Jeju Accelerates Establishment of Fertilizer Usage Standards for Various Citrus Varieties

The Jeju Special Self-Governing Province Agricultural Technology Institute (Director Sang-hwan Go) announced that it will actively pursue research to establish fertilizer usage standards suitable for each variety of late-maturing citrus to simultaneously improve cultivation efficiency and soil health. According to the Agricultural Technology Institute, the current cultivation area for late-maturing citrus in Jeju is 4,172 hectares as of last year, showing an annual increase. With various late-maturing citrus varieties being introduced, the growth characteristics and nutrient requirements differ, making it urgent to develop fertilization standards for each variety. The Agricultural Technology Institute analyzed soil samples from 30 facility-cultivated sites and found that the average electrical conductivity, which indicates nutrient accumulation, was 3.9 dS/m, available phosphorus content was 557 mg/kg, and exchangeable potassium content was 4.4 cmol+/kg, exceeding the appropriate ...