SOIL Studies

SOIL Studies

2020, Vol 9, Num, 2     (Pages: 060-071)

Status of Nitrogenous Chemical Fertilizer and Effects of Soil Analysis Obligation on Use by Nitrogenous Fertilizer in Turkey

Haydar POLAT 1

1 Toprak Gübre ve Su Kaynakları Merkez Araştırma Enstitüsü, Ankara

DOI: 10.21657/topraksu.568939
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The aim of this study was to investigate the long term consumption of nitrogenous fertilizers in Turkey and to determinate the need of soil analysis obligation which was put into practice in 2010 on use by nitrogenous fertilizers. In this study, consumption of nitrogenous fertilizer were evaluated in 5 periods of seven years from 1982 to 2016. Data from this study showed that the use of nitrogenous fertilizer significantly (p<0.01) increased by 2484378 tons annually in the first period and in the 5th period reached by 3208386 tons. Mean of consumption of nitrogenous fertilizer was 2781902 tons. Another data of this study presented that average of consumption of ammonium sulfate fertilizer had the high value in the 1st period, however, it decreased in the other periods and reached the highest level by increasing again in the 5th period (p <0.01). Although the amount of calcium ammonium nitrate fertilizer had the highest consumption value compared to other fertilizers in the first periods it was observed that decreased significantly over time (p <0.01) and was the least consumed in 2016. The consumption and percentage of urea and ammonium nitrate fertilizers changed periodically and these fertilizers increased significantly (p <0.01) in the first years. Majority of the soil in Turkey is calcareous and has a high soil pH. Thus, especially in the 5th period when the soil analyses obligation started for fertilizer supports consumption of ammonium sulphate significantly (p <0.01) increased. It is clear that nitrogenous fertilizer consumption has reached the highest level in the 5th period and deficiency of nitrogenous fertilizers is visible after soil analyses. Finally, the lack of nitrogenous fertilizer in agricultural lands in Turkey can be seen due to the soil analyses obligation.

Keywords : Ammonium nitrate, ammonium sulfate, fertilizer support, use of fertilizer, urea