Human-altered soils – Signatures of Anthrosols and their potential for arable lands

• Published in: Soil Ecology Letters 2023-09, Vol.5 (3), p.220164, Article 220164
• Main Authors: Asare, Michael O., Apoh, Wazi, Afriyie, Jerry Owusu, Száková, Jiřina, Asrade, Dinkayehu Alamnie
• Format: Article
• Language: English
• Subjects: Accumulation; Agricultural land; Anthropogenic factors; Anthrosols; arable field; Arable land; Bioavailability; Calcium; Cation exchange; Cation exchanging; Copper; Crop production; Earth and Environmental Science; Ecology; Electrical resistivity; Environment; Environmental conditions; Fertility; Human influences; Manganese; Nutrient availability; Nutrient retention; Nutrients; Organic matter; Organic soils; Physical properties; Physicochemical properties; releasability; Research Article; settlement activities; Signatures; Soil fertility; Soil multifunctionality; Soil nutrients; Soil Science & Conservation; Soil settlement; Soils; Zinc
• ISSN: 2662-2289; 2662-2297
• DOI: 10.1007/s42832-022-0164-0

● Past human activities result in the formation of Anthrosols and the accumulation of nutrients. ● Enrichment in physicochemical properties relates to the intensity of settlement activities. ● The level of releasability contributes to the extended retention of nutrients in soils. ● Past settlement sites represent nutrient-rich Anthrosols suitable for arable fields. The fertility of human-altered soils, Anthrosols, developed from past settlement activities for crop production is scarcely studied. The study evaluated the fertility of Anthrosols developed from the 15th to mid-20th century AD settlement in Old Buipe, Savanna region, Ghana, to determine whether abandoned localities are suitable for arable fields. Human activities enhanced the physical attributes of the Anthrosols: brown to dark brown intergrain fine soil, 15%−35% organic matter, 15%−30% potsherd, and 5%−15% charred materials. The Anthrosols were slightly acidic to neutral reactions ( \textcolor [ R G B ] 32 , 147 , 147 p H [ H 2 O ] 5.67−6.83, \textcolor [ R G B ] 32 , 147 , 147 p H [ C a C l 2 ] 5.83−6.95), high cation exchange capacity (CEC; 18.77−45.31me/100 g), electric conductivity (EC = 0.28−0.36 dS m −1), accumulation, and distribution of organic C, total N, P, Mn, Cu, Zn, K, and Fe, and available P, K, Ca, Mg, S, Mn, Fe, Cu, and Zn. Plant-available nutrients were comparatively higher than concentrations in non-anthropogenic soils. The level of releasability (bioavailable fractions of total concentrations) of P, K, Ca, Mn, Fe, Cu, and Zn partly compensates for low plant-available portions. Enrichment of chemical and physical properties of Anthrosols make them fertile for arable fields. The signatures of settlement activities are strong and can remain in soils for a long time, even under harsh environmental conditions.