Effects of Reduced Nitrogen Fertilizer Applications with Organic Fertilization on Yield and Some Yield Components of Potato (Solanum tuberosum L.)

This research was carried out in isparta conditions in 2017 and 2018 in order to determine the effects of farm manure and rose pulp applications in addition to conventional and reduced nitrogen fertilization on some parameters affecting tuber yield in potatoes. farm manure and rose pulp were applied in two dosages as 2 t/da and 4 t/da, whereas nitrogen was applied as control, 8, and 16 kg n/da. organic fertilizer and nitrogen fertilization applications significantly increased the number of tubers per hill, tuber yield per hill, average tuber weight, total tuber yield, marketable tuber yield, and the ratio of marketable tuber. as a result of halving nitrogen fertilization and applying 4 t / ha of farm manure, tuber yield (3511 kg / ha) was higher than 16 kg / da nitrogen application (3303 kg / ha) without organic fertilization. in addition to 8 kg / da nitrogen fertilization, the tuber yield in both doses of farm manure and rose pulp at 4 t / da dose was close to the yield obtained in 16 kg / da nitrogen application. in the study, it was understood that by reducing inorganic nitrogen applications in terms of sustainable potato production, it is possible to increase the tuber yield per unit area with farm manure and rose pulp applications and to contribute to potato agriculture by economically evaluating rose pulp as agricultural waste.