Assessing the changes of soil humus content in Zala county
Abstract
In previous decades agricultural lands have been deteriorating in terms of soil organic matter (humus) decline as a consequence of non-sustainable agricultural practices. The assessment of humus content of arable lands in Zala County is based on measured humus content (weight%) data of the Hungarian Soil Information and Monitoring System (TIM) collected from 1992 to 2010. As a result of soil sampling methodology change in 2000, 3–3 measured data of 39 sampling points were available by sampling method. Taking into consideration the small number of measurements and the different soil characteristics, changes were analysed within soil subtypes. Categorization of humus content was based on the classification system of The Handbook of the Large-Scale Genetic Soil Mapping (Jassó et al., 1989). We detected positive humus content changes during the sampling period I. (1992–1998) and declining humus content during the sampling period II. (2000–2010).
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