In this study, the effects of some physical and chemical soil properties on the growth of hybrid poplar were investigated in the Terme-Gölardi region where a poor growth of trees was observed. Soil samples were taken from both poor and good growth areas. | Turk J Agric For 29 (2005) 221-226 © TÜB‹TAK Effects of Some Soil Properties on the Growth of Hybrid Poplar in the Terme-Gölard› Region of Turkey Ayd›n TÜFEKÇ‹O⁄LU* Kafkas University, Faculty of Forestry, 08000, Artvin - TURKEY Lokman ALTUN, H. Zeki KALAY, Murat YILMAZ Karadeniz Technical University, Faculty of Forestry, 61040 Trabzon - TURKEY Received: Abstract: In this study, the effects of some physical and chemical soil properties on the growth of hybrid poplar were investigated in the Terme-Gölard› region where a poor growth of trees was observed. Soil samples were taken from both poor and good growth areas. Chemical soil properties such as pH, exchangeable Na+, K+, Ca++ and Mg++ content, CEC, phosphorus content and salinity were determined. Physical soil properties such as field capacity, permanent wilting point, water holding capacity and available water were measured. Ground water depth was measured in the field during soil sampling. Clay and Mg++ content and pH of the soils showed a significantly negative correlation while phosphorus and sand content of the soils had a positive correlation with the growth of hybrid poplar. Mg++, K+, and ground water depth explained 43% of the variation of mean annual height growth. The results indicated that soil conditions had a strong influence on the growth of hybrid poplar in the Terme-Gölard› region. Key Words: Hybrid poplar, soil characteristics, mean annual height growth, plantation Baz› Toprak Özelliklerinin Terme-Gölard› Yöresindeki Melez Kavaklar›n Büyümesi Üzerine Olan Etkileri Özet: Bu çal›flmada, Terme-Gölard› yöresinde, baz› alanlarda zay›f büyüme görülmesi üzerine, fiziksel ve kimyasal toprak özelliklerinin melez kavaklar›n büyümesi üzerine olan etkileri araflt›r›lm›flt›r. Toprak örnekleri zay›f ve iyi büyüme gösteren alanlar› temsil edecek flekilde al›nm›flt›r. Al›nan toprak örnekleri üzerinde pH, de¤iflebilir Na+, K+, Ca++ and Mg++, katyon de¤iflim kapasitesi, fosfor, tarla kapasitesi, .
