An understanding of the spatial and temporal variability of effective elements such as soil andplant properties is crucial in order to decrease the uncertainty of field management. This study focused on theimpact of nitrogen fertigation through sprinklers on the spatial and temporal variability of soil and cropproperties. The relationships between fertigation distribution pattern and crop performance was studied todefine field management strategy based on soil and crop spatial variability. The crop was sugar beet grownin the Fesaran village, east of Isfahan city, Iran. To describe the variability of soil and plant status, responseto the N fertilizer application by sprinklers was studied by analyzing soil characteristics including N, P, K,CEC, EC and pH as well as crop properties that included leaf N content, tuber sugar content and yield. Therewas positive correlation of N in the soil to leaf N content (r=0.24) but negative correlation to sugar content(r=-0.27). Northeastern part of the field had high ranges of leaf N content, but very low to medium ranges oftuber sugar content. Results of N fertigation by sprinklers show the low variability of N leaf content(CV=10.3%) and tuber sugar content (CV=6.4%) through and across the study area. N fertigation throughsprinklers caused low variability of soil N as well as leaf N content, hence low variability in tuber sugarcontent and yield. With N fertigation, higher sugar content of tubers was achieved compared to previousrecords of this field and the average yield and tuber sugar content for the Isfahan area. Based on Pearson testresults, it can be concluded that sugar beet only respond to N fertilizer and there was no significant effect ofP and K fertilizers on selected crop properties. Urea fertigation has significant impact on leaf N contentdirectly and tuber sugar content indirectly. It indicates that sugar beet performance depends on factors otherthan P and K.