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Topic: Degradation of soils

Related Topics

Pedology (soil study)

Soil

Soil remediation

Soil erosion

Soil structure

Humus

Soil profile

Soil life

Topsoil

Erosion

Succession

Deforestation

	Soils retrogression and degradation - Wikipedia, the free encyclopedia
		The soil represents the surface layer, of the earth's crust, resulting from the transformation of the bare rock, enriched by organic input.
		Lastly, deforestation, in particular, is responsible for degradation of forest soils.
		Soils particles in surface waters are also accompanied by agricultural inputs and by some pollutants of industrial, urban and road origin (such as heavy metals).
	en.wikipedia.org /wiki/Soils_retrogression_and_degradation (1320 words)

	Soils retrogression and degradation - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-11-06)
		Erosion is the main factor for soil degradation and is due to several mechanisms : water erosion, wind erosion, chemical degradation and physical degradation.
		Lastly, deforestation, in particular, is responsible for degradation of.
		biological diversity : soil degradation may involve the disappearance of the climax vegetation, the decrease in animal habitat, thus leading to a biodiversity loss and animal extinction...
	www.bucyrus.us /project/wikipedia/index.php/Soil_degradation (1359 words)

	Physical/Chemical Parameters:Phorate (Site not responding. Last check: 2007-11-06)
		Soils information _________________ A. Degradation and transformation ______________________________ A discussion of degradation of phorate in soils must include the transformation of the parent material to the metabolites.
		Degradation follows first-order kinetic reactions and the half-life of phorate varies from a few days to a week in sandy loam(12,13), 6d in silt loam under surface application and 30d in silt loam under incorporated application(11).
		The major reaction in sterile soils is the oxidation of phorate to the sulfoxide with the sulfone not appearing until microbes are introduced(3).
	pmep.cce.cornell.edu /facts-slides-self/facts/pchemparams/gen-pubre-phorate.html (581 words)

	Land Degradation Newsletter \| NRCS Soils
		In one of the widely used soil – crop – climate simulation models, an algorithm based on measured clay is used to estimate available water – totally oblivious to the role of mineral-chemical composition of soils.
		Of the major land degradation processes, vegetation degradation, salinisation of irrigated land, soil nutrient loss, and compaction and crusting are reversible, in the main.
		The product of the soil degradation exercise called GLASOD was a map of the entire world, whereas the land degradation evaluation was a country-by-country assessment of the world's dryland (arid, semiarid, and dry subhumid climatic zones).
	soils.usda.gov /use/worldsoils/landdeg/199808news.html (11503 words)

	International Conference on Land Degradation \| NRCS Soils
		It is in the context of the global economic and environmental impacts of land degradation and numerous functions of value to humans that the land degradation, desertification, and resilience concepts are relevant.
		Soil erosion by water is the principal cause of land degradation, and it is a major constraint to agricultural development in many countries.
		Soil and water conservation measures have to be adopted not only to reduce on-site soil, water and nutrient losses, but also to diminish negative downstream effects, such as flooding and the silting up of reservoirs.
	soils.usda.gov /use/worldsoils/landdeg/ld99.html (11366 words)

	Desertification (Site not responding. Last check: 2007-11-06)
		The Atacama desert is a very old arid region that possesses volcanic and saline soils; however, the agriculture carried out on its peripheries has been propitiated its haste advance in a period of barely ten years.
		The excess on agricultural exploitation of rustic lands generated this belt of soils’ degradation.
		The degradation of soils means a less food production for humans and their livestock.
	biocab.org /Desertification.html (1027 words)

	Soils Syllabus (Site not responding. Last check: 2007-11-06)
		COURSE OBJECTIVE: This course approaches soils using edaphic (soil/plant relationships) and pedologic (soil genesis, morphology, and classification) perspectives.
		The goal of the course is develop student understanding of soil properties by focusing on 1) external factors such as climate and parent material, and 2) internal processes that determine the physical, chemical, mineralogical, and biological characteristics of soils.
		Soils of the Pacific Northwest, human modification and degradation of soils, and the application of soils in the study of landforms and land use are also examined.
	web.pdx.edu /~hadley/SOILSYL99.html (236 words)

	Weeds
		Herbicides vary in their soil herbicidal activity because there are several factors which are going to influence this persistence, these include: amount applied; rate and method of breakdown; soil environment conditions - which will influence the previously mentioned factors as well.
		Soil conditions such as, moisture, pH, aeration, temperature, and the amount of organic matter affect the rate of breakdown under the microbial method.
		Increasing the soil’s organic matter content, through practices such as application of manure or plowing under cover crops, increases the soil’s ability to hold both water and dissolved herbicides in the zone of herbicidal update and degradation.
	gardeningfromthegroundup.us /weeds.htm (6319 words)

