− | * https://www.astm.org/Standards/D3385.htm an alternative method which uses Mariotte tubes to maintain a constant water level during testing. | + | * See most recent version of ASTM D3385 <ref> ASTM International. 2018. ASTM D3385-18 Standard Test Method For Infiltration Rate of Soils in Field Using Double-Ring Infiltrometer.</ref> [https://www.astm.org/Standards/D3385.htm] |