id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
afs-72788	Yli-Halla, Markku	Classification of acid sulphate soils of Finland according to Soil Taxonomy and the FAO/Unesco legend	1997	12	.pdf	application/pdf	6255	305	66	Key words: FAO/Unesco Soil Map of the World, pedogenesis, soil morphology, soil pH, soil survey, Soil Taxonomy, sulphur content ntroduction Acid sulphate soils (a.s. soils) are soils in which, “as a result of processes of soil formation, sul- phuric acid either will be produced, is being pro- duced or has been produced in amounts that have a lasting effect on main soil characteristics” (Pons 1973).A more quantitative criterion, need- ed for soil classification, has been presented, e.g. by van Mensvoort and Dent (1997): In a.s. soils, enough sulphuric acid is produced to bring soil pH below 4. Classification of acid sulphate soils of Finland according to Soil Taxonomy and the FAO/Unesco legend Markku Yli-Halla Agricultural Research Centre ofFinland, Institute ofResource Management, FIN-31600 Jokioinen, Finland, e-mail: markku.yli-halla@mtt.fi In order to place acid sulphate soils (a.s. soils) of Finland in an international context, five pedons from cultivated a.s. soils from Liminka, Ylistaro and Laitila on the western coast of Finland were analyzed and classified according to Soil Taxonomy and the revised legend of the FAO/Unesco Soil Map of the World.	cache/afs-72788.pdf	txt/afs-72788.txt