Abstract
The scope of the paper has been to determine the effect of soil fertilizers -90 kg N/ha, 75 kg N/ha, N90P75 kg/ha, farmyard manure, on the chemical and physical properties (resistance to penetration, humidity and total nitrogen) of the soil. The samples were obtained from a research institute - Romanian National Agricultural Research and Development Institute - Fundulea. From the total evaluated concentrations we can mention the total nitrogen content lowest values recorded in the case a <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> b <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> , respectively 1.12 mg/kg d. m. The higher humidity content in soil (14 %) has been recorded for soil case a <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> b <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sub> - WD2.
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