ISRICInternational Soil Reference and Information Centre
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La planification de l'AIPT a commence en 2000; douze-organisations--IUGS, IUGG, IGU, AGI, INQUA, AAPG, ILP, IUSS, ISRIC, GSL, TNO, et l'AIPG--ont pris part aux premiers efforts d'organisation de cette annee speciale pour les sciences de la terre et sont devenues des Fondateurs Associes.
Soils of the Eerika and Ahja sampling areas are Stagnic Albeluvisols, with loamy sand topsoil and loamy subsoil (FAO, ISRIC & ISSS 1998; Kolli 2002).
2009) based on their study of the ISRIC WISE Global database, which had [R.
1994; ISRIC 1995), following the methods of the ISRIC (1995); active carbonate (calcium carbonate extractable with ammonium oxalate) determined according to AFNOR (1982).
The model presented previously is estimated with data from two sources: the soil database of the ISRIC Soil Information System (ISIS), and expert assessments obtained by a questionnaire.
International Soil Reference and Information Centre; ISRIC (Online at: www.
Se determinaron densidad aparente por el metodo de la excavacion, pH en agua y capacidad de intercambio cationico por el metodo del acetato de amonio pH 7, de acuerdo con el manual del ISRIC (Van Reeuwijk, 1995).
The following soil determinations were made: pH, total organic carbon (TOC), total calcium carbonate (equivalent calcium carbonate), granulometric analysis, cationic exchangeable capacity (CEC), sum total of the exchangeable cations (S), and the exchangeable cations saturation percentage (% V), following the methods of the ISRIC (1995); textures are classified according to the International Society of Soil Science (ISSS); total nitrogen was analysed with the variant of Bouat and Crouzet (1965); and active limestone (calcium carbonate extractable with ammonium oxalate) was determined according to AFNOR (1982).