Effect of a Subsurface Plastic Film Insertion System on Soil Moisture Regime

Abstract

Systems that enhance water retention in soils have the potential to increase agricultural production as well as mitigate the effects of droughts on crop yields. In the present study, the effect of a Subsurface Plastic Film Insertion System (recycled polyethylene) on soil water retention was evaluated. To this end, four plots were established using the plastic film, applied through subsoiling at a depth of 40 cm. Batteries of tensiometers were installed at soil depths of 0-10 cm, 10-20 cm, 20-30 cm, and 30-40 cm, and their pressure readings were recorded weekly. The results indicated lower soil water matric potential values in the plots with the plastic film compared to the control plots (without the film). These lower values can be attributed to the increased water retention and concentration around the films, which also resulted in a longer duration of elevated soil moisture content, even during periods of no rainfall. This suggests that the a subsurface plastic film insertion system contributed to increased soil moisture, with the potential to enhance agricultural productivity and reduce the impact of drought events on crops.