Nutritional overview of vineyards in the village of Stimanga, Korinthia, with respect to K, Mg, Ca, Fe, Zn, Mn and Cu.
This research was conducted in order to better understand the relation between levels of assimilable K, Mg, Ca, Fe, Mn, and Cu in soils of the region and levels of the same nutrients in vineyard leaves.
The results of the present study could be summarized as follows:
It is not possible to draw firm conclusions about the etiology of the “drying spine” anomaly in the vineyards studied. Excessive levels of potassium are considered by many researchers to be the cause of the anomaly, but that’s not an observation of ours. On the contrary, the K/Mg and K/Mg+Ca ratios were lower than normal, which implies a potassium deficiency in the vineyards.
Potassium levels in the soil were at low levels as well as zinc levels. The latter, in cases where it had not been applied through foliar fertilization, is also found at low levels in the leaves of the vine.
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