The effects of different nitrogen doses on yield and agricultural properties in early potato farming under the ？ukurova

Aims: This study was conducted to determine the effects of different nitrogen doses on the yield and agricultural properties in early potato farming grown in ？ukurova (Sayge？it, ？mamo？lu, Adana) in 2016. Methods and Results: Seven different nitrogen doses (0, 5, 10, 15, 20, 25, 30 kg N da-1) were examined in the experimental design of random blocks with three replications. The parameters investigated were number of main stems, plant height, number of tubers per plant, tuber yield per plant, single tuber weight and yield. Conclusions: The results of the research showed that yield, number of tubers per plant, and the tuber yield per plant were significantly affected by nitrogen doses which had no significant effects on number of main stems and single tuber weight. The maximum yield (5146 kg da-1), number of tubers per plant (7.60) and tuber yield per plant (900.67 g) were obtained from the application of 20 kg N da-1. Significance and Impact of the Study: In the study, it was determined that the application of 5-20 kg N da-1 significantly affected the yield of the tubers, whereas in applications exceeding 20 kg N da-1, there was a decrease in tuber yield. 20 kg N da-1 was found to be suitable for optimum benefit from sources