DETERMINATION OF NUTRIENT CONTENTS OF PISTACIA VERA L. AND ASSESSMENT OF THE MOST SUITABLE LEAF COLLECTION TIME
According to soil and leaf analysis results, pistachios are grown in reddish-brown soil. Approximately the one third of the soil is shallow and have only an A- horizon layer. Most of the investigated soils are loamy texture, of low salinity and have a pH medium status to extreme alkalinity. Lime content is high to very at high. The organic matter and available phosphorus contents of these soils are low and potassium and magnesium content generally sufficient.
Limiting values of nutritional plant element for pistachio which can be considered as standard were determined. Using orchards exhibiting stable growth and yields. It was seen that there was deficiency in phosphorus and zinc. However according to the limit values given for pistachio there are no major problem with zinc. Deficiency while there were nitrogen and potassium deficiencies in some orchards. The iron value was at the lowest limit. There was no problem with copper, calcium and boron. According to the leaf samples collected at different times, the best time to collect leaf samples is at the end of July (first sign of the maturity).