SUMMARY

This study has been carried out for assessing the nutrient problems of greenhouse cucumbers which is increasingly replacing the cut-flower culture in greenhouses in the East Marmara Region. In 1994-95 soil, leaf, fruit and water samples were taken from 26 greenhouses and some information about the yield, fertilising and green-house conditions were obtained.

The textures of the soils was generally clay-loamy and there were problems of salinity in 23-30 %, high soil pH in 54-69 %, low organic matter content in 69-77 %, insufficient P and K content in 31-15 % and low soil B content in 23-15 % of the units-surveyed. N, P and K contents of the leaves were at sufficient level in all the units, but, irregularly with the years, there were nutrition disorders with Fe in 54-38 %, Mn in 54-69 %, Zn in 23-38 % of the units. In 1994, there was no problem with Mg nutrition but, 46 % of the units were at insufficient level in 1995. B content of the leaves were at insufficient level in 85-100 % of the units, Ca content of the leaves were at insufficient level in all the units studied.