The 1999-2000 investigations were carried out on lessive soil developed from loess to study the effect of liming, PK and NPK fertilisation on red clover productivity over two years of its full utilisation, except for the year when it was oversown in cover crop, i.e. winter rye. In both years red clover produced similar quantities of total protein, whereas dry matter yields in the second year of utilisation were only 11% lower than in the first year. Out of all the fertilisation treatments, liming was the only one which enhanced the dry matter production and, unlike nitrogen fertilisation, increased the plant density per 1m² at the expense of their dry matter.

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