Seasonal changes of macro and micro elements in tea soils

In this project, 60 soil samples being on the point of 30 soil samples in spring and 30 soil samples in autumn were taken from the locality of Fındıklı, Pazar and Sabuncular where cultivation of tea has been made in Rize. The determinations of pH, organic matter, macro and micro elements were made in this soil samples taken and seasonal changes were investigated. The assays are Determination of pH, Determination of Organic Matter by Smith-Weldon Method, Determination of Nitrogen by Mikrokjeldahl Method, Determination of Phosphorus Soluble in Acid, Determination of Potassium by Flamefotometr Method, Determination of Calcium by EDTA Titration, Determination of Calcium + Magnesium by EDTA Titration, Determination of Extractable Iron, Manganese, Zinc and Copper by DTPA. These assays were applied to all soil samples taken in both seasons and the results were studied by doing 360 analyses. In the results, it was detected that the values of pH and macro elements are high but the values of micro elements are low in all three regions in spring. However, it was detected that the values of pH and macro elements are low but the values of micro elements are generally high in autumn. It was found that Organic matter levels are above the normal values in both seasons.