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Reports and other soil maps that can be used for the Soil
Atlas:
	1.  Soils and Agro-Ecological Environments of Sri Lanka.
Information : Descriptions of Great Soil Groups of Soil Map of Sri
Lanka – 1972.
2. Soils of the Dry Zone, Intermediate Zone and Wet Zone.
Information : Morphology, Characteristics and classification of 122
soil series of Sri Lanka.
3. Fact sheets of soil series of Dry, Intermediate and Wet Zones
Information : Soil Physico-chemical properties of benchmark soil
profiles.
4. Soil K map of Sri Lanka (0-30 cm depth) by Vitharana (2017)
5. Soil Organic Carbon Stock Map of Sri Lanka (0-30 cm, 30-100 cm)
30 m resolution by Vitharana et al (in review process)
6. Detailed maps of P, K of paddy soils of Kurunegala, Pollonnaruwa
and Anuradhapura Districts (Rathnayake et al : only few maps
published)
Experience as editor:
Network:
Name of the presenter: Main areas of
expertise:
Country:
Dr. Udaya W.A. Vitharana
Sri Lanka Editor of Soil Science Society of Sri Lanka – 8 years
USA, Canada, Belgium, India, Thailand and China
Digital Soil Mapping, Pedometrics, Proximal Soil Sensing
Soil information available at National Level
Map	:	Soil	Map	of	Sri	Lanka	-	1972	
Scale	:	1:500,000	
Map	Units	:	Great	Soil	Groups	(Local)	
																				:	27	map	units	
ClassificaCon:	Soil	Taxonomy	–	Great	
group	
																							:	World	Soil	Resources	(WSR)	
Digital	data:	Available	
Soil	maps	of	Sri	Lanka	:	Dry	Zone	(RF	<	1750	mm),	Intermediate	Zone	(	RF	1750	–	2500	mm)	and	Wet	Zone	(RF	>2500	mm)	
Scale	:	1:250,000	to	1:500,000																																				Years:	1999	-	2010	
Map	Units	:	Soil	Series	–	ConsociaCons,	AssociaCons	and	Complexes	
ClassificaCon:	Soil	Taxonomy	–	Sub	group	level,								FAO	classificaCon	
Digital	data:	Partly	DigiCzed	informaCon	available	
Remarks	:	Individual	maps	can	be	integrated,	maps	of	soil	orders,	suborders,	greatgroups	can	be	devised		
Soil Priorities at the national level:
1. Combating Soil Erosion
Water and Wind erosion has caused decline of productivity in 50%
of agricultural lands.
Implementation of Soil Conservation Act (SCA)– 1956 in Sri Lanka
Declaration of Central highland of Sri Lanka as a high-sensitive area
under SCA.
Mapping of Erosion Hazard Zones (Jayasekara et al, 2017).
2. Fertility Decline
Net decrease in available nutrients and organic matter.
Productivity of 30% of Agricultural lands has significantly affected
due to declining soil fertility.
3. Dystrification
Lowering of soil pH by increasing acidic compounds
Upcountry (elevation >900 m) wet zone (RF >2500 mm).
4. Salinization
Affected the productivity of low country (elevation < 300 m) dry
zone (RF <1750 mm).
5. Soil Pollution
Agricultural areas : Contamination by trace metals such as Cd, Se,
Cu, As.
Presently, Base-line concentrations are being established.

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Soil Atlas of Asia: Sri Lanka

  • 1. Reports and other soil maps that can be used for the Soil Atlas: 1.  Soils and Agro-Ecological Environments of Sri Lanka. Information : Descriptions of Great Soil Groups of Soil Map of Sri Lanka – 1972. 2. Soils of the Dry Zone, Intermediate Zone and Wet Zone. Information : Morphology, Characteristics and classification of 122 soil series of Sri Lanka. 3. Fact sheets of soil series of Dry, Intermediate and Wet Zones Information : Soil Physico-chemical properties of benchmark soil profiles. 4. Soil K map of Sri Lanka (0-30 cm depth) by Vitharana (2017) 5. Soil Organic Carbon Stock Map of Sri Lanka (0-30 cm, 30-100 cm) 30 m resolution by Vitharana et al (in review process) 6. Detailed maps of P, K of paddy soils of Kurunegala, Pollonnaruwa and Anuradhapura Districts (Rathnayake et al : only few maps published) Experience as editor: Network: Name of the presenter: Main areas of expertise: Country: Dr. Udaya W.A. Vitharana Sri Lanka Editor of Soil Science Society of Sri Lanka – 8 years USA, Canada, Belgium, India, Thailand and China Digital Soil Mapping, Pedometrics, Proximal Soil Sensing Soil information available at National Level Map : Soil Map of Sri Lanka - 1972 Scale : 1:500,000 Map Units : Great Soil Groups (Local) : 27 map units ClassificaCon: Soil Taxonomy – Great group : World Soil Resources (WSR) Digital data: Available Soil maps of Sri Lanka : Dry Zone (RF < 1750 mm), Intermediate Zone ( RF 1750 – 2500 mm) and Wet Zone (RF >2500 mm) Scale : 1:250,000 to 1:500,000 Years: 1999 - 2010 Map Units : Soil Series – ConsociaCons, AssociaCons and Complexes ClassificaCon: Soil Taxonomy – Sub group level, FAO classificaCon Digital data: Partly DigiCzed informaCon available Remarks : Individual maps can be integrated, maps of soil orders, suborders, greatgroups can be devised Soil Priorities at the national level: 1. Combating Soil Erosion Water and Wind erosion has caused decline of productivity in 50% of agricultural lands. Implementation of Soil Conservation Act (SCA)– 1956 in Sri Lanka Declaration of Central highland of Sri Lanka as a high-sensitive area under SCA. Mapping of Erosion Hazard Zones (Jayasekara et al, 2017). 2. Fertility Decline Net decrease in available nutrients and organic matter. Productivity of 30% of Agricultural lands has significantly affected due to declining soil fertility. 3. Dystrification Lowering of soil pH by increasing acidic compounds Upcountry (elevation >900 m) wet zone (RF >2500 mm). 4. Salinization Affected the productivity of low country (elevation < 300 m) dry zone (RF <1750 mm). 5. Soil Pollution Agricultural areas : Contamination by trace metals such as Cd, Se, Cu, As. Presently, Base-line concentrations are being established.