In soil taken from field experiment after 72 years of fertilization with organic and organic-mineral fertilizers big difference in the content of total carbon, nitrogen, sulphur and phosphorus were found. The content of sulphur in inorganic compounds was the highest when (NH₄)₂SO₄ was applied and the lowest with PK fertilization and organic compounds extracted with 1 KC1 at 40°C from soil fertilized with slurry, the lowest from object with PK + (NH₄)₂SO₄. The highest content of total phosphorus and inorganic compounds was determined in soil fertilized with NPK + FYM and slurry.
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