3.5.1. Ipomoea aquatic or kangkung
The t-test of the fresh weights of the total biomass (whole plant) and the selected parts of the harvested biomass (shoot and root) after a month of cultivation showed, on average, a more significant growth of the plant's shoot (p = 0.02) than that of its root (p = 0.72) and clearly demonstrating an overall 50% increase in kangkung fresh weight production (m = 18.1, SD = 2.0, t(3) = 3.2, p = 0.018) for the plants treated with composted SBE compared to that without treatment (m = 12.5, SD = 0.5) ( Fig. 2). It was observed that kangkung treated with composted SBE has a better germination rate, more leaves and healthier growth compared to the control.