Interaction between Available Phosphorus and Lime Treatments on Extremely Acid pH Soils of Hazelnut Orchards

Abstract

When the pH of extreme acid soils of hazelnut orchards can be increased with lime, some available plant nutrient elements can be increased as well. In this study, the interactions between liming and soil acidity, and the amount of available phosphorus were determined. In the study, fifteen hazelnut orchards showing soil acidity between pH 3 and 4 were selected. The experiment was arranged in a completely randomized design with four incubation times and with three replicates in laboratory conditions. Firstly, the applicable amounts of lime on extreme acid soils were assessed. After an incubation period of four weeks, the amounts of available phosphorus in the soils were determined weekly. In the result of the study, it was determined that to raise the soil pH up to a neutral level, the amount of lime applied to the soil should be increased basing it on a very low pH and according to the buffering property of the soils. The soil pH rose from 3 to neutral by liming and the amounts of available phosphorus in the soils increased. Moreover, the prolongation of the incubation period caused a rise in the soil pH, and thus the amounts of available phosphorus in the soils were increased.