Abstract:

This study was conducted in Erzurum in 2000-2001 with the aim of determining the impact of nitrogen fertilizer forms, time and quantities on the total and different sizes of potatoes. As the experimental factor, ammonium sulfate, ammonium nitrate and urine were treated, these fertilizer forms were applied in different amounts in three different development periods, including pre-plant, first-dimensional and throat filling periods. This trial, which includes three nitrogen forms and 11 time of application, was established 3 repeatedly, according to the arrangement of "Distributed Parsels in the Chance-Based Complete Blocks Test Design". In the study, large (diameter greater than 5.0 cm), medium (diameter 3.5-5.0 cm), small (diameter smaller than 3.5 cm) and total shell outcomes were studied. The time of application and quantities of nitrogen fertilizers have been determined to have a significant impact on large, small and total fertilizers, except for the average fertilizer, and the forms of nitrogen fertilizers have no effect on any character except for the large fertilizer. As a result, considering the characteristics also, it has been found that in order to get more pottery productivity and to minimize the workforce and time waste, the whole grain should be given in the form of ammonium sulfate once and before planting.

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