| Abstrak/Abstract |
This study aims to determine the effect of coconut shell biochar, Rhizobium, and recommended doses of Urea+TSP 36+KCl+ZA fertilizer on changes in soil chemical properties and NPK nutrient uptake of edamame plants. Soil sampling was carried out at the beginning before treatment and at harvesting. Sampling of plants was carried out from the age of 7 DAP until the end of the generative phase. This research was conducted in Bolobatur Village, Tempurejo Village, Tempuran District, Magelang Regency, Central Java Province and the Laboratory of the Department of Soil, Faculty of Agriculture, Gadjah Mada University in June 2021 – March 2022. The treatment applied was coconut shell biochar with a dose of 0 tons/day. Ha and 2 tons/Ha, the addition of Rhizobium and without Rhizobium, as well as the addition of 0%, 50%, and 100% recommended doses of Urea+TSP 36+KCl+ZA fertilizer. The results showed that the treatment of coconut shell biochar 2 tons/ha, Rhizobium, and 100% recommended dose of Urea+TSP 36+KCl+ZA fertilizer had a significant effect on edamame plant height and pod sweetness level. This treatment also has an effect on increasing organic matter, CEC, and the availability of soil NPK. The treatment of coconut shell biochar 2 tons/ha, Rhizobium, and 50% recommended dose of Urea+TSP 36+KCl+ZA fertilizer affected N and P uptake so as to reduce N and P fertilization.
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