Soil Degradation

Soil Degradation

 

a process that results in the partial loss by soil of previously accumulated organic matter, exchangeable alkaline-earth cations, and the clayey fraction. This term previously designated the podzolization of chernozems under the influence of forest vegetation. Thus the term podzolized chernozems is now used in soil classifications instead of the former term degraded chernozems. In the initial stage, soil degradation occurs in the lower part of the humus horizon and in the illuvial carbonate horizon (under the humus horizon). Degradation in the lower and sometimes middle sections of the humus horizon results in so-called siliceous sprinklings, consisting of quartz and feldspar grains, weak base unsaturation, some accumulation of silica, a decrease in sesquioxides (compared to the parent rock), and other signs of weak podzolization. These phenomena, how-ever, do not bring about a marked decrease in soil fertility. Degraded, or podzolized, chernozems are as fertile as typical chernozems.

S. A. SHUVALOV

References in periodicals archive ?
Food waste impacts natural resources in terms of land and soil degradation.
The Food and Agriculture Organization (FAO) said 12 million hectares of agricultural soils are lost globally through soil degradation every year.
The level of soil degradation globally is 'alarming' and has the potential to threaten food security and send many people into poverty.
At the same time, the level of soil degradation globally is "alarming" and has the potential to threaten food security and send many people into poverty.
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PML-N's MNA Khalida Mansoor said that deterioration of the environment through paced depletion of resources, particularly deforestation, insane ground water use for irrigation purposes, increased air pollution soil degradation because of excessive use of chemical fertilisers and lack of proper solid waste management in Bahawalpur district has led to the dismal situation of environment and various public health issues/diseases.
The importance of crAft is demonstrated by the devastating effects its absence can have: The modern tendency to favor mechanization over crAft, Langlands posits, has resulted in flooding, soil degradation and global warming.
In the session of "We Are the Future", she highlighted the most common Arab environmental issues such as desertification, water and air pollution, soil degradation, biodiversity loss, overfishing, overgrazing, soil and water salinity.
Qatar is aware of the risks posed by climate change, ozone depletion, drought and desertification, as well as similar and interrelated environmental problems such as scarcity of water resources, industrial pollution, soil degradation and pollution of the marine environment, HE the Minister of Municipality and Environment Mohamed bin Abdullah al-Rumaihi has said.
Modern farming practices have caused soil degradation to become a chief concern among the agricultural community.
Presently, organic farming is the only best solution to avoid soil degradation.
He said Pakistani farmers were facing various challenges including soil degradation, changing prices of inputs, lack of suitable agricultural machinery, imbalance use of fertilizer and burning of crop residues.