The effect of CACO3 on the K content in oat leaf.
Acid soils have characteristic morphological properties and they undergo the process of gleying. They are also poor in water content, aeration and texture. Being of comparatively poor structure, the acid soils are deficient in alkalis and in organic matter so they are generally extremely acid. The current study was focused on liming as a soil amendment measure as well as on determining the oat leaf content of K in the cultivar Mediteran. Soil pH was 5.01 in 2007 and 5.11 in 2008. The variants used included increasing Ca rates compared to the control (the treatments were as follows: T1, T3 and T4 + control – without liming). The trial was conducted under the controlled conditions. The leaf content of K was determined during the flowering and full maturity phenophases. Gleying was performed using atomic absorption spectrophotometry. The content of K in oat leaf was the highest prior to liming with 4 g CaCO3 in 2008 over the flowering phenophase (1.634% dry organic matter) and the lowest in the control variant over the same phase in 2008 (being 0.721% dry organic matter).