Published in Scientific Papers. Series A. Agronomy, Vol. LXVII, Issue 1
Written by Adriana Iulia GRAFU, Ion CREANGA, Mihaela LUNGU
In Romania 49.5% of the total soil surface have pH below 5.8 which represents a risk for aluminum toxicity and plants growth. Research carried out in the High Pitești Plain aimed to study exchangeable aluminum presence in cultivated soils in order to issue recommendations for acid soils liming. Soil samples collected from the first soil layer, down to 25 cm depth, were analysed in the laboratory and the reaction, humus and available phosphorus and potassium contents, and cation exchange properties were determined. Out of 120 analysed samples 38 showed contents below the method’s detection limit. Relationships were drawn for the rest 82 of them between humus and available phosphorus and potassium on one hand and soil reaction and aluminum contents on the other to assess aluminum variability and its possible toxicity for plants. Low, very low, and extremely low aluminum quantities were found which means there is no immediate risk of soil acidification in the studied area from this point of view. Researches must be carried on though in other Romania agricultural land on acid soils.
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