o:3057 Assessment of water quality for irrigation in the Mačva region by using traditional and contemporary classifications en Abstract: In the area of Mačva region of the Republic of Serbia, during 2017, it was carried out a survey which included assessment of the quality of available irrigation water. The agricultural areas in which the survey was conducted were in ten locations under the type of drop-type irrigation system, four are irrigated by artificial rain, and eleven plots intended to apply some of the irrigation methods in the near future. Of the 26 tested water samples, according to the FAO classification, 65.4% belongs to the class of drinking water and irrigation, out of which 34.6% are irrigation water. According to the US Salinity Laboratory classification, the samples of irrigation water belong to the following: 7.7% to the class C1- S1, 69.2% to the class C2-S1 and 23.1% to the class C3-S1. According to Nejgebauer classification, the tested water samples belong to Ia (88.5%) and Ib (11.5%) class. According to the RSC-Residual Sodium Carbonate classification, 92.3% of the samples tested belong to the class of good waters, and 7.7% of the water samples are at the margin of usability. In all tested samples, the content of microelements and heavy metals, with the exception of nickel content, is below the maximum allowable concentration (MAC). In samples No. 3, 12, 21, 23, 24, the content of nickel is slightly above MAC value for irrigation water. In the tested water samples, the content of ammonia (NH4-N), nitrate (NO3-N) and nitrite (NO2-N) nitrogen was analysed. The content of ammonia and nitrate nitrogen is within the prescribed limits, but in 65.4% of the analysed samples of irrigation water, the content of nitrite nitrogen is above the MAC. As the nitrate-nitrite ratio is dynamic, it is necessary to monitor the contents of these parameters at least twice a year (if the water from these wells is used as a technical one). When water from the wells is used for drinking and livestock wate agriculture soil, water quality, heavy metals, microelements 2023-10-19T07:07:05.872Z 44 no 46 Radmila Pivić Institute of Soil Science 0000-0002-5848-1551 46 Dragana Jošić Institute of Soil Science 46 Zoran Dinić Institute of Soil Science 0000-0003-4109-4106 46 Jelena Maksimović Institute of Soil Science 0000-0001-5217-3972 46 Aleksandra Stanojković-Sebić Institute of Soil Science 0000-0002-5176-9827 application/pdf 5717755 https://unilib.phaidrabg.rs/o:3057 no yes 1 70 92000004 71A05 International Conference on Agriculture, Forest, Food Sciences and Technologies (ICAFOF) 2018