engleski

Organic matter status in soils of Eastern Croatia

The aim of this research is to collect data of soils organic matter percentage intended for intensive production and to evaluate spatial distribution. Organic matter has a huge impact on physical, chemical and microbiological soil characteristics and water storage capacity and plant nutrients. Organic matter has important place on soil fertility. Intensive vegetable production processes increases the mineralization of organic matter, and it is necessary to add organic fertilizer, to use appropriate crop rotation and regulation of soli reaction to maintain an optimal content of organic matter in soil. Information about the content of organic matter were colleced through the project "Soil fertility control on family farms" which started in 2003 on agricultural soils of the Eastern Croatia. Soil sampling sites are located by Global positioning system (GPS) and all date are placed in GIS date base. The percentage of organic matter in top soil layer (0-30 cm) was determined spectrometrically using bichromate method and results were classified according to the author-Gracanin. Through the project 16, 179 samples of soil were analyzed. The obtained results indicate that over 90% of monitored area, has a value of organic matter less than 3%.

agricultural soils, family farms, geographical information systems, global positioning systems, mineralization, rotations, soil biology, soil chemical properties, soil fertility, soil organic matter, soil physical properties, soil types, spatial distribution

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