	Senegal TED Case Study (Site not responding. Last check: 2007-11-06)
		Deforestation, overgrazing, soil erosion, desertification, over-fishing, loss of floristic biodiversity and poaching of wildlife, in addition to rapid population growth, constitute Senegal's major environmental challenges, caused in part by the "rapid expansion of and continued dependence on peanut cultivation" (Golan, 93).
		Soils in that region are usually fragile, lack humus and exhibit low water retention capacity.
		Soils in that part of the country are low in calcium and phosphorus, and such shortages in organic content increase their likelihood to be acid.
	www.american.edu /TED/senegal-groundnut.htm (10519 words)

	ARS \| Publication request: Competitive Degradation Between Fumigants Chloropicrin and 1,3-Dichloropropene in Soils
		Generally, soil chemical and biological conditions influence the rate of fumigant degradation in soil.
		In this study, we determined the rate of degradation of 1,3-D and CP separately and as mixtures and evaluated possible competitive abiotic and biotic degradation in soils.
		Competitive degradation was also observed in soils amended with nucleophilic compounds such as ammonium thiosulfate.
	www.ars.usda.gov /research/publications/publications.htm?SEQ_NO_115=139724 (317 words)

	ARS \| Publication request: Analysis of Hydroxylated Atrazine Degradation Products in Soils
		Although many laboratory studies show that the HADPs are eoften the major degradation products of atrazine in soils, no generally accepted method for their analysis in soils has been developed.
		Using this new method in combination with existing methods for atrazine and its other degradation products we can, for the first time, present a more accurate picture of all the atrazine residues (i.e., atrazine and its stable degradation products) in soils 1-2 years after atrazine application.
		HADPs comprised an average of 91% of the total atrazine residues in three agricultural surface soils, with HA the major constituent present in all soils.
	www.ars.usda.gov /research/publications/publications.htm?SEQ_NO_115=109238 (532 words)

	TACTS-META \| Transatlantic Student Mobility (Site not responding. Last check: 2007-11-06)
		The project aims to minimize industrial pollution of soils through the study of the lindane degradation by microorganisms (fungus)
		The research work will be conducted by using lab techniques to investigate which microorganisms are better to the degradation of lindane (byproduct of insecticide production) in the polluted soils
		During the project execution, the student should have contact with other experiments being conducted at the lab.
	www.deb.uminho.pt /tacts-meta/usc_project02.htm (175 words)

	On Line Resource Available for Facts on the Degradation of Forests, Soils, Grazing Lands, Irrigated Lands and Fisheries (Site not responding. Last check: 2007-11-06)
		Bruce Sundquist reports that he has a huge web site of 3 MB (about 800 pages of text) that contains reviews of the global literature on the degradation of forests, soils, grazing lands, irrigated lands and fisheries (five separate reviews).
		Actually it is not so much a set of literature reviews as it is an organized compilation of key facts, figures, and summaries of arguments and analyses.
		For instance, in the Forest degradation review are some date comparing the capacity of forest soils to absorb rainfall relative to other land types.
	www.wvhighlands.org /VoiceOct01/Misc.htm (404 words)

	Encyclopedia article on Soils retrogression and degradation [EncycloZine] (Site not responding. Last check: 2007-11-06)
		Encyclopedia article on Soils retrogression and degradation [EncycloZine]
		Products related to Soils retrogression and degradation: books, DVD, electronics, garden, kitchen, magazines, music, photo, posters, software, tools, toys, VHS, videogames
		Visit Curious-Minds.co.UK for educational games and toys, and science kits.
	encyclozine.com /Soil_degradation (1363 words)

	Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations
		Energy Citations Database (ECD) Document #6078493 - Hydrocarbon degradation in soils and methods for soil biotreatment
		Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link.
		Hydrocarbon degradation in soils and methods for soil biotreatment
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=6078493 (101 words)

	Find in a Library: Organic compounds in soils : sorption, degradation, and persistence
		Find in a Library: Organic compounds in soils : sorption, degradation, and persistence
		Organic compounds in soils : sorption, degradation, and persistence
		WorldCat is provided by OCLC Online Computer Library Center, Inc. on behalf of its member libraries.
	www.worldcatlibraries.org /wcpa/ow/0c476e7dd285b48e.html (70 words)

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