2.3.6. Soil Burial Test

Compost soil was collected from agriculture field at the USM engineering campus, Malaysia for soil burial test. Molded samples (size 10 × 10 × 0.1 mm) were buried at a depth of 15 cm in the ground in USM engineering campus. Five specimens of each sample were taken out in 2, 4, and 6 months for testing. Then, the samples were rinsed with distilled water and blotted with tissue paper to remove dirt. The samples were dried until a constant weight was achieved. The percentage of weight loss was calculated using Equation (3):

$$\%ofweight = \frac{W\_X - W\_O}{W\_O} \times 100\,\% \tag{3}$$

where *W<sup>x</sup>* and *W<sup>o</sup>* indicate the weights of the collected samples and initial weight of the samples.
