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Frontiers of Agricultural Science and Engineering

ISSN 2095-7505

ISSN 2095-977X(Online)

CN 10-1204/S

Postal Subscription Code 80-906

Front. Agr. Sci. Eng.    2024, Vol. 11 Issue (2) : 271-281    https://doi.org/10.15302/J-FASE-2024567
Global black soil distribution
Yuxin TONG(), Marcos E. ANGELINI, Yusuf YIGINI, Isabel LUOTTO
Global Soil Partnership, Land and Water Division, Food and Agriculture Organization of the United Nations, Rome 00153, Italy
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Abstract

● Global black soil distribution map developed by using country-driven approach.

● Black soils are key to global food security and climate change mitigation and adaptation.

● Black soils form under various pedoenvironments at global level.

● Black soils predominantly occur in Eastern Europe, Central and Eastern Asia, and the northern and southern extremities of the Americas.

● Black soils hold a substantial global soil organic carbon stock, amounting to about 56 Gt.

Black soils, characterized by their thick, dark horizons enriched with organic matter, epitomize highly fertile soils. However, their fertility precipitates intense land use, engendering challenges such as soil erosion, nutrient depletion, pollution, compaction, salinization, and acidification. Notably, these soils are significant contributors to global greenhouse gas emissions, primarily due to substantial losses in soil organic carbon. Despite these challenges, black soils are pivotal for global food production. This paper delineates the implementation of digital soil mapping for the global cartography of black soils and human interference on these soils. Predominantly distributed in Eastern Europe, Central and Eastern Asia, and North and South America, black soils cover an approximate area of 725 Mha, with the Russian Federation, Kazakhstan, and China collectively have over half of this area. Agriculturally, these soils underpin significant proportions of global crop yields, producing 66% of sunflower, 30% of wheat, and 26% of potato outputs. The organic carbon content in the upper 30 cm of these soils is estimated at 56 Gt. Sustainable management of black soils is imperative for ensuring food security and addressing climate change on a global scale.

Keywords Black soils      distribution map      food security      soil organic carbon     
Corresponding Author(s): Yuxin TONG   
Online First Date: 22 May 2024    Issue Date: 13 June 2024
 Cite this article:   
Yuxin TONG,Marcos E. ANGELINI,Yusuf YIGINI, et al. Global black soil distribution[J]. Front. Agr. Sci. Eng. , 2024, 11(2): 271-281.
 URL:  
https://academic.hep.com.cn/fase/EN/10.15302/J-FASE-2024567
https://academic.hep.com.cn/fase/EN/Y2024/V11/I2/271
Fig.1  Workflow for mapping black soils.
Fig.2  Steps to produce global map from national maps.
Country Black soil area (Mha) Country area (Mha) Black soil proportion (%)
Russian Federation 327.0 1700 19.2
Kazakhstan 108.0 284 38.0
China 50.0 935 5.4
Argentina 39.7 278 14.3
Mongolia 38.6 157 24.6
Ukraine 34.2 60 57.0
USA 31.2 950 3.3
Colombia 24.5 114 21.5
Canada 13.0 998 1.3
Mexico 11.9 196 6.1
Tab.1  Top 10 countries with the largest areas of black soils
Black soil World Percentage
Area (Mha) 725 12,995 5.58
Population (million people) 223 7788 2.86
Cropland area (Mha) 227 1308 17.4
Forest area (million km2) 212 4496 4.72
Grassland area (million km2) 267 3129 8.52
Tab.2  Areas and population in black soils zones
Fig.3  Global contribution of crop yields originating from black soils was assessed by overlaying the GBSmap on the “Global Spatially-Disaggregated Crop Production Statistics Data for 2010 Version 2.0” from the International Food Policy Research Institute, 2019. The study showed results for crop proportions below 5% and for combined categories of crops from the evaluation.
BS Global total BS%
Total SOC stock (Gt C)1 56.0 677 8.3
Cropland SOC stock (Gt C)2 18.9 62.8 30.1
Potential SOC sequestration (Gt·yr?1 C)3 0.029 0.29 10.0
Tab.3  Total and cropland soil organic carbon (SOC) stocks and potential carbon sequestration rates associated with black soils (BS)
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