Study on The Effect of Humic Acid on The Migration Distance of Wetting Front During Water Infiltration

Abstract

Abstract Humic acid is widely used at this stage, and studying the influence of humic acid on the transportation distance of wet front in the process of soil water infiltration is helpful to agricultural production. Orthogonal test table L16 (45) was used to design the test plan. Three test factors, humic acid, soil bulk density, and initial soil moisture content, were selected, and four levels were selected for each factor for experimental research. The test results show that all three factors have an impact on the distance of the wet front migration, but humic acid has the largest and most obvious impact.