|Authors: ||M. Raviv, R. Reuveni, Sh. Medina, Y. Shamir, O. Duvdevani, Y. Shor, R. Schayer|
Rose plants were grown in used and new tuff with or without chemical or solar treatments.
Yields were relatively low in used, untreated tuff as compared to both treated or new tuff.
Some allelopathic activity was found in extracts of used tuff but as this activity was similar for treated and untreated tuff, it cannot explain the difference in yields.
Minor phytopathogenic fungi (Fusarium and Pythium spp.) were abundant in used tuff and rare in both treated or new tuff.
Their later appearance on the rose roots followed the same pattern and is apparently associated with the plant's productivity.
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