Quantification of Temporal Variability of Soil Hydraulic Properties in an Agricultural Plot

An improved understanding of temporal variability of soil hydraulic properties (SHPs) can lead to better prediction of soil water dynamics in agricultural fields. This study aims to quantify the temporal variations and trends in SHPs of an experimental agricultural plot in IIT Kanpur during rice and wheat crop seasons. Statistical analysis is performed to investigate the effects of crop-cover, sampling time and depth on temporal variability of SHPs. The soil samples were collected in 6 plots at depths of 10 cm, 25 cm, and 50 cm for the period 2022-23. The samples were analysed for variations in organic carbon content, bulk density (ρ_b), saturated hydraulic conductivity (K_sat) , saturated moisture content (θ_s), and soil water characteristic curve. The results show significant temporal variations in ρ_b and θ_s. The lowest temporal variation in observed in organic carbon content. The temporal trends in SHPs for both rice and wheat crops offer valuable insights into the dynamic nature of soil behaviour during crop cultivation. The findings of this study will contribute to better understanding of soil-water relationships, aiding farmers in optimizing irrigation practices and promoting sustainable agricultural management for improved crop productivity.