Fig. 8

Curcuma longa L. rhizomes. The harvested rhizome of Curcuma longa L. 35–1 (a) control, b high-input, and (c) low-input fertilizer treatments (experimental point 45) with in vitro factors set as 18 buds/vessel, 6.25 mM PO₄³⁻, 3 mM Ca²⁺, 1.5 mM Mg²⁺, and 60 mM KNO₃