Effects of different irrigation intervals on the yield and quality of sprinkler-irrigated peanut crops in Tokat/Erbaa province

This study was performed in 2017 at the District of Erbaa, in the Province of Tokat, to determine the effects of different irrigation intervals on the yield and quality of sprinkler-irrigated peanut crops. The research was conducted in line with the experimental design of randomized blocks in three repeats. During the experiment, 4 different irrigation intervals (were applied, S0: Non-irrigated, S1: 5-day interval, S2: 10-day interval, and S3:15-day). The reference evapotranspiration (ETo) was calculated using the FAO Penman-Monteith method and found to be 678.96 mms. The crop evapotranspiration (ETc) values varied between 160.34 and 565.68 mms. As a result of the experiment, it is seen that the yield values varied as follows: amount of peanut grains from 23.66 kgs to 274.61, number of pods per crop from 7.3 to 31.2 pcs, pod yield per decare from 70 to 433.33 pcs, weight of 100 grains from 72.19 to 97.49 grs, oil rate from 44.78% to 58.46%, and protein rate from 12.86% to 20.78%. It was observed that the internal diameter of groundnut in irrigation parcels generally ranged between 11 and 9 mm, whereas the internal diameter of groundnut in non-irrigation parcels was less than or equal to 5.5 mm. As a result, the yield and oil ratio values of the subject with a 10-day irrigation interval were higher than the other irrigation intervals, although it was not statistically different except for the non-irrigation subject.