Abstract
This four-year field study aimed to demonstrate the effect of nutrient sources and recommended fertilizer application (RFA) based on soil testing result on leaf mineral content and soil chemical properties in newly established ‘Hongro’/M.9 apple orchard. Chemical fertilizer (NPK), castor oil meal, hairy vetch + PK, and no fertilizer treatments were included. The results showed that there were no significant differences between nutrient sources on soil chemical properties, but leaf nitrogen and potassium content tended to be higher in oil meal and hairy vetch treatments. Meanwhile, RFA was revealed to have no effect on increasing soil chemical properties. Therefore, additional application of organic material should be needed in RFA system for appropriate soil nutrient management in newly established apple orchards under low fertility condition. Effect of nutrient sources and recommended fertilizer application on soil chemical properties in ‘Hongro’/M.9 apple orchard.
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