Zmiany niektórych wskaźników żyzności gleby w wyniku stosowania obornika i obornika z dodatkiem kory sosnowej

In 1994 - 1996, on a light soil of a good rye complex, the influence of manure applied alone and manure used with pine-bark at three levels of nitrogen fertilization on some soil fertility indicators was investigated. Three years after the application of the organic fertilizers used, manure along wiht pine-bark compared wiht the manure alone treatment slightly decreased soil pH and its contents of assimilable phosphorus and potassium, increased hydrolytic acidity and the content of exchangeable aluminium and has no effect on the content of magnesium.