Artvin İlinde Yonca (Medicago sativa L.) Tarımı Yapılan Toprakların Verimlilik Durumu ve Potansiyel Beslenme Problemlerinin Ortaya Konulması

Abstract

This research was carried out to determine nutritional problems and soil fertility status of alfalfa grown soils in Artvin Region. For this objective, 78 soil samples were collected from intensive alfalfa cultivation area and used as material. Texture, pH, EC, CaCO3, organic matter, available P, total N, extractable K, Ca, Mg, Na, B, Fe, Cu, Zn and Mn analysis were done in soil samples and results of them were compared with threshold values. According to obtained results, texture, soil reaction, lime content and salt status were detected as clay loam, sandy clay loam and sandy loam, neutral reaction in 55.13% of samples, low lime content in 58.97% of samples and non salt problem, respectively. In addition, it was determined that most of the soil samples have enough sufficient level in terms of organic matter and total N whereas, 58.97% of samples has insufficient available P and 39.75% of samples has not enough concentration about extractable K. Moreover, extractable Ca, Mg and Na of soils varied between 48-9976, 134-830 and 18-240 mg kg-1 respectively while, it was found sufficient level in terms of extractable Fe, Cu, Zn in soils. As for B and Mn concentration of soils, 46.16% of soils investigated for this research has insufficient extractable B content and 16.67% of soils has also insufficient extractable Mn concentration.