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Instantaneous Evaluation Of Nitrate, Ammonium, Phosphorus And Potassium Pools In Greenhouse Soils In Antalya Province Of Turkey, Ali Coskan, Atılgan Atilgan, Hasan Oz, Erdinc Isler

Hasan OZ

Nitrogen, phosphorus and potassium are the main components determining yield and quality of intensive agricultural production particularly at undercover production, however; excessive fertilization has some environmental and economical consequences. The aim of this study was to investigate surplus amount of fertilizers at the harvest stage of the greenhouse soils in Antalya Province. Therefore, soil samples were collected from 57 representative greenhouses to determine their mineral nitrogen, available phosphorus and potassium along with organic matter contents. The results revealed that soil from 30% of greenhouses had nitrate values of 30 to 35 kg da-1. Ammonium values were considerably low compared to …