بالحمد, خالد2026-01-302026-01-302023-05-17https://dspace.omu.edu.ly/handle/123456789/516The effect of reduced (conservation) and conventional (intensive) tillage systems on some physical soil properties and its productivity was studied on the slopes of Al-Haniyah.The experiment was carried out in the north of Al-Haniyah, an agricultural area in Al-Jabal Al-Akhdar region, eastern Libya. Barley crop was cultivated under the influence of four different tillage systems with the addition of mineral and organic fertilizers, The experiment was designed with split plotdesign, where the tillage systems represented the main plots and the fertilization treatments represented the secondary plots in three replications.Soil samples were taken from all plots to estimate bulk density, moisture content and porosity. Some field experiments were also conducted such as soil resistance to penetration and infiltration rate. Collection basins were established at the end of the main plots to intercept surface runoff.Sediment samples collected in the basin were taken after each rainstorm, and the amount of soil lost from each plot was weighed in the laboratory, in order to compare the different tillage systems in terms of their impact on soil erosion rates.The study did not find a significant difference between the used tillage systems in affecting the bulk density, moisture content, porosity and infiltration rate,Where only relative differences were recorded in favour of conventionaltillage, however, conventionaltillage had a significant role in reducing soil resistance to penetration.On the other hand, fertilization treatments (mineral - organic) recorded positive significant effects compared to the control treatment in affecting these characteristics.The study recorded a relative increase in plant height, biological and economic weight of the crop, as well as the thousand-grain weight index under the intensive tillage systems compared to the reduced tillage. Also, Fertilizer treatments had a clear positive effect on all the production characteristics of the cultivated crop.On the other hand, fertilizer additions contributed to increasing the efficiency of reduced tillage performance with weight and productivity indicators,This confirms the need for the application of reduced tillage systems to be part of an integrated and sustainable agricultural management that includes fertilization, weed control and seed selection. The study found significant differences in soil loss by water erosion under the different tillage systems.The recorded losses were twice as high with the conventional intensive tillage compared to the reduced tillage.This proves one of the important hypotheses of this research, which is the important role that soil conservation tillage can play in preserving shallow degraded slopes from erosion and improving soil depth and properties over time.Thesis