FRESENIUS ENVIRONMENTAL BULLETIN, vol.26, no.11, pp.6447-6456, 2017 (SCI-Expanded)
Overuse and unconscious use of agricultural lands is causing reduction of organic matters in soil as well as degradation of its chemical structure. The use of chemical and farm manure, the use of organic, organo-mineral, soil adjusters and microbial fertilizers improve efficiency and quality of agricultural production and increase resistance to biotic and abiotic stres. The research was conducted in 2014 and 2015 under Central Anatolian conditions to determine plant ontogenetic phase and effective dose of humic acid (of 15%) + fulvic acid + K and leonardite treatments.