5 possible solutions to soil degradation . The primary causes are deforestation, overexploitation for fuelwood, overgrazing, agricultural activities and industrialization. The status of soil health can be determined in two different ways. It is imperative that the global society is not shortsighted by focusing solely on the near-immediate benefits of soils, such as food supply. Reading Time: 2 minutes. Soil degradation through pollution and acidification can be local or diffuse. Land degradation—the deterioration or loss of the productive capacity of the soils for present and future—is a global challenge that affects everyone through food insecurity, higher food prices, climate change, environmental hazards, and the loss of biodiversity and ecosystem services. Share this post. Global soil degradation Overview of the state of global soil degradation in the world. But few things matter more to humans because we rely on the soil to produce food. The status of soil degradation was mapped within loosely defined physiographic units (polygons), based on expert judgement. It takes thousands of years for soils to form, meaning protection is needed urgently, say scientists, Last modified on Wed 16 Dec 2020 03.46 EST. A quarter of all the animal species on Earth live beneath our feet and provide the nutrients for all food. Using this item and referring to it is encouraged, and please use Avoiding soil degradation is crucial to our well-being. But there also are major gaps in knowledge, according to the UN Food and Agriculture Organization’s (FAO) report, which is the first on the global state of biodiversity in soils. The economic and agronomic impacts of accelerated erosion are widely recognized Pimentel et al., 1995, Lal, 1998, den Biggelaar et al., 2001. Soil erosion is a major global soil degradation threat to land, freshwater, and oceans. Of the world’s total land area of 13.5 billion hectares, only 3.03 billion hectares (22 per cent) is actually cultivable and about 2 billion hectares is degraded. Global perspective on soil erosion Our baseline model predicts an annual average potential soil erosion amount of 35 Pg yr −1 for 2001, with an area-specific soil erosion average of 2.8 Mg ha −1 yr −1. It has led to increased pollution and sedimentation in streams and rivers, clogging these waterways and causing declines in … Soil degradation is defined as a process which lowers the current and/or future capacity of the soils to produce goods or services. Les données citées sur l'importance relative, à l'échelle mondiale, des différentes formes de dégradation proviennent du programme GLASOD (GLobal Assessment of human induced SOil Degradation ; évaluation mondiale de la dégradation des sols sous l'effet des activités humaines) qui date de 1991. This perception has exacerbated the conflicting agricultural demands on natural capital, as have other exploitative commercial enterprises. About 3.2 billion people worldwide are suffering from degraded soils, said IPBES chairman Prof Sir Bob Watson. Photo: Geralyn Wichers . Words by Lucy Purdy February 26, 2018. As a natural process, soil degradation can be enhanced or dampened by a variety of human activities such as inappropriate agricultural management, overgrazing, deforestation, etc. Globally, about 24% of the global land area has been affected by degradation and over 1.5 billion people live on degraded lands. In 2014 the FAO’s Maria-Helena Semedo said that if the rate of degradation continued then all of the world’s topsoil could be gone within 60 years, but more recent research suggests a much lower rate of loss. 24% of the global land area with degrading areas mainly in Africa south of the equator, South-East Asia and south China, north-central Australia, the Pampas and swaths of the Siberian and north American taiga; 1.5 billion people live in these areas. Soil erosion is one of the main factors causing land degradation. type of wind erosion (on 455 M ha), while terrain deformation (82 M ha) and over. Soil degradation a costly global issue About a third of the world’s soil is degraded, which has economic and food security implications. These impacts include compaction, loss of soil structure, nutrient degradation, and soil salinity. The loss of arable land has been caused by a number of factors, many or most of which are tied to human development. The status of soil degradation was mapped by defining physiographic units, themselves based on expert judgment, in which type, degree, extent, rate … Gaseous emissions from terrestrial ecosystems are exacerbated by soil degradation, of which accelerated soil erosion is the most predominant and widespread form. World soil day – Agroforestry can help to reverse the trend of global soil degradation. small vs largeholder farms). We used 33,241 soil data points to model recent (1980–1999) global distributions of Selenium (Se), an essential trace element that is required for humans. Globally, about 24% of the global land area has been affected by degradation and over 1.5 billion people live on degraded lands. While … In turn, land use change is driving land degradation: soil erosion, nutrient depletion, salinity, water scarcity, pollution, disruption of biological cycles, and loss of biodiversity. Soil degradation, defined as lowering and losing of soil functions, is becoming more and more serious worldwide in recent decades, and poses a threat to agricultural production and terrestrial ecosystem. These are very real and at times severe issues. fr En outre, d’après l’évaluation … Global Soil Week: A Platform to Meet and Forge Alliances for Change. June 19, 2017 — Soil compaction is a global threat to soil ecosystem services, causing tremendous costs to society. The areal extent of global degraded areas varies depending on the definitions. The effects of soil erosion go beyond the loss of fertile land. From collection: IAASTD - International assessment of agricultural science and technology for development, Cartographer: moisture holding capacities and altering soil profiles. Scientists describe soils as like the skin of the living world, vital but thin and fragile, and easily damaged by intensive farming, forest destruction, and pollution. Soil erosion and the global C cycle. 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