Question: how to perform fdt test?
Answer: Make hole 15cm depth. [00:28] Remove loose sand. [01:13] Initial weight of sand cone bottle. [01:40] Put bottle on hole & release sand. [01:45] Weight of sand extract from hole. [01:59] Check moisture cont. Of sand by speedy moisture. [02:16] Final weight of bottle after sand fill in hole. [03:20] Test complete. [03:30]