Abstract
Over the years, cultivation using sustainable tillage practices has gained significant importance, but the impact of tillage on soil water infiltration is still a concern for landowners due to the possible effects on crop yield. This study investigates the impact of different tillage managements on the infiltration rate of sandy clay loam soil under a semiarid environment. Field experiments were conducted in Chott Mariem Sousse, Tunisia. The tillage practices consisted of three treatments, including a tine cultivator (TC, 16 cm), moldboard plows (MP, 36 cm) and no-tillage (NT). Three infiltration models, Kostiakov, Philip and Horton, were applied to adjust the observed data and evaluate the infiltration characteristics of the studied soils. Comparison criteria, including the coefficient of determination (R2), along with the root mean square error (RMSE) and mean absolute error (MAE), were used to investigate the best-fit model. The results showed that moldboard plowing enhanced soil infiltration capacity relative to tine cultivation and no-tillage treatments. The mean saturated hydraulic conductivity was highest under MP, while it was lowest in NT, with 33.4% and 34.1% reduction compared to TC and MP, respectively. Based on the obtained results, Philip’s model showed better results with observed infiltration due to a higher R2 (0.981, 0.973 and 0.967), lower RMSE (3.36, 9.04 and 9.21) and lower MAE (1.46, 3.53 and 3.72) recorded, respectively, for NT, MP and TC. Horton’s model had a low regression coefficient between observed and predicted values. It was suggested that the Philip two-term model can adequately describe the infiltration process in the study area.
Highlights
IntroductionConservation agriculture (CA) proceeds in a way to minimize harm to the environment [1], and there is a need to fulfill necessary requirements in facilitating investment in sustainable agriculture practices [2]
As put forward by a study [65], we found the evidence points to all similar values at the end of the infiltration test, which can be attributed to the increase in soil surface compaction increased following a decrease in its porosity or crust formation
Conclusions time.InAs put forward a study we found the evidence points all similar values conclusion, the by capacity of [65], infiltration in the studied sandy clayto loam soil increased at the end of the infiltration test, which can be attributed to the increase in soil surface in the order of no-tillage, tine cultivation and moldboard plowing
Summary
Conservation agriculture (CA) proceeds in a way to minimize harm to the environment [1], and there is a need to fulfill necessary requirements in facilitating investment in sustainable agriculture practices [2]. Agriculture in semiarid regions is facing great challenges related to water resource availability. Through water management strategies is crucial, especially from the perspective of climate change. In the last fifteen years, irrigated lands have doubled more than six times in Tunisia
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