Effect of Different Calcium Doses and Nitrogen Fertilizers on Yield and Yield Characteristic in Tomatoes

？anakkale is a very important part, especially for tomato production. This experiment was carried out with the aim of monitoring the yield and yield characteristics of the tomato seedling which were fertilized with different nitrogen (N) sources after growing with supplied the different doses of calcium (Ca) nutrients in growth media. In the first phase of the experiment; the growth media was treated four level of Ca (0, 100, 200 and 300 g Ca/m2) as calcium hydroxide [Ca(OH)2], and tomato seedlings were grown this medium. In the second phase of the experiment; tomato seedling was transplanted at the rate of one plant to each pot, and the transplanted tomato seedlings were grown by applying ammonium nitrate (AN), calcium nitrate (KN) and urea fertilizer by prorating doses of nitrogen as top fertilization. In this experiment, in which the seedlings were grown by applying Ca(OH)2 to the growth media, no blossom-end root was found in any of the tomatoes. However, when the yield parameters were evaluated, it was determined that the addition of Ca(OH)2 to growing medium for seedling resulted in a reduction in yield