Abstract
Abstract Soil analytical results arc presented based on long‐term field experiments conducted by the Hungarian Academy of Sciences, Research Institute of Soil Science and Agrochemistry. Owing to the long‐term fertilizer and/or manure applications, there are significant differences in the amounts of soluble organic nitrogen (N) fractions and also in the 0.01 M calcium chloride (CaCl2)‐soluble phosphorus (P) and potassium (K) contents. The P and K balances in the different treatments and the 0.01M CaCl2‐soluble P and K content of the soil highly correlate.
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