2.6. Pot assay
The small scale pot assays of SBE-based bio organic fertilizer on plant growth assessment was carried out on (1) Ipomoea aquatic or kangkung, (2) Abelmoschus esculentus or okra. The PVC pots measured 12 cm and 25 cm in height and 12 cm and 25 cm in diameter, respectively were filled up with the treatment and control soils to about three quarters full. The soil used was sandy loam pre-mixed with compost (commercially available) with a moisture of 45–55%, pH 5.5–6.5 and C:N 25–35