The Change of Leached Chernozem Fertility in Voronezh Region after Long-Term Application of Fertilizers in Vegetable Crop Rotation
It was shown that prolonged (28 years) cultivation of leached chernozem in vegetable crop rotation with organic fertilization system (40 t/ha of manure annually) increased the soil humus level (+8.6% RH), minimized soil acidification, enriched soil with available phosphates. Organic-mineral fertilization system, in contrast to the mineral one, contributed to maintaining the soil humus close to the initial level (-0.3% RH), and improved phosphate and potassium status. Mineral fertilization system was equal to the organic fertilization in enriching soil with phosphorus and potassium, but significantly acidified soil and was not able to maintain the humus level.