Žemės ūkio mokslai / Agricultural Sciences
 ISSN 1392-0200 |
2007 m. Nr. 3 Change of soil pH in the territory of Lithuania: spatial
and temporal analysis
The paper offers an analysis of the processes of soil acidity neutralization and soil acidification, their interaction and practical consequences. The study object is acid Lithuanian soils.The study was carried out in Lithuania on national and local levels. Material collected in a fifty-year period of agrochemical studies of agricultural land and long-term investigation of soil liming has been used and summarized. The aim of the work was to verify the competence level of the scientific conception and the practical value of scientific recommendations using GIS statistical methods.
Systemic spatial and temporal analysis was the main method used in the study. Geoinformation methods were employed to establish the spatial gradation regularities of acid soil areas. The statistical analysis of the upper horizon pH and soil granulometric composition diversity involved the method of statistical grid (2 × 2 km = 4 km2). It was revealed that localization of acid soil areas as natural bodies in its essence is a regular natural phenomenon predetermined by soil genesis. The change of acid soil plots (decrease and increase) takes place in the same areas. Regular liming of acid soils according to scientific recommendations at recommended intensity and cycles, equally as omitting one cycle of liming, exert the greatest changes in the areas of the same acidity, i. e. in very acid and medium acid soils. Soil acidification in the whole territory of Lithuania, if no liming is applied, confirms the necessity of regular uninterrupted liming. The spatial gradation (decrease and increase) of acid soil areas corroborates the adequacy of the scientific conception and of practical scientific recommendations. Keywords: acid soils, soil pH, GIS statistic analysis |
Numeriai:
2012 - T.19 Nr.1 2011 - T.18 Nr.1, Nr.2, Nr.3, Nr.4 2010 - T.17 Nr.1-2, Nr.3-4 2009 - T.16 Nr.1-2, Nr.3-4 2008 - T.15 Nr.1, Nr.2, Nr.3, Nr.4 2007 - T.14 Nr.1, Nr.2, Nr.3, Nr.4, Nr.Priedas 2006 Nr.1, Nr.1.Priedas, Nr.2, Nr.3, Nr.4 2005 Nr.1, Nr.2, Nr.3, Nr.4 2004 Nr.1, Nr.2, Nr.3, Nr.4 2003 Nr.1, Nr.2, Nr.3, Nr.4 2002 Nr.1, Nr.2, Nr.3, Nr.4 2001 Nr.1, Nr.2, Nr.3, Nr.4 |