The present paper analyses forest soils from Satu Mare County based on their main chemical properties and by using data from forest management plans. The study follows the distribution of the main soil types, their development conditions as well as their evolution during three decades, starting with the year 1990. The research methodology is specific to studying forest ecosystem within projects specialized in forest fund characterization, whose result is represented by forest management plans. As such, analysis were realized for pH, humus content, exchange base capacity(Sb), hydrogen exchange capacity (Sh), total cationic exchange capacity (T), base saturation degree(V) and total nitrogen. Luvisol is the most widespread forest soil in this area while the lowest pH values in the first horizon were found for dystric cambisol (4.36), while the highest ones were for eutric cambisol (4.96); pH values increase in the second horizon. The lowest values for the basis degree saturation were also found for dystric cambisol (oligomesobasic soils), while the highest values were for eutric cambisol (eubasic soils). The humus content is high for luvisol and dystric cambysol, while stagnosol, preluvisol and eutric cambisol are moderately humiferous. Nitrogen supply is very good for dystric cambisol, good for eutric cambisol, preluvisol and luvisol and weak for stagnosols. Dystric cambisol has a very large total cationic exchange capacity, while all the other soil types have a large exchange capacity. As such, we can conclude that the values of the main

eutric cambisol, luvisol, humus, nitrogen, base saturation degree, total cationic exchange capacity

sciences soil

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