aligned with those of organic carbon mainly because much of soil nitrogen is present in organic form (Udo et al, 2009;Ukabiala et al, 2021). Available P content of the soils ranged from 2.06 to 3.60 g kg −1 in the surface soils and from 0.99 to 3.08 g kg −1 in the subsurface soils.…”

Section: Chemical Properties Of the Soilsmentioning

confidence: 67%

Characterization and classification of three major soils at the college of agriculture, Jalingo, Taraba State, Nigeria

Kefas,

Ofem,

Hammanjoda

et al. 2024

Adequate information on land resources have been identified as a pre-requisite for sustainable land management. The present study was carried out to characterize and classify the soils of College of Agriculture, Jalingo, Taraba State, and to suggest soil management recommendations for optimum crop yield. Digital elevation model (DEM) of the study location was obtained and the slope map of the area generated using ArcGIS (ESRI, US) software. This was used to identify the major soils (MU1, MU2 and MU3). Two soil profile pits were sited in each of MU1 and MU2, and one pit was sited in MU3. The soils were described and sampled for laboratory analyses. The results revealed the dominance of transitional horizons namely; AB, BC and CB which also showed raised proportions of clay. The soils were shallow to bedrock and dominated by brown, dark yellowish brown and gray colours (moist) in the surface soils and reddish to yellowish brown in the subsurface horizons. Sand size fraction dominated the particle size distribution and resulted in sandy loam and sandy clay loam textural classes. All the soils had bulk density < 1.50 g cm−3. Soil pH was slightly acid to neutral and values in water were higher than those in CaCl2 in all horizons. Organic carbon, total N, available P and exchangeable bases were low in most of the soils, while base saturation was high. Two of the soils (MU1 and MU2) were classified as Alfisols while MU3 was classified as an Entisol according to the USDA system. According to the World Reference Base for Soil Resources system of classification, MU1 and MU2 were classified as Lixisols and MU3 as a Gleysol. The incorporation of organic manure, cropping across slopes, and practicing afforestation are recommended for soil nutrient management.

“…The Low ECEC is attributed to the high sand content of the soils (Ukabiala et al, 2021), dominated by the fine sand fraction (Obalum et al, 2012), and this led to the leaching of exchangeable bases, OC and TN. The low ECEC could also be attributed to the extensive and continuous cultivation of the soils (Kolo et al, 2022).…”

Section: Resultsmentioning

confidence: 99%

Fertility capability classification of selected soils on the basement complex of north-eastern Nigeria

Kefas¹,

Maniyunda²,

Shobayo³

et al. 2023

A clear understanding of soil characteristics and their appropriate classification are essential for efficient land use and increased productivity. The present study was carried out to obtain the fertility capability classification (FCC) of the soils overlying the basement complex in a toposequence in north eastern Nigeria and to serve as baseline data for soil management. Soils on four topographic positions identified on porphyritic granite (PG), pegmatite (PT) and granite-gneiss (GG) of the basement complex in Taraba State of Nigeria were assessed. Twelve pedons were studied in all, four along the toposequence on PG, PT, and GG. At the type and substrata type, sandy and loamy group dominated. Ustic soil moisture regime, exchange acidity (fixing available phosphorus) and low organic carbon limited the entire soils across the basement complexes restricting rainfed crop production to one season per annum except with irrigation practice. Poor drainage was a limitation across the soils on pegmatite. The FCC rated PG and GG soils as SLdeam (sand over loam and limited by moisture, effective cation exchange capacity, aluminium toxicity and organic carbon) and Ldam (loam type and substrata characteristics limited by moisture, aluminium toxicity and organic carbon), and PT and PT soils as Sdamg (sandy type and substrata type restricted by moisture, aluminium toxicity, organic carbon, drainage). Ridge construction, organic and mineral fertilizer applications are essential management practices required for sustainable use of these soils.