Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Investigating the effects of afforestation efforts on some soil properties in semi-arid lands : A case study in Polatli (Sarioba)

Yarı kurak alanlarda gerçekleştirilen ağaçlandırma çalışmalarının bazı toprak özellikleri üzerine etkilerinin irdelenmesi : Polatlı (Sarıoba) örneği

Auteur : ÇAVDAR Gökhan

Université de soutenance : Artvin Çoruh Üniversitesi

Grade : Master of Science (MSc) 2011

Résumé
Overuse and misuse of the lands in Turkey have resulted in many areas having damaged vegetation cover and soil resources or unproductive and even barren lands. In addition, when some other difficulties or limitations such as climatic, topographic and socio-economic factors are present in these areas, the degree of the damage may reach more serious stages. For example, Central Anatolia Region is a region where heavy misuse and overuse of lands have been happening but with the addition of region ?s semi-arid climatic conditions, the degree of damage has been increased. Reforestation projects and efforts have been applied in these damaged areas for long time to reestablish vegetation cover and improve degraded soil properties. However, there is a lack of scientific research whether or not these reforestation efforts have any positive effects especially on soil characteristics. In this study, a land previously used for pasturing and damaged by soil erosion due to over- and heavy-grazing in the Sarıoba Village in Polatlı, Ankara was investigated in order to determine if reforestation efforts have any positive effects on soil properties. With this goal, 60 soil samples were taken with random sampling at 0-30/30-60/60-90 cm depths in two areas, one with forestation efforts were taken place in 1997 and the other without any treatment. Soil samples were analyzed for texture, organic matter, pH, lime, nitrogen, phosphorus, EC, field capacity, wilting point, bulk density and water value. Results indicated that in general the area with forestation efforts have better soil properties than the non-treated area. While high amount of organic matter, clay, nitrogen, field capacity, dust, wilting point, and utilizable water were recorded for the reforested area, the non-treated area had higher pH, sand, lime, and bulk density values.

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