EFFECT OF FERTILIZERS ON PRODUCTIVENESS AND QUALITY OF POTATO ROOT FRUITS IN GANJA-KAZAKH REGION OF AZERBAIJAN
The results of the researches conducted on usage mineral fertilizers on manure background are presented in the article. Conducted researches had shown that for getting high and qualitative product of potato root fruits on irrigated grey-brown (chestnut) soils of Ganja-Kazakh region of Azerbaijan it is recommended to use the optimal doze of fertilizers-manure 20t/ha+N<sub>90</sub>P<sub>120</sub>K<sub>90</sub> kg/ha.Obtaining ecologically pure production in connection with the level of the potato mineral food. An application of mineral fertilizers at doses of (NPK)<sub>60</sub> till (NPK)<sub>120</sub> guarantees an available increase of the potato productivity and a good quality of the tulbers. An application of the maximal doze in fertilizer (NPK)<sub>150</sub> of the separate years leads to exceeding of ПДК on nitrates